Linus Torvalds [Mon, 13 Feb 2012 22:15:22 +0000 (14:15 -0800)]
Merge branch 'omap-fixes-urgent' of git://git.linaro.org/people/rmk/linux-arm
This pull request covers the major oopsing issues with OMAP, caused by
the lack of the TWL driver. Even when the TWL driver is not built in,
we shouldn't oops.
* 'omap-fixes-urgent' of git://git.linaro.org/people/rmk/linux-arm:
ARM: omap: fix broken twl-core dependencies and ifdefs
ARM: omap: fix oops in drivers/video/omap2/dss/dpi.c
ARM: omap: fix oops in arch/arm/mach-omap2/vp.c when pmic is not found
Linus Torvalds [Mon, 13 Feb 2012 22:14:19 +0000 (14:14 -0800)]
Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm
* 'fixes' of git://git.linaro.org/people/rmk/linux-arm:
ARM: 7322/1: Print BUG instead of undefined instruction on BUG_ON()
ARM: 7321/1: cache-v7: Disable preemption when reading CCSIDR
ARM: 7320/1: Fix proc_info table alignment
Linus Torvalds [Mon, 13 Feb 2012 21:56:14 +0000 (13:56 -0800)]
i387: make irq_fpu_usable() tests more robust
Some code - especially the crypto layer - wants to use the x86
FP/MMX/AVX register set in what may be interrupt (typically softirq)
context.
That *can* be ok, but the tests for when it was ok were somewhat
suspect. We cannot touch the thread-specific status bits either, so
we'd better check that we're not going to try to save FP state or
anything like that.
Now, it may be that the TS bit is always cleared *before* we set the
USEDFPU bit (and only set when we had already cleared the USEDFP
before), so the TS bit test may actually have been sufficient, but it
certainly was not obviously so.
So this explicitly verifies that we will not touch the TS_USEDFPU bit,
and adds a few related sanity-checks. Because it seems that somehow
AES-NI is corrupting user FP state. The cause is not clear, and this
patch doesn't fix it, but while debugging it I really wanted the code to
be more obviously correct and robust.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Mon, 13 Feb 2012 21:47:25 +0000 (13:47 -0800)]
i387: math_state_restore() isn't called from asm
It was marked asmlinkage for some really old and stale legacy reasons.
Fix that and the equally stale comment.
Noticed when debugging the irq_fpu_usable() bugs.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 11 Feb 2012 18:07:11 +0000 (10:07 -0800)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Says Jens:
"Time to push off some of the pending items. I really wanted to wait
until we had the regression nailed, but alas it's not quite there yet.
But I'm very confident that it's "just" a missing expire on exit, so
fix from Tejun should be fairly trivial. I'm headed out for a week on
the slopes.
- Killing the barrier part of mtip32xx. It doesn't really support
barriers, and it doesn't need them (writes are fully ordered).
- A few fixes from Dan Carpenter, preventing overflows of integer
multiplication.
- A fixup for loop, fixing a previous commit that didn't quite solve
the partial read problem from Dave Young.
- A bio integer overflow fix from Kent Overstreet.
- Improvement/fix of the door "keep locked" part of the cdrom shared
code from Paolo Benzini.
- A few cfq fixes from Shaohua Li.
- A fix for bsg sysfs warning when removing a file it did not create
from Stanislaw Gruszka.
- Two fixes for floppy from Vivek, preventing a crash.
- A few block core fixes from Tejun. One killing the over-optimized
ioc exit path, cleaning that up nicely. Two others fixing an oops
on elevator switch, due to calling into the scheduler merge check
code without holding the queue lock."
* 'for-linus' of git://git.kernel.dk/linux-block:
block: fix lockdep warning on io_context release put_io_context()
relay: prevent integer overflow in relay_open()
loop: zero fill bio instead of return -EIO for partial read
bio: don't overflow in bio_get_nr_vecs()
floppy: Fix a crash during rmmod
floppy: Cleanup disk->queue before caling put_disk() if add_disk() was never called
cdrom: move shared static to cdrom_device_info
bsg: fix sysfs link remove warning
block: don't call elevator callbacks for plug merges
block: separate out blk_rq_merge_ok() and blk_try_merge() from elevator functions
mtip32xx: removed the irrelevant argument of mtip_hw_submit_io() and the unused member of struct driver_data
block: strip out locking optimization in put_io_context()
cdrom: use copy_to_user() without the underscores
block: fix ioc locking warning
block: fix NULL icq_cache reference
block,cfq: change code order
Tejun Heo [Sat, 11 Feb 2012 11:37:25 +0000 (12:37 +0100)]
block: fix lockdep warning on io_context release put_io_context()
11a3122f6c "block: strip out locking optimization in put_io_context()"
removed ioc_lock depth lockdep annoation along with locking
optimization; however, while recursing from put_io_context() is no
longer possible, ioc_release_fn() may still end up putting the last
reference of another ioc through elevator, which wlil grab ioc->lock
triggering spurious (as the ioc is always different one) A-A deadlock
warning.
As this can only happen one time from ioc_release_fn(), using non-zero
subclass from ioc_release_fn() is enough. Use subclass 1.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Linus Torvalds [Fri, 10 Feb 2012 22:18:46 +0000 (14:18 -0800)]
Merge git://git./linux/kernel/git/davem/net
Quoth David:
1) GRO MAC header comparisons were ethernet specific, breaking other
link types. This required a multi-faceted fix to cure the originally
noted case (Infiniband), because IPoIB was lying about it's actual
hard header length. Thanks to Eric Dumazet, Roland Dreier, and
others.
2) Fix build failure when INET_UDP_DIAG is built in and ipv6 is modular.
From Anisse Astier.
3) Off by ones and other bug fixes in netprio_cgroup from Neil Horman.
4) ipv4 TCP reset generation needs to respect any network interface
binding from the socket, otherwise route lookups might give a
different result than all the other segments received. From Shawn
Lu.
5) Fix unintended regression in ipv4 proxy ARP responses, from Thomas
Graf.
6) Fix SKB under-allocation bug in sh_eth, from Yoshihiro Shimoda.
7) Revert skge PCI mapping changes that are causing crashes for some
folks, from Stephen Hemminger.
8) IPV4 route lookups fill in the wildcarded fields of the given flow
lookup key passed in, which is fine most of the time as this is
exactly what the caller's want. However there are a few cases that
want to retain the original flow key values afterwards, so handle
those cases properly. Fix from Julian Anastasov.
9) IGB/IXGBE VF lookup bug fixes from Greg Rose.
10) Properly null terminate filename passed to ethtool flash device
method, from Ben Hutchings.
11) S3 resume fix in via-velocity from David Lv.
12) Fix double SKB free during xmit failure in CAIF, from Dmitry
Tarnyagin.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (72 commits)
net: Don't proxy arp respond if iif == rt->dst.dev if private VLAN is disabled
ipv4: Fix wrong order of ip_rt_get_source() and update iph->daddr.
netprio_cgroup: fix wrong memory access when NETPRIO_CGROUP=m
netprio_cgroup: don't allocate prio table when a device is registered
netprio_cgroup: fix an off-by-one bug
bna: fix error handling of bnad_get_flash_partition_by_offset()
isdn: type bug in isdn_net_header()
net: Make qdisc_skb_cb upper size bound explicit.
ixgbe: ethtool: stats user buffer overrun
ixgbe: dcb: up2tc mapping lost on disable/enable CEE DCB state
ixgbe: do not update real num queues when netdev is going away
ixgbe: Fix broken dependency on MAX_SKB_FRAGS being related to page size
ixgbe: Fix case of Tx Hang in PF with 32 VFs
ixgbe: fix vf lookup
igb: fix vf lookup
e1000: add dropped DMA receive enable back in for WoL
gro: more generic L2 header check
IPoIB: Stop lying about hard_header_len and use skb->cb to stash LL addresses
zd1211rw: firmware needs duration_id set to zero for non-pspoll frames
net: enable TC35815 for MIPS again
...
Thomas Graf [Fri, 10 Feb 2012 04:07:11 +0000 (04:07 +0000)]
net: Don't proxy arp respond if iif == rt->dst.dev if private VLAN is disabled
Commit 653241 (net: RFC3069, private VLAN proxy arp support) changed
the behavior of arp proxy to send arp replies back out on the interface
the request came in even if the private VLAN feature is disabled.
Previously we checked rt->dst.dev != skb->dev for in scenarios, when
proxy arp is enabled on for the netdevice and also when individual proxy
neighbour entries have been added.
This patch adds the check back for the pneigh_lookup() scenario.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Jesper Dangaard Brouer <hawk@comx.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Li Wei [Thu, 9 Feb 2012 21:15:25 +0000 (21:15 +0000)]
ipv4: Fix wrong order of ip_rt_get_source() and update iph->daddr.
This patch fix a bug which introduced by commit
ac8a4810 (ipv4: Save
nexthop address of LSRR/SSRR option to IPCB.).In that patch, we saved
the nexthop of SRR in ip_option->nexthop and update iph->daddr until
we get to ip_forward_options(), but we need to update it before
ip_rt_get_source(), otherwise we may get a wrong src.
Signed-off-by: Li Wei <lw@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Neil Horman [Fri, 10 Feb 2012 05:43:38 +0000 (05:43 +0000)]
netprio_cgroup: fix wrong memory access when NETPRIO_CGROUP=m
When the netprio_cgroup module is not loaded, net_prio_subsys_id
is -1, and so sock_update_prioidx() accesses cgroup_subsys array
with negative index subsys[-1].
Make the code resembles cls_cgroup code, which is bug free.
Origionally-authored-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Neil Horman [Fri, 10 Feb 2012 05:43:37 +0000 (05:43 +0000)]
netprio_cgroup: don't allocate prio table when a device is registered
So we delay the allocation till the priority is set through cgroup,
and this makes skb_update_priority() faster when it's not set.
This also eliminates an off-by-one bug similar with the one fixed
in the previous patch.
Origionally-authored-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Neil Horman [Fri, 10 Feb 2012 05:43:36 +0000 (05:43 +0000)]
netprio_cgroup: fix an off-by-one bug
# mount -t cgroup xxx /mnt
# mkdir /mnt/tmp
# cat /mnt/tmp/net_prio.ifpriomap
lo 0
eth0 0
virbr0 0
# echo 'lo 999' > /mnt/tmp/net_prio.ifpriomap
# cat /mnt/tmp/net_prio.ifpriomap
lo 999
eth0 0
virbr0
4101267344
We got weired output, because we exceeded the boundary of the array.
We may even crash the kernel..
Origionally-authored-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Fri, 10 Feb 2012 17:06:25 +0000 (09:06 -0800)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/i915: fixup interlaced bits clearing in PIPECONF on PCH_SPLIT (v2)
drm/i915: no lvds quirk for AOpen MP45
drm/i915: Force explicit bpp selection for intel_dp_link_required
drm/radeon: do not continue after error from r600_ib_test
drivers/gpu/drm/drm_ioc32.c: initialize all fields
drm/i915: fixup interlaced bits clearing in PIPECONF on PCH_SPLIT
drm/i915:: Disable FBC on SandyBridge
Linus Torvalds [Fri, 10 Feb 2012 17:05:52 +0000 (09:05 -0800)]
Merge tag 'writeback-fixes' of git://git./linux/kernel/git/wfg/linux
fix 1 mysterious divide error
fix 3 NULL dereference bugs in writeback tracing, on SD card removal w/o umount
* tag 'writeback-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wfg/linux:
writeback: fix dereferencing NULL bdi->dev on trace_writeback_queue
lib: proportion: lower PROP_MAX_SHIFT to 32 on 64-bit kernel
writeback: fix NULL bdi->dev in trace writeback_single_inode
backing-dev: fix wakeup timer races with bdi_unregister()
Linus Torvalds [Fri, 10 Feb 2012 17:05:07 +0000 (09:05 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf: Fix double start/stop in x86_pmu_start()
perf evsel: Fix an issue where perf report fails to show the proper percentage
perf tools: Fix prefix matching for kernel maps
perf tools: Fix perf stack to non executable on x86_64
perf: Remove deprecated WARN_ON_ONCE()
Linus Torvalds [Fri, 10 Feb 2012 17:04:37 +0000 (09:04 -0800)]
Merge tag 'hwmon-for-linus' of git://git./linux/kernel/git/groeck/linux-staging
Couple of regressions, couple of zero-day bugs, a minor enhancement.
Nothing really major.
* tag 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (f75375s) Let f75375_update_device treat pwmX as a measured value
hwmon: (f75375s) Fix bit shifting in f75375_write16
hwmon: (f75375s) Fix reading of wrong register when initializing the F75387
hwmon: (f75375s) Fix automatic pwm mode setting for F75373 & F75375
hwmon: (w83627ehf) Remove duplicate code
Dave Airlie [Fri, 10 Feb 2012 08:35:19 +0000 (08:35 +0000)]
Merge branch 'drm-intel-fixes' of git://git./linux/kernel/git/keithp/linux into drm-fixes
* 'drm-intel-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/keithp/linux:
drm/i915: fixup interlaced bits clearing in PIPECONF on PCH_SPLIT (v2)
drm/i915: no lvds quirk for AOpen MP45
drm/i915: Force explicit bpp selection for intel_dp_link_required
drm/i915: fixup interlaced bits clearing in PIPECONF on PCH_SPLIT
drm/i915:: Disable FBC on SandyBridge
Dan Carpenter [Fri, 10 Feb 2012 08:03:58 +0000 (09:03 +0100)]
relay: prevent integer overflow in relay_open()
"subbuf_size" and "n_subbufs" come from the user and they need to be
capped to prevent an integer overflow.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: stable@kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Linus Torvalds [Thu, 9 Feb 2012 21:52:57 +0000 (13:52 -0800)]
Merge tag 'tty-3.3-rc3' of git://git./linux/kernel/git/gregkh/tty
Serial/TTY fixes for the 3.3-rc3 tree
Just a few new device ids, omap serial driver regression fixes, and a
build fix for the 8250 driver movement.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tag 'tty-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
tty: serial: omap-serial: wakeup latency constraint is in microseconds, not milliseconds
tty: serial: OMAP: block idle while the UART is transferring data in PIO mode
tty: serial: OMAP: use a 1-byte RX FIFO threshold in PIO mode
m32r: relocate drivers back out of 8250 dir
tty: fix a build failure on sparc
serial: samsung: Add support for EXYNOS5250
serial: samsung: Add support for EXYNOS4212 and EXYNOS4412
drivers/tty/vt/vt_ioctl.c: fix KDFONTOP 32bit compatibility layer
Linus Torvalds [Thu, 9 Feb 2012 21:52:18 +0000 (13:52 -0800)]
Merge tag 'staging-3.3-rc3' of git://git./linux/kernel/git/gregkh/staging
Staging tree patches for 3.3-rc3
Big things here is the deletion of the Android pmem driver, as it's
obsolete and no one uses it, the gma500 driver as it's already in the
drm portion of the kernel tree, and the pohmelfs filesystem as it's
obsolete and a rewritten version is being proposed for the fs/ section
of the kernel.
Other than that, a smattering of different bugfixes and regressions, and
some omap drm api merge fixups that were needed due to api changes in
the main portion of the drm tree, allowing this code to build properly
again.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tag 'staging-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (28 commits)
staging: pohmelfs: remove drivers/staging/pohmelfs
staging: android/ram_console: Don't build on arches w/o ioremap
staging: r8712u: Use asynchronous firmware loading
staging: usbip: fix to prevent potentially using uninitialized spinlock
staging: r8712u: Fix problem when CONFIG_R8712_AP is set
staging: tidspbridge: fix incorrect free to drv_datap
staging: tidspbridge: fix bridge_open memory leaks
staging: android: lowmemorykiller: Don't wait more than one second for a process to die
MAINTAINERS: staging: iio: add iio information
staging: zcache: fix serialization bug in zv stats
staging: fix go7007-usb license
Staging: android: binder: Fix crashes when sharing a binder file between processes
Staging: android: Remove pmem driver
Staging: asus_oled: fix NULL-ptr crash on unloading
Staging: asus_oled: fix image processing
Staging: android: binder: Don't call dump_stack in binder_vma_open
staging: r8712u: Add new Sitecom UsB ID
zcache: Set SWIZ_BITS to 8 to reduce tmem bucket lock contention.
zcache: fix deadlock condition
staging: drm/omap: fix locking issue
...
Linus Torvalds [Thu, 9 Feb 2012 21:51:36 +0000 (13:51 -0800)]
Merge tag 'driver-core-3.3-rc3' of git://git./linux/kernel/git/gregkh/driver-core
Driver core fixes for the 3.3-rc3 tree.
A few fixes for kobject warnings that have popped up in the cpu hotplug path,
and a regression fix for the speed of the hotplug memory code.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tag 'driver-core-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
driver-core: cpu: fix kobject warning when hotplugging a cpu
ACPI: remove duplicated lines of merging problems with acpi_processor_add
docbook: fix fatal errors in device-drivers docbook and add DMA Management section
drivers/base/memory.c: fix memory_dev_init() long delay
driver core: cpu: remove kernel warning when removing a cpu
Linus Torvalds [Thu, 9 Feb 2012 21:51:13 +0000 (13:51 -0800)]
Merge tag 'char-misc-3.3-rc3' of git://git./linux/kernel/git/gregkh/char-misc
Minor char-misc fixes for 3.3-rc3
Nothing big here, some Kconfig fixes for the MISC_DEVICES config option
that was being used incorrectly, and some other minor bug fixes.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tag 'char-misc-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
mmc: cb710 core: Add missing spin_lock_init for irq_lock of struct cb710_chip
cs5535-mfgpt: don't call __init function from __devinit
vmw_balloon: fix for a -Wuninitialized warning
drivers: misc: Remove MISC_DEVICES config option
c2port: fix build error for duramar2150 due to missing header.
Linus Torvalds [Thu, 9 Feb 2012 21:50:54 +0000 (13:50 -0800)]
Merge tag 'usb-3.3-rc3' of git://git./linux/kernel/git/gregkh/usb
USB fixes for 3.3-rc3
Here are a few minor USB fixes and a bunch of device id updates for the
USB drivers.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* tag 'usb-3.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: usbserial: add new PID number (0xa951) to the ftdi driver
usb: ch9.h: usb_endpoint_maxp() uses __le16_to_cpu()
usb: musb: fix a build error on mips
uwb & wusb & usb wireless controllers: fix kconfig error & build errors
usb: Skip PCI USB quirk handling for Netlogic XLP
powerpc/usb: fix issue of CPU halt when missing USB PHY clock
usb: otg: mv_otg: Add dependence
usb: host: Distinguish Kconfig text for Freescale controllers
USB: add new zte 3g-dongle's pid to option.c
usb: ch9.h: usb_endpoint_maxp() uses __le16_to_cpu()
USB: qcserial: don't enable autosuspend
USB: qcserial: add several new serial devices
usb: otg: mv_otg: Add dependence
usb: gadget: zero: fix bug in loopback autoresume handling
Dan Carpenter [Thu, 9 Feb 2012 00:49:34 +0000 (00:49 +0000)]
bna: fix error handling of bnad_get_flash_partition_by_offset()
The current error handling doesn't work because we flash_part is a u32
so the checks for negative error codes don't work. I considered making
things signed but I don't know the hardware enough to say if that's a
problem. Really, we don't use the error codes so just returning zero
for all problems is fine.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Dan Carpenter [Thu, 9 Feb 2012 00:46:47 +0000 (00:46 +0000)]
isdn: type bug in isdn_net_header()
We use len to store the return value from eth_header(). eth_header()
can return -ETH_HLEN (-14). We want to pass this back instead of
truncating it to 65522 and returning that.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Nikolaus Schulz [Wed, 8 Feb 2012 17:56:11 +0000 (18:56 +0100)]
hwmon: (f75375s) Let f75375_update_device treat pwmX as a measured value
Treat pwmX as a measured value, not as a (mostly static) limit value, so
that it is updated more frequently from the device register.
Signed-off-by: Nikolaus Schulz <mail@microschulz.de>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
David S. Miller [Mon, 6 Feb 2012 20:14:37 +0000 (15:14 -0500)]
net: Make qdisc_skb_cb upper size bound explicit.
Just like skb->cb[], so that qdisc_skb_cb can be encapsulated inside
of other data structures.
This is intended to be used by IPoIB so that it can remember
addressing information stored at hard_header_ops->create() time that
it can fetch when the packet gets to the transmit routine.
Signed-off-by: David S. Miller <davem@davemloft.net>
Paul Walmsley [Thu, 26 Jan 2012 02:50:56 +0000 (19:50 -0700)]
tty: serial: omap-serial: wakeup latency constraint is in microseconds, not milliseconds
The receive FIFO wakeup latency estimate in the omap-serial driver is
three orders of magnitude too small. This effectively prevents the
MPU from going to a low-power state when CONFIG_CPU_IDLE=y. This is a
major power management regression and masks some other FIFO-related
bugs in the driver.
Fix by correcting the most egregious problem in the RX wakeup latency
estimate. There are several other flaws in the estimator; these will
be fixed by a separate patch series intended for 3.4.
The difference in low-power states with this patch can be observed via
debugfs in pm_debug/count.
This estimate does not have any effect when CONFIG_CPU_IDLE=n.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Alan Cox <alan@linux.intel.com>
Acked-by: Govindraj.R <govindraj.raja@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Walmsley [Thu, 26 Jan 2012 02:50:52 +0000 (19:50 -0700)]
tty: serial: OMAP: block idle while the UART is transferring data in PIO mode
Prevent OMAP UARTs from going idle while they are still transferring
data in PIO mode. This works around an oversight in the OMAP UART
hardware present in OMAP34xx and earlier: an idle UART won't send a
wakeup when the TX FIFO threshold is reached. This causes long delays
during data transmission when the MPU powerdomain enters a low-power
mode. The MPU interrupt controller is not able to respond to
interrupts when it's in a low-power state, so the TX buffer is not
refilled until another wakeup event occurs.
This fix changes the erratum i291 DMA idle workaround. Rather than
toggling between force-idle and no-idle, it will toggle between
smart-idle and no-idle. The important part of the workaround is the
no-idle part, so this shouldn't result in any change in behavior.
This fix should work on all OMAP UARTs. Future patches intended for
the 3.4 merge window will make this workaround conditional on a
"feature" flag, and will use the OMAP36xx+ TX event wakeup support.
Thanks to Kevin Hilman <khilman@ti.com> for mentioning the erratum i291
workaround, which led to the development of this approach.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Govindraj.R <govindraj.raja@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Walmsley [Thu, 26 Jan 2012 02:50:36 +0000 (19:50 -0700)]
tty: serial: OMAP: use a 1-byte RX FIFO threshold in PIO mode
In the (default) PIO mode, use a one-byte RX FIFO threshold. The OMAP
UART IP blocks do not appear to be capable of waking the system under
an RX timeout condition. Since the previous RX FIFO threshold was 16
bytes, this meant that omap-serial.c did not become aware of any
received data until all those bytes arrived or until another UART
interrupt occurred. This made the serial console and presumably other
serial applications (GPS, serial Bluetooth) unusable or extremely
slow. A 1-byte RX FIFO threshold also allows the MPU to enter a
low-power consumption state while waiting for the FIFO to fill.
This can be verified using the serial console by comparing the
behavior when "
0123456789abcde" is pasted in from another window, with
the behavior when "
0123456789abcdef" is pasted in. Since the former
string is less than sixteen bytes long, the string is not echoed for
some time, while the latter string is echoed immediately.
DMA operation is unaffected by this patch.
Thanks to Russell King - ARM Linux <linux@arm.linux.org.uk> for some
additional information on the standard behavior of the RX timeout
event, which was used to improve this commit description.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Govindraj Raja <govindraj.r@ti.com>
Cc: Alan Cox <alan@linux.intel.com>
Cc: Russell King <linux@arm.linux.org.uk>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Tested-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David Howells [Thu, 9 Feb 2012 15:48:20 +0000 (15:48 +0000)]
Reduce the number of expensive division instructions done by _parse_integer()
_parse_integer() does one or two division instructions (which are slow)
per digit parsed to perform the overflow check.
Furthermore, these are particularly expensive examples of division
instruction as the number of clock cycles required to complete them may
go up with the position of the most significant set bit in the dividend:
if (*res > div_u64(ULLONG_MAX - val, base))
which is as maximal as possible.
Worse, on 32-bit arches, more than one of these division instructions
may be required per digit.
So, assuming we don't support a base of more than 16, skip the check if the
top nibble of the result is not set at this point.
Signed-off-by: David Howells <dhowells@redhat.com>
[ Changed it to not dereference the pointer all the time - even if the
compiler can and does optimize it away, the code just looks cleaner.
And edited the top nybble test slightly to make the code generated on
x86-64 better in the loop - test against a hoisted constant instead of
shifting and testing the result ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Russell King [Tue, 7 Feb 2012 09:47:21 +0000 (09:47 +0000)]
ARM: omap: fix broken twl-core dependencies and ifdefs
In commit
aeb5032b3f, a dependency on IRQ_DOMAIN was added, which causes
regressions on previously working setups: a previously working non-DT
kernel configuration now loses its PMIC support. The lack of PMIC
support in turn causes the loss of other functionality the kernel had.
This dependency was added because the driver now registers its
interrupts with the IRQ domain code, presumably to prevent a build error.
The result is that OMAP3 oopses in the vp.c code (fixed by a previous
commit) due to the lack of PMIC support.
However, even with IRQ_DOMAIN enabled, the driver oopses:
Unable to handle kernel NULL pointer dereference at virtual address
00000000
pgd =
c0004000
[
00000000] *pgd=
00000000
Internal error: Oops: 5 [#1] SMP
Modules linked in:
CPU: 1 Not tainted (3.3.0-rc2+ #271)
PC is at irq_domain_add+0x1c/0x134
LR is at twl_probe+0xd0/0x370
pc : [<
c007bad0>] lr : [<
c029baac>] psr:
00000113
sp :
df843c48 ip :
df843c68 fp :
df843c64
r10:
c02b93e4 r9 :
00000000 r8 :
c029b9dc
r7 :
df9d8a00 r6 :
c03bef90 r5 :
00000000 r4 :
c03f5240
r3 :
00000000 r2 :
c03f5240 r1 :
00000015 r0 :
c03f5240
Flags: nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
Control:
10c5387d Table:
8000404a DAC:
00000015
Process swapper/0 (pid: 1, stack limit = 0xdf8422f0)
Stack: (0xdf843c48 to 0xdf844000)
3c40:
00000014 00000170 00000014 c03bef90 df843c9c df843c68
3c60:
c029baac c007bac0 00000000 df9d8a20 00000001 c03cd238 c02b93e4 df9d8a20
3c80:
df9d8a04 df9d8a00 c029b9dc df8cae08 df843cc4 df843ca0 c01eee70 c029b9e8
...
Backtrace:
[<
c007bab4>] (irq_domain_add+0x0/0x134) from [<
c029baac>] (twl_probe+0xd0/0x370)
r6:
c03bef90 r5:
00000014 r4:
00000170
[<
c029b9dc>] (twl_probe+0x0/0x370) from [<
c01eee70>] (i2c_device_probe+0xb0/0xe4)
[<
c01eedc0>] (i2c_device_probe+0x0/0xe4) from [<
c01d1f34>] (really_probe+0xa0/0x178)
r8:
df8f0070 r7:
c03cd238 r6:
df9d8a20 r5:
df9d8a20 r4:
df9d8a20
[<
c01d1e94>] (really_probe+0x0/0x178) from [<
c01d205c>] (driver_probe_device+0x50/0x68)
r7:
df843d18 r6:
df9d8a20 r5:
c03cd238 r4:
df9d8a20
[<
c01d200c>] (driver_probe_device+0x0/0x68) from [<
c01d2148>] (__device_attach+0x44/0x48)
r5:
df9d8a20 r4:
c03cd238
[<
c01d2104>] (__device_attach+0x0/0x48) from [<
c01d0840>] (bus_for_each_drv+0x58/0x98)
r5:
c01d2104 r4:
00000000
[<
c01d07e8>] (bus_for_each_drv+0x0/0x98) from [<
c01d21f8>] (device_attach+0x80/0xac)
r7:
df9d8a28 r6:
df9d8a54 r5:
c03cd978 r4:
df9d8a20
[<
c01d2178>] (device_attach+0x0/0xac) from [<
c01d1430>] (bus_probe_device+0x34/0xa4)
r6:
df9d8a20 r5:
c03cd978 r4:
df9d8a20
[<
c01d13fc>] (bus_probe_device+0x0/0xa4) from [<
c01cffb0>] (device_add+0x2a0/0x420)
r6:
00000000 r5:
df9d8a20 r4:
df9d8a20
[<
c01cfd10>] (device_add+0x0/0x420) from [<
c01d0150>] (device_register+0x20/0x24)
r8:
df9d8a00 r7:
df9d8a04 r6:
df8f0048 r5:
df9d8a00 r4:
df9d8a20
[<
c01d0130>] (device_register+0x0/0x24) from [<
c01ef8d4>] (i2c_new_device+0x118/0x180)
r4:
df9d8a20
[<
c01ef7bc>] (i2c_new_device+0x0/0x180) from [<
c01efc88>] (i2c_register_adapter+0x140/0x204)
r8:
c03cd970 r7:
00000000 r6:
df8f0070 r5:
df8a6300 r4:
df8f0048
[<
c01efb48>] (i2c_register_adapter+0x0/0x204) from [<
c01efe9c>] (i2c_add_numbered_adapter+0xb4/0xcc)
r8:
df8a4c54 r7:
df8cae00 r6:
df843e2c r5:
df8f0048 r4:
00000000
[<
c01efde8>] (i2c_add_numbered_adapter+0x0/0xcc) from [<
c029ce1c>] (omap_i2c_probe+0x2f8/0x3b4)
r6:
00000000 r5:
df8f0000 r4:
df8f0070
[<
c029cb24>] (omap_i2c_probe+0x0/0x3b4) from [<
c01d3484>] (platform_drv_probe+0x20/0x24)
[<
c01d3464>] (platform_drv_probe+0x0/0x24) from [<
c01d1f34>] (really_probe+0xa0/0x178)
[<
c01d1e94>] (really_probe+0x0/0x178) from [<
c01d205c>] (driver_probe_device+0x50/0x68)
r7:
df843ef0 r6:
c03cdb2c r5:
c03cdb2c r4:
df8cae08
[<
c01d200c>] (driver_probe_device+0x0/0x68) from [<
c01d20e0>] (__driver_attach+0x6c/0x90)
r5:
df8cae3c r4:
df8cae08
[<
c01d2074>] (__driver_attach+0x0/0x90) from [<
c01d08d8>] (bus_for_each_dev+0x58/0x98)
r6:
c03cdb2c r5:
c01d2074 r4:
00000000
[<
c01d0880>] (bus_for_each_dev+0x0/0x98) from [<
c01d1d80>] (driver_attach+0x20/0x28)
r7:
df880b80 r6:
c03cdb2c r5:
c03cdb2c r4:
c0394f28
[<
c01d1d60>] (driver_attach+0x0/0x28) from [<
c01d115c>] (bus_add_driver+0xb4/0x230)
[<
c01d10a8>] (bus_add_driver+0x0/0x230) from [<
c01d278c>] (driver_register+0xc8/0x154)
[<
c01d26c4>] (driver_register+0x0/0x154) from [<
c01d37e4>] (platform_driver_register+0x4c/0x60)
r8:
00000000 r7:
00000013 r6:
c00384c8 r5:
c0395180 r4:
c0394f28
[<
c01d3798>] (platform_driver_register+0x0/0x60) from [<
c038626c>] (omap_i2c_init_driver+0x14/0x1c)
[<
c0386258>] (omap_i2c_init_driver+0x0/0x1c) from [<
c00087b8>] (do_one_initcall+0x9c/0x164)
[<
c000871c>] (do_one_initcall+0x0/0x164) from [<
c036c2f4>] (kernel_init+0x90/0x138)
[<
c036c264>] (kernel_init+0x0/0x138) from [<
c00384c8>] (do_exit+0x0/0x2ec)
r5:
c036c264 r4:
00000000
<0>Code:
e24dd004 e5903014 e1a04000 e5905010 (
e5933000)
<4>---[ end trace
1b75b31a2719ed1c ]---
This happens because we try to register an IRQ domain with a NULL ops
structure, and the first thing irq_domain_add() does is try to
dereference this ops structure.
So, fix the problem by getting rid of the incorrect OF_IRQ ifdef and
wrapping the IRQ domain bits of the driver with an IRQ_DOMAIN ifdef
instead.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Tue, 7 Feb 2012 09:44:55 +0000 (09:44 +0000)]
ARM: omap: fix oops in drivers/video/omap2/dss/dpi.c
When a PMIC is not found, this driver is unable to obtain its
'vdds_dsi_reg' regulator. Even through its initialization function
fails, other code still calls its enable function, which fails to
check whether it has this regulator before asking for it to be enabled.
This fixes the oops, however a better fix would be to sort out the
upper layers to prevent them calling into a module which failed to
initialize.
Unable to handle kernel NULL pointer dereference at virtual address
00000038
pgd =
c0004000
[
00000038] *pgd=
00000000
Internal error: Oops: 5 [#1] PREEMPT
Modules linked in:
CPU: 0 Not tainted (3.3.0-rc2+ #228)
PC is at regulator_enable+0x10/0x70
LR is at omapdss_dpi_display_enable+0x54/0x15c
pc : [<
c01b9a08>] lr : [<
c01af994>] psr:
60000013
sp :
c181fd90 ip :
c181fdb0 fp :
c181fdac
r10:
c042eff0 r9 :
00000060 r8 :
c044a164
r7 :
c042c0e4 r6 :
c042bd60 r5 :
00000000 r4 :
c042bd60
r3 :
c084de48 r2 :
c181e000 r1 :
c042bd60 r0 :
00000000
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
Control:
10c5387d Table:
80004019 DAC:
00000015
Process swapper (pid: 1, stack limit = 0xc181e2e8)
Stack: (0xc181fd90 to 0xc1820000)
fd80:
c001754c c042bd60 00000000 c042bd60
fda0:
c181fdcc c181fdb0 c01af994 c01b9a04 c0016104 c042bd60 c042bd60 c044a338
fdc0:
c181fdec c181fdd0 c01b5ed0 c01af94c c042bd60 c042bd60 c1aa8000 c1aa8a0c
fde0:
c181fe04 c181fdf0 c01b5f54 c01b5ea8 c02fc18c c042bd60 c181fe3c c181fe08
fe00:
c01b2a18 c01b5f48 c01aed14 c02fc160 c01df8ec 00000002 c042bd60 00000003
fe20:
c042bd60 c1aa8000 c1aa8a0c c042eff8 c181fe84 c181fe40 c01b3874 c01b29fc
fe40:
c042eff8 00000000 c042f000 c0449db8 c044ed78 00000000 c181fe74 c042eff8
fe60:
c042eff8 c0449db8 c0449db8 c044ed78 00000000 00000000 c181fe94 c181fe88
fe80:
c01e452c c01b35e8 c181feb4 c181fe98 c01e2fdc c01e4518 c042eff8 c0449db8
fea0:
c0449db8 c181fef0 c181fecc c181feb8 c01e3104 c01e2f48 c042eff8 c042f02c
fec0:
c181feec c181fed0 c01e3190 c01e30c0 c01e311c 00000000 c01e311c c0449db8
fee0:
c181ff14 c181fef0 c01e1998 c01e3128 c18330a8 c1892290 c04165e8 c0449db8
ff00:
c0449db8 c1ab60c0 c181ff24 c181ff18 c01e2e28 c01e194c c181ff54 c181ff28
ff20:
c01e2218 c01e2e14 c039afed c181ff38 c04165e8 c041660c c0449db8 00000013
ff40:
00000000 c03ffdb8 c181ff7c c181ff58 c01e384c c01e217c c181ff7c c04165e8
ff60:
c041660c c003a37c 00000013 00000000 c181ff8c c181ff80 c01e488c c01e3790
ff80:
c181ff9c c181ff90 c03ffdcc c01e484c c181ffdc c181ffa0 c0008798 c03ffdc4
ffa0:
c181ffc4 c181ffb0 c0056440 c0187810 c003a37c c04165e8 c041660c c003a37c
ffc0:
00000013 00000000 00000000 00000000 c181fff4 c181ffe0 c03ea284 c0008708
ffe0:
00000000 c03ea208 00000000 c181fff8 c003a37c c03ea214 1073cec0 01f7ee08
Backtrace:
[<
c01b99f8>] (regulator_enable+0x0/0x70) from [<
c01af994>] (omapdss_dpi_display_enable+0x54/0x15c)
r6:
c042bd60 r5:
00000000 r4:
c042bd60
[<
c01af940>] (omapdss_dpi_display_enable+0x0/0x15c) from [<
c01b5ed0>] (generic_dpi_panel_power_on+0x34/0x78)
r6:
c044a338 r5:
c042bd60 r4:
c042bd60
[<
c01b5e9c>] (generic_dpi_panel_power_on+0x0/0x78) from [<
c01b5f54>] (generic_dpi_panel_enable+0x18/0x28)
r7:
c1aa8a0c r6:
c1aa8000 r5:
c042bd60 r4:
c042bd60
[<
c01b5f3c>] (generic_dpi_panel_enable+0x0/0x28) from [<
c01b2a18>] (omapfb_init_display+0x28/0x150)
r4:
c042bd60
[<
c01b29f0>] (omapfb_init_display+0x0/0x150) from [<
c01b3874>] (omapfb_probe+0x298/0x318)
r8:
c042eff8 r7:
c1aa8a0c r6:
c1aa8000 r5:
c042bd60 r4:
00000003
[<
c01b35dc>] (omapfb_probe+0x0/0x318) from [<
c01e452c>] (platform_drv_probe+0x20/0x24)
[<
c01e450c>] (platform_drv_probe+0x0/0x24) from [<
c01e2fdc>] (really_probe+0xa0/0x178)
[<
c01e2f3c>] (really_probe+0x0/0x178) from [<
c01e3104>] (driver_probe_device+0x50/0x68)
r7:
c181fef0 r6:
c0449db8 r5:
c0449db8 r4:
c042eff8
[<
c01e30b4>] (driver_probe_device+0x0/0x68) from [<
c01e3190>] (__driver_attach+0x74/0x98)
r5:
c042f02c r4:
c042eff8
[<
c01e311c>] (__driver_attach+0x0/0x98) from [<
c01e1998>] (bus_for_each_dev+0x58/0x98)
r6:
c0449db8 r5:
c01e311c r4:
00000000
[<
c01e1940>] (bus_for_each_dev+0x0/0x98) from [<
c01e2e28>] (driver_attach+0x20/0x28)
r7:
c1ab60c0 r6:
c0449db8 r5:
c0449db8 r4:
c04165e8
[<
c01e2e08>] (driver_attach+0x0/0x28) from [<
c01e2218>] (bus_add_driver+0xa8/0x22c)
[<
c01e2170>] (bus_add_driver+0x0/0x22c) from [<
c01e384c>] (driver_register+0xc8/0x154)
[<
c01e3784>] (driver_register+0x0/0x154) from [<
c01e488c>] (platform_driver_register+0x4c/0x60)
r8:
00000000 r7:
00000013 r6:
c003a37c r5:
c041660c r4:
c04165e8
[<
c01e4840>] (platform_driver_register+0x0/0x60) from [<
c03ffdcc>] (omapfb_init+0x14/0x34)
[<
c03ffdb8>] (omapfb_init+0x0/0x34) from [<
c0008798>] (do_one_initcall+0x9c/0x164)
[<
c00086fc>] (do_one_initcall+0x0/0x164) from [<
c03ea284>] (kernel_init+0x7c/0x120)
[<
c03ea208>] (kernel_init+0x0/0x120) from [<
c003a37c>] (do_exit+0x0/0x2d8)
r5:
c03ea208 r4:
00000000
Code:
e1a0c00d e92dd870 e24cb004 e24dd004 (
e5906038)
---[ end trace
9e2474c2e193b223 ]---
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Russell King [Tue, 7 Feb 2012 09:42:11 +0000 (09:42 +0000)]
ARM: omap: fix oops in arch/arm/mach-omap2/vp.c when pmic is not found
When the PMIC is not found, voltdm->pmic will be NULL. vp.c's
initialization function tries to dereferences this, which causes an
oops:
Unable to handle kernel NULL pointer dereference at virtual address
00000000
pgd =
c0004000
[
00000000] *pgd=
00000000
Internal error: Oops: 5 [#1] PREEMPT
Modules linked in:
CPU: 0 Not tainted (3.3.0-rc2+ #204)
PC is at omap_vp_init+0x5c/0x15c
LR is at omap_vp_init+0x58/0x15c
pc : [<
c03db880>] lr : [<
c03db87c>] psr:
60000013
sp :
c181ff30 ip :
c181ff68 fp :
c181ff64
r10:
c0407808 r9 :
c040786c r8 :
c0407814
r7 :
c0026868 r6 :
c00264fc r5 :
c040ad6c r4 :
00000000
r3 :
00000040 r2 :
000032c8 r1 :
0000fa00 r0 :
000032c8
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
Control:
10c5387d Table:
80004019 DAC:
00000015
Process swapper (pid: 1, stack limit = 0xc181e2e8)
Stack: (0xc181ff30 to 0xc1820000)
ff20:
c0381d00 c02e9c6d c0383582 c040786c
ff40:
c040ad6c c00264fc c0026868 c0407814 00000000 c03d9de4 c181ff8c c181ff68
ff60:
c03db448 c03db830 c02e982c c03fdfb8 c03fe004 c0039988 00000013 00000000
ff80:
c181ff9c c181ff90 c03d9df8 c03db390 c181ffdc c181ffa0 c0008798 c03d9df0
ffa0:
c181ffc4 c181ffb0 c0055a44 c0187050 c0039988 c03fdfb8 c03fe004 c0039988
ffc0:
00000013 00000000 00000000 00000000 c181fff4 c181ffe0 c03d1284 c0008708
ffe0:
00000000 c03d1208 00000000 c181fff8 c0039988 c03d1214 1077ce40 01f7ee08
Backtrace:
[<
c03db824>] (omap_vp_init+0x0/0x15c) from [<
c03db448>] (omap_voltage_late_init+0xc4/0xfc)
[<
c03db384>] (omap_voltage_late_init+0x0/0xfc) from [<
c03d9df8>] (omap2_common_pm_late_init+0x14/0x54)
r8:
00000000 r7:
00000013 r6:
c0039988 r5:
c03fe004 r4:
c03fdfb8
[<
c03d9de4>] (omap2_common_pm_late_init+0x0/0x54) from [<
c0008798>] (do_one_initcall+0x9c/0x164)
[<
c00086fc>] (do_one_initcall+0x0/0x164) from [<
c03d1284>] (kernel_init+0x7c/0x120)
[<
c03d1208>] (kernel_init+0x0/0x120) from [<
c0039988>] (do_exit+0x0/0x2cc)
r5:
c03d1208 r4:
00000000
Code:
e5ca300b e5900034 ebf69027 e5994024 (
e5941000)
---[ end trace
aed617dddaf32c3d ]---
Kernel panic - not syncing: Attempted to kill init!
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Stephen Boyd [Tue, 7 Feb 2012 18:42:33 +0000 (19:42 +0100)]
ARM: 7322/1: Print BUG instead of undefined instruction on BUG_ON()
The ARM kernel uses undefined instructions to implement
BUG/BUG_ON(). This leads to problems where people don't read one
line above the Oops message and see the "kernel BUG at ..."
message and so they wrongly assume the kernel has hit an
undefined instruction.
Instead of printing:
Internal error: Oops - undefined instruction: 0 [#1] PREEMPT SMP
print
Internal error: Oops - BUG: 0 [#1] PREEMPT SMP
This should prevent people from thinking the BUG_ON was an
undefined instruction when it was actually intentional.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Simon Glass <sjg@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Stephen Boyd [Tue, 7 Feb 2012 18:42:07 +0000 (19:42 +0100)]
ARM: 7321/1: cache-v7: Disable preemption when reading CCSIDR
armv7's flush_cache_all() flushes caches via set/way. To
determine the cache attributes (line size, number of sets,
etc.) the assembly first writes the CSSELR register to select a
cache level and then reads the CCSIDR register. The CSSELR register
is banked per-cpu and is used to determine which cache level CCSIDR
reads. If the task is migrated between when the CSSELR is written and
the CCSIDR is read the CCSIDR value may be for an unexpected cache
level (for example L1 instead of L2) and incorrect cache flushing
could occur.
Disable interrupts across the write and read so that the correct
cache attributes are read and used for the cache flushing
routine. We disable interrupts instead of disabling preemption
because the critical section is only 3 instructions and we want
to call v7_dcache_flush_all from __v7_setup which doesn't have a
full kernel stack with a struct thread_info.
This fixes a problem we see in scm_call() when flush_cache_all()
is called from preemptible context and sometimes the L2 cache is
not properly flushed out.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Marc Zyngier [Tue, 7 Feb 2012 01:46:38 +0000 (02:46 +0100)]
ARM: 7320/1: Fix proc_info table alignment
With an admittedly exotic choice of configuration options
(CC_OPTIMIZE_FOR_SIZE, THUMB2, some other size-minimizing ones)
and compiler, the proc_info table can end up being misaligned,
and the kernel being unbootable (Error: unrecognized/unsupported
processor variant).
Forcing the alignement to 4 bytes in the linker script fixes the
issue.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
John Fastabend [Sat, 28 Jan 2012 03:32:17 +0000 (03:32 +0000)]
ixgbe: ethtool: stats user buffer overrun
If the number of tx/rx queues changes the ethtool ioctl
ETHTOOL_GSTATS may overrun the userspace buffer. This
occurs because the general practice in user space to
query stats is to issue a ETHTOOL_GSSET cmd to learn the
buffer size needed, allocate the buffer, then call
ETHTOOL_GSTIRNGS and ETHTOOL_GSTATS. If the number of
real_num_queues is changed or flow control attributes
are changed after ETHTOOL_GSSET but before the
ETHTOOL_GSTRINGS/ETHTOOL_GSTATS a user space buffer
overrun occurs.
To fix the overrun always return the max buffer size
needed from get_sset_count() then return all strings
and stats from get_strings()/get_ethtool_stats().
This _will_ change the output from the ioctl() call
which could break applications and script parsing in
theory. I believe these changes should not break existing
tools because the only changes will be more {tx|rx}_queues
and the {tx|rx}_pb_* stats will always be returned.
Existing scripts already need to handle changing number
of queues because this occurs today depending on system
and current features. The {tx|rx}_pb_* stats are at the
end of the output and should be handled by scripts today
regardless.
Finally get_ethtool_stats and get_strings are free-form
outputs tools parsing these outputs should be defensive
anyways. In the end these updates are better then
having a tool segfault because of a buffer overrun.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
John Fastabend [Sat, 28 Jan 2012 01:22:35 +0000 (01:22 +0000)]
ixgbe: dcb: up2tc mapping lost on disable/enable CEE DCB state
Users expect the up2tc mapping to be maintained across a DCB
enable/disable/enable transition. And since we maintain all
the other DCB attributes we should do this for up2tc mappings
as well just to be consistent. Also without this we break
user space applications that expect this to occur that
previously worked.
Signed-off-by: John Fastabend <john.r.fastabend@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Yi Zou [Sat, 7 Jan 2012 08:39:50 +0000 (08:39 +0000)]
ixgbe: do not update real num queues when netdev is going away
If the netdev is already in NETREG_UNREGISTERING/_UNREGISTERED state, do not
update the real num tx queues. netdev_queue_update_kobjects() is already
called via remove_queue_kobjects() at NETREG_UNREGISTERING time. So, when
upper layer driver, e.g., FCoE protocol stack is monitoring the netdev
event of NETDEV_UNREGISTER and calls back to LLD ndo_fcoe_disable() to remove
extra queues allocated for FCoE, the associated txq sysfs kobjects are already
removed, and trying to update the real num queues would cause something like
below:
...
PID: 25138 TASK:
ffff88021e64c440 CPU: 3 COMMAND: "kworker/3:3"
#0 [
ffff88021f007760] machine_kexec at
ffffffff810226d9
#1 [
ffff88021f0077d0] crash_kexec at
ffffffff81089d2d
#2 [
ffff88021f0078a0] oops_end at
ffffffff813bca78
#3 [
ffff88021f0078d0] no_context at
ffffffff81029e72
#4 [
ffff88021f007920] __bad_area_nosemaphore at
ffffffff8102a155
#5 [
ffff88021f0079f0] bad_area_nosemaphore at
ffffffff8102a23e
#6 [
ffff88021f007a00] do_page_fault at
ffffffff813bf32e
#7 [
ffff88021f007b10] page_fault at
ffffffff813bc045
[exception RIP: sysfs_find_dirent+17]
RIP:
ffffffff81178611 RSP:
ffff88021f007bc0 RFLAGS:
00010246
RAX:
ffff88021e64c440 RBX:
ffffffff8156cc63 RCX:
0000000000000004
RDX:
ffffffff8156cc63 RSI:
0000000000000000 RDI:
0000000000000000
RBP:
ffff88021f007be0 R8:
0000000000000004 R9:
0000000000000008
R10:
ffffffff816fed00 R11:
0000000000000004 R12:
0000000000000000
R13:
ffffffff8156cc63 R14:
0000000000000000 R15:
ffff8802222a0000
ORIG_RAX:
ffffffffffffffff CS: 0010 SS: 0018
#8 [
ffff88021f007be8] sysfs_get_dirent at
ffffffff81178c07
#9 [
ffff88021f007c18] sysfs_remove_group at
ffffffff8117ac27
#10 [
ffff88021f007c48] netdev_queue_update_kobjects at
ffffffff813178f9
#11 [
ffff88021f007c88] netif_set_real_num_tx_queues at
ffffffff81303e38
#12 [
ffff88021f007cc8] ixgbe_set_num_queues at
ffffffffa0249763 [ixgbe]
#13 [
ffff88021f007cf8] ixgbe_init_interrupt_scheme at
ffffffffa024ea89 [ixgbe]
#14 [
ffff88021f007d48] ixgbe_fcoe_disable at
ffffffffa0267113 [ixgbe]
#15 [
ffff88021f007d68] vlan_dev_fcoe_disable at
ffffffffa014fef5 [8021q]
#16 [
ffff88021f007d78] fcoe_interface_cleanup at
ffffffffa02b7dfd [fcoe]
#17 [
ffff88021f007df8] fcoe_destroy_work at
ffffffffa02b7f08 [fcoe]
#18 [
ffff88021f007e18] process_one_work at
ffffffff8105d7ca
#19 [
ffff88021f007e68] worker_thread at
ffffffff81060513
#20 [
ffff88021f007ee8] kthread at
ffffffff810648b6
#21 [
ffff88021f007f48] kernel_thread_helper at
ffffffff813c40f4
Signed-off-by: Yi Zou <yi.zou@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Alexander Duyck [Thu, 10 Nov 2011 09:09:17 +0000 (09:09 +0000)]
ixgbe: Fix broken dependency on MAX_SKB_FRAGS being related to page size
This patch fixes an issue in which RSC will generate corrupted frames when
PAGE_SIZE is larger than 8K. Specifically it looks like that in 2.6.39 a
change was made so that GRO would always have at least 16 frags available
for coalescing, but the ixgbe RSC logic was not updated. As such the RSC
feature would generate a frame larger than 64K and then overflow the value
in the IP length field.
To correct that I am now basing things on the PAGE_SIZE.
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Greg Rose [Wed, 25 Jan 2012 07:59:37 +0000 (07:59 +0000)]
ixgbe: Fix case of Tx Hang in PF with 32 VFs
A check for the number of VFs allocated should have used a greater than
equal operator instead of just greater than. This caused allocation of
exactly 32 VFs to not enable the PF transmit and receive enables.
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Robert E Garrett <robertX.e.garrett@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Greg Rose [Fri, 3 Feb 2012 00:54:13 +0000 (00:54 +0000)]
ixgbe: fix vf lookup
Recent addition of code to find already allocated VFs failed to take
account that systems with 2 or more multi-port SR-IOV capable controllers
might have already enabled VFs. Make sure that the VFs the function is
finding are actually subordinate to the particular instance of the adapter
that is looking for them and not subordinate to some device that has
previously enabled SR-IOV.
This bug exists in 3.2 stable as well as 3.3 release candidates.
CC: stable@vger.kernel.org
Reported-by: David Ahern <daahern@cisco.com>
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Robert E Garrett <robertX.e.garrett@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Greg Rose [Thu, 2 Feb 2012 23:51:43 +0000 (23:51 +0000)]
igb: fix vf lookup
Recent addition of code to find already allocated VFs failed to take
account that systems with 2 or more multi-port SR-IOV capable controllers
might have already enabled VFs. Make sure that the VFs the function is
finding are actually subordinate to the particular instance of the adapter
that is looking for them and not subordinate to some device that has
previously enabled SR-IOV.
This is applicable to 3.2+ kernels.
CC: stable@vger.kernel.org
Reported-by: David Ahern <daahern@cisco.com>
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Tested-by: Robert E Garrett <robertX.e.garrett@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Dean Nelson [Thu, 19 Jan 2012 17:47:24 +0000 (17:47 +0000)]
e1000: add dropped DMA receive enable back in for WoL
Commit
d5bc77a223b0e9b9dfb002048d2b34a79e7d0b48 broke Wake-on-LAN by
inadvertently dropping the enabling of DMA receives.
Restore the enabling of DMA receives for WoL.
This is applicable to 3.1+ stable trees.
CC: stable@vger.stable.org
Reported-by: Tobias Klausmann <klausman@schwarzvogel.de>
Signed-off-by: Dean Nelson <dnelson@redhat.com>
Tested-by: Tobias Klausmann <klausman@schwarzvogel.de>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Nikolaus Schulz [Wed, 8 Feb 2012 17:56:10 +0000 (18:56 +0100)]
hwmon: (f75375s) Fix bit shifting in f75375_write16
In order to extract the high byte of the 16-bit word, shift the word to
the right, not to the left.
Signed-off-by: Nikolaus Schulz <mail@microschulz.de>
Cc: stable@kernel.org # 2.6.32+
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Nikolaus Schulz [Wed, 8 Feb 2012 17:56:09 +0000 (18:56 +0100)]
hwmon: (f75375s) Fix reading of wrong register when initializing the F75387
Unlike the other chips supported by this driver, the F75387 stores the
pwm_mode in register F75375_REG_FAN_TIMER, not F75375_REG_CONFIG1.
Signed-off-by: Nikolaus Schulz <mail@microschulz.de>
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Nikolaus Schulz [Wed, 8 Feb 2012 17:56:08 +0000 (18:56 +0100)]
hwmon: (f75375s) Fix automatic pwm mode setting for F75373 & F75375
In order to enable temperature mode aka automatic mode for the F75373 and
F75375 chips, the two FANx_MODE bits in the fan configuration register
need be set to 01, not 10.
Signed-off-by: Nikolaus Schulz <mail@microschulz.de>
Cc: stable@kernel.org # 2.6.32+
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Guenter Roeck [Tue, 7 Feb 2012 09:46:42 +0000 (01:46 -0800)]
hwmon: (w83627ehf) Remove duplicate code
Commit
ec3e5a16446fef1891611fe3bdfa5954d1ddf5e4 slipped in some duplicate code.
Remove it.
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Linus Torvalds [Thu, 9 Feb 2012 03:21:53 +0000 (19:21 -0800)]
Linux 3.3-rc3
Linus Torvalds [Thu, 9 Feb 2012 03:11:00 +0000 (19:11 -0800)]
Merge branch 'iommu/fixes' of git://git./linux/kernel/git/joro/iommu
One patch fixes an bug in the ARM/MSM IOMMU code which returned sucess
in the unmap function even when an error occured and the other patch
adds a workaround into the AMD IOMMU driver to better handle broken IVRS
ACPI tables (this patch fixes the case when a device is not listed in
the table but actually translated by the iommu).
* 'iommu/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/msm: Fix error handling in msm_iommu_unmap()
iommu/amd: Work around broken IVRS tables
Linus Torvalds [Thu, 9 Feb 2012 03:09:25 +0000 (19:09 -0800)]
Merge branch '3.3-rc-fixes' of git://git./linux/kernel/git/nab/target-pending
This series contains pending target bug-fixes and cleanups for v3.3-rc3
that have been addressed the past weeks in lio-core.git.
Some of the highlights include:
- Fix handling for control CDBs with data greater than PAGE_SIZE (andy)
- Use IP_FREEBIND for iscsi-target to address network portal creation
issues with systemd (dax)
- Allow PERSISTENT RESERVE IN for non-reservation holder (marco)
- Fix iblock se_dev_attrib.unmap_granularity (marco)
- Fix unsupported WRITE_SAME sense payload handling (martin)
- Add workaround for zero-length control CDB handling (nab)
- Fix discovery with INADDR_ANY and IN6ADDR_ANY_INIT (nab)
- Fix target_submit_cmd() exception handling (nab)
- Return correct ASC for unimplemented VPD pages (roland)
- Don't zero pages used for data buffers (roland)
- Fix return code of core_tpg_.*_lun (sebastian)
* '3.3-rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (26 commits)
target: Fix unsupported WRITE_SAME sense payload
iscsi: use IP_FREEBIND socket option
iblock: fix handling of large requests
target: handle empty string writes in sysfs
iscsi_target: in_aton needs linux/inet.h
target: Fix iblock se_dev_attrib.unmap_granularity
target: Fix target_submit_cmd() exception handling
target: Change target_submit_cmd() to return void
target: accept REQUEST_SENSE with 18bytes
target: Fail INQUIRY commands with EVPD==0 but PAGE CODE!=0
target: Return correct ASC for unimplemented VPD pages
iscsi-target: Fix discovery with INADDR_ANY and IN6ADDR_ANY_INIT
target: Allow control CDBs with data > 1 page
iscsi-target: Fix up a few assignments
iscsi-target: make one-bit bitfields unsigned
iscsi-target: Fix double list_add with iscsit_alloc_buffs reject
iscsi-target: Fix reject release handling in iscsit_free_cmd()
target: fix return code of core_tpg_.*_lun
target: use save/restore lock primitive in core_dec_lacl_count()
target: avoid multiple outputs in scsi_dump_inquiry()
...
Linus Torvalds [Thu, 9 Feb 2012 03:06:30 +0000 (19:06 -0800)]
Merge tag 'md-3.3-fixes' of git://neil.brown.name/md
Some simple md-related fixes.
1/ two small fixes to ensure we handle an interrupted resync properly.
2/ avoid loading the bitmap multiple times in dm-raid
* tag 'md-3.3-fixes' of git://neil.brown.name/md:
md: two small fixes to handling interrupt resync.
Prevent DM RAID from loading bitmap twice.
Linus Torvalds [Thu, 9 Feb 2012 03:05:47 +0000 (19:05 -0800)]
Merge tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6
SPI bug fixes for v3.3-rc2
Minor SPI device driver changes. A rename of the pch_spi_pcidev symbol
that merely eliminates a modpost warning, and a Kconfig change to allow
the Samsung spi driver to build on EXYNOS.
* tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6:
spi-topcliff-pch: rename pch_spi_pcidev to pch_spi_pcidev_driver
spi: Add spi-s3c64xx driver dependency on ARCH_EXYNOS4
Linus Torvalds [Thu, 9 Feb 2012 03:04:47 +0000 (19:04 -0800)]
Merge branch 'akpm' (Andrew's tree)
Five fixes
* branch 'akpm':
pcmcia: fix socket refcount decrementing on each resume
mm: fix UP THP spin_is_locked BUGs
drivers/leds/leds-lm3530.c: fix setting pltfm->als_vmax
mm: compaction: check for overlapping nodes during isolation for migration
nilfs2: avoid overflowing segment numbers in nilfs_ioctl_clean_segments()
Russell King [Thu, 9 Feb 2012 01:13:41 +0000 (17:13 -0800)]
pcmcia: fix socket refcount decrementing on each resume
This fixes a memory-corrupting bug: not only does it cause the warning,
but as a result of dropping the refcount to zero, it causes the
pcmcia_socket0 device structure to be freed while it still has
references, causing slab caches corruption. A fatal oops quickly
follows this warning - often even just a 'dmesg' following the warning
causes the kernel to oops.
While testing suspend/resume on an ARM device with PCMCIA support, and a
CF card inserted, I found that after five suspend and resumes, the
kernel would complain, and shortly die after with slab corruption.
WARNING: at include/linux/kref.h:41 kobject_get+0x28/0x50()
As the message doesn't give a clue about which kobject, and the built-in
debugging in drivers/base/power/main.c happens too late, this was added
right before each get_device():
printk("%s: %p [%s] %u\n", __func__, dev, kobject_name(&dev->kobj), atomic_read(&dev->kobj.kref.refcount));
and on the 3rd s2ram cycle, the following behaviour observed:
On the 3rd suspend/resume cycle:
dpm_prepare:
c1a0d998 [pcmcia_socket0] 3
dpm_suspend:
c1a0d998 [pcmcia_socket0] 3
dpm_suspend_noirq:
c1a0d998 [pcmcia_socket0] 3
dpm_resume_noirq:
c1a0d998 [pcmcia_socket0] 3
dpm_resume:
c1a0d998 [pcmcia_socket0] 3
dpm_complete:
c1a0d998 [pcmcia_socket0] 2
4th:
dpm_prepare:
c1a0d998 [pcmcia_socket0] 2
dpm_suspend:
c1a0d998 [pcmcia_socket0] 2
dpm_suspend_noirq:
c1a0d998 [pcmcia_socket0] 2
dpm_resume_noirq:
c1a0d998 [pcmcia_socket0] 2
dpm_resume:
c1a0d998 [pcmcia_socket0] 2
dpm_complete:
c1a0d998 [pcmcia_socket0] 1
5th:
dpm_prepare:
c1a0d998 [pcmcia_socket0] 1
dpm_suspend:
c1a0d998 [pcmcia_socket0] 1
dpm_suspend_noirq:
c1a0d998 [pcmcia_socket0] 1
dpm_resume_noirq:
c1a0d998 [pcmcia_socket0] 1
dpm_resume:
c1a0d998 [pcmcia_socket0] 1
dpm_complete:
c1a0d998 [pcmcia_socket0] 0
------------[ cut here ]------------
WARNING: at include/linux/kref.h:41 kobject_get+0x28/0x50()
Modules linked in: ucb1x00_core
Backtrace:
[<
c0212090>] (dump_backtrace+0x0/0x110) from [<
c04799dc>] (dump_stack+0x18/0x1c)
[<
c04799c4>] (dump_stack+0x0/0x1c) from [<
c021cba0>] (warn_slowpath_common+0x50/0x68)
[<
c021cb50>] (warn_slowpath_common+0x0/0x68) from [<
c021cbdc>] (warn_slowpath_null+0x24/0x28)
[<
c021cbb8>] (warn_slowpath_null+0x0/0x28) from [<
c0335374>] (kobject_get+0x28/0x50)
[<
c033534c>] (kobject_get+0x0/0x50) from [<
c03804f4>] (get_device+0x1c/0x24)
[<
c0388c90>] (dpm_complete+0x0/0x1a0) from [<
c0389cc0>] (dpm_resume_end+0x1c/0x20)
...
Looking at commit
7b24e7988263 ("pcmcia: split up central event handler"),
the following change was made to cs.c:
return 0;
}
#endif
-
- send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW);
+ if (!(skt->state & SOCKET_CARDBUS) && (skt->callback))
+ skt->callback->early_resume(skt);
return 0;
}
And the corresponding change in ds.c is from:
-static int ds_event(struct pcmcia_socket *skt, event_t event, int priority)
-{
- struct pcmcia_socket *s = pcmcia_get_socket(skt);
...
- switch (event) {
...
- case CS_EVENT_PM_RESUME:
- if (verify_cis_cache(skt) != 0) {
- dev_dbg(&skt->dev, "cis mismatch - different card\n");
- /* first, remove the card */
- ds_event(skt, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH);
- mutex_lock(&s->ops_mutex);
- destroy_cis_cache(skt);
- kfree(skt->fake_cis);
- skt->fake_cis = NULL;
- s->functions = 0;
- mutex_unlock(&s->ops_mutex);
- /* now, add the new card */
- ds_event(skt, CS_EVENT_CARD_INSERTION,
- CS_EVENT_PRI_LOW);
- }
- break;
...
- }
- pcmcia_put_socket(s);
- return 0;
-} /* ds_event */
to:
+static int pcmcia_bus_early_resume(struct pcmcia_socket *skt)
+{
+ if (!verify_cis_cache(skt)) {
+ pcmcia_put_socket(skt);
+ return 0;
+ }
+ dev_dbg(&skt->dev, "cis mismatch - different card\n");
+ /* first, remove the card */
+ pcmcia_bus_remove(skt);
+ mutex_lock(&skt->ops_mutex);
+ destroy_cis_cache(skt);
+ kfree(skt->fake_cis);
+ skt->fake_cis = NULL;
+ skt->functions = 0;
+ mutex_unlock(&skt->ops_mutex);
+ /* now, add the new card */
+ pcmcia_bus_add(skt);
+ return 0;
+}
As can be seen, the original function called pcmcia_get_socket() and
pcmcia_put_socket() around the guts, whereas the replacement code
calls pcmcia_put_socket() only in one path. This creates an imbalance
in the refcounting.
Testing with pcmcia_put_socket() put removed shows that the bug is gone:
dpm_suspend:
c1a10998 [pcmcia_socket0] 5
dpm_suspend_noirq:
c1a10998 [pcmcia_socket0] 5
dpm_resume_noirq:
c1a10998 [pcmcia_socket0] 5
dpm_resume:
c1a10998 [pcmcia_socket0] 5
dpm_complete:
c1a10998 [pcmcia_socket0] 5
Tested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Hugh Dickins [Thu, 9 Feb 2012 01:13:40 +0000 (17:13 -0800)]
mm: fix UP THP spin_is_locked BUGs
Fix CONFIG_TRANSPARENT_HUGEPAGE=y CONFIG_SMP=n CONFIG_DEBUG_VM=y
CONFIG_DEBUG_SPINLOCK=n kernel: spin_is_locked() is then always false,
and so triggers some BUGs in Transparent HugePage codepaths.
asm-generic/bug.h mentions this problem, and provides a WARN_ON_SMP(x);
but being too lazy to add VM_BUG_ON_SMP, BUG_ON_SMP, WARN_ON_SMP_ONCE,
VM_WARN_ON_SMP_ONCE, just test NR_CPUS != 1 in the existing VM_BUG_ONs.
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Axel Lin [Thu, 9 Feb 2012 01:13:39 +0000 (17:13 -0800)]
drivers/leds/leds-lm3530.c: fix setting pltfm->als_vmax
In current code, pltfm->als_vmin is set to LM3530_ALS_WINDOW_mV and
pltfm->als_vmax is 0. This does not make sense. I think what we want
here is setting pltfm->als_vmax to LM3530_ALS_WINDOW_mV.
Both als_vmin and als_vmax local variables will be set to
pltfm->als_vmin and pltfm->als_vmax by a few lines latter. Thus also
remove a redundant assignment for als_vmin and als_vmax in this patch.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>
Acked-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Tested-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Mel Gorman [Thu, 9 Feb 2012 01:13:38 +0000 (17:13 -0800)]
mm: compaction: check for overlapping nodes during isolation for migration
When isolating pages for migration, migration starts at the start of a
zone while the free scanner starts at the end of the zone. Migration
avoids entering a new zone by never going beyond the free scanned.
Unfortunately, in very rare cases nodes can overlap. When this happens,
migration isolates pages without the LRU lock held, corrupting lists
which will trigger errors in reclaim or during page free such as in the
following oops
BUG: unable to handle kernel NULL pointer dereference at
0000000000000008
IP: [<
ffffffff810f795c>] free_pcppages_bulk+0xcc/0x450
PGD
1dda554067 PUD
1e1cb58067 PMD 0
Oops: 0000 [#1] SMP
CPU 37
Pid: 17088, comm: memcg_process_s Tainted: G X
RIP: free_pcppages_bulk+0xcc/0x450
Process memcg_process_s (pid: 17088, threadinfo
ffff881c2926e000, task
ffff881c2926c0c0)
Call Trace:
free_hot_cold_page+0x17e/0x1f0
__pagevec_free+0x90/0xb0
release_pages+0x22a/0x260
pagevec_lru_move_fn+0xf3/0x110
putback_lru_page+0x66/0xe0
unmap_and_move+0x156/0x180
migrate_pages+0x9e/0x1b0
compact_zone+0x1f3/0x2f0
compact_zone_order+0xa2/0xe0
try_to_compact_pages+0xdf/0x110
__alloc_pages_direct_compact+0xee/0x1c0
__alloc_pages_slowpath+0x370/0x830
__alloc_pages_nodemask+0x1b1/0x1c0
alloc_pages_vma+0x9b/0x160
do_huge_pmd_anonymous_page+0x160/0x270
do_page_fault+0x207/0x4c0
page_fault+0x25/0x30
The "X" in the taint flag means that external modules were loaded but but
is unrelated to the bug triggering. The real problem was because the PFN
layout looks like this
Zone PFN ranges:
DMA 0x00000010 -> 0x00001000
DMA32 0x00001000 -> 0x00100000
Normal 0x00100000 -> 0x01e80000
Movable zone start PFN for each node
early_node_map[14] active PFN ranges
0: 0x00000010 -> 0x0000009b
0: 0x00000100 -> 0x0007a1ec
0: 0x0007a354 -> 0x0007a379
0: 0x0007f7ff -> 0x0007f800
0: 0x00100000 -> 0x00680000
1: 0x00680000 -> 0x00e80000
0: 0x00e80000 -> 0x01080000
1: 0x01080000 -> 0x01280000
0: 0x01280000 -> 0x01480000
1: 0x01480000 -> 0x01680000
0: 0x01680000 -> 0x01880000
1: 0x01880000 -> 0x01a80000
0: 0x01a80000 -> 0x01c80000
1: 0x01c80000 -> 0x01e80000
The fix is straight-forward. isolate_migratepages() has to make a
similar check to isolate_freepage to ensure that it never isolates pages
from a zone it does not hold the LRU lock for.
This was discovered in a 3.0-based kernel but it affects 3.1.x, 3.2.x
and current mainline.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Xi Wang [Thu, 9 Feb 2012 01:13:37 +0000 (17:13 -0800)]
nilfs2: avoid overflowing segment numbers in nilfs_ioctl_clean_segments()
nsegs is read from userspace. Limit its value and avoid overflowing nsegs
* sizeof(__u64) in the subsequent call to memdup_user().
This patch complements
481fe17e973fb9 ("nilfs2: potential integer overflow
in nilfs_ioctl_clean_segments()").
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Cc: Haogang Chen <haogangchen@gmail.com>
Acked-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Evgeniy Polyakov [Wed, 8 Feb 2012 23:44:50 +0000 (02:44 +0300)]
staging: pohmelfs: remove drivers/staging/pohmelfs
New pohmelfs is coming, and it is time to remove deadly old design
https://lkml.org/lkml/2012/2/8/293
Signed-off-by: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David S. Miller [Thu, 9 Feb 2012 00:12:12 +0000 (19:12 -0500)]
Merge branch 'for-davem' of git://git./linux/kernel/git/linville/wireless
Eric Dumazet [Wed, 8 Feb 2012 08:51:50 +0000 (08:51 +0000)]
gro: more generic L2 header check
Shlomo Pongratz reported GRO L2 header check was suited for Ethernet
only, and failed on IB/ipoib traffic.
He provided a patch faking a zeroed header to let GRO aggregates frames.
Roland Dreier, Herbert Xu, and others suggested we change GRO L2 header
check to be more generic, ie not assuming L2 header is 14 bytes, but
taking into account hard_header_len.
__napi_gro_receive() has special handling for the common case (Ethernet)
to avoid a memcmp() call and use an inline optimized function instead.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Reported-by: Shlomo Pongratz <shlomop@mellanox.com>
Cc: Roland Dreier <roland@kernel.org>
Cc: Or Gerlitz <ogerlitz@mellanox.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Tested-by: Sean Hefty <sean.hefty@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Roland Dreier [Tue, 7 Feb 2012 14:51:21 +0000 (14:51 +0000)]
IPoIB: Stop lying about hard_header_len and use skb->cb to stash LL addresses
Commit
a0417fa3a18a ("net: Make qdisc_skb_cb upper size bound
explicit.") made it possible for a netdev driver to use skb->cb
between its header_ops.create method and its .ndo_start_xmit
method. Use this in ipoib_hard_header() to stash away the LL address
(GID + QPN), instead of the "ipoib_pseudoheader" hack. This allows
IPoIB to stop lying about its hard_header_len, which will let us fix
the L2 check for GRO.
Signed-off-by: Roland Dreier <roland@purestorage.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Greg Kroah-Hartman [Wed, 8 Feb 2012 23:11:17 +0000 (15:11 -0800)]
driver-core: cpu: fix kobject warning when hotplugging a cpu
Due to the sysdev conversion to struct device, the cpu objects get
reused when adding a cpu after offlining it, which causes a big warning
that the kobject portion is not properly initialized.
So clear out the object before we register it again, so all is quiet.
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Yinghai Lu [Tue, 7 Feb 2012 16:20:37 +0000 (08:20 -0800)]
ACPI: remove duplicated lines of merging problems with acpi_processor_add
Those lines have two copies.
Not sure how it could happen, looks like git problem.
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Gortmaker [Wed, 8 Feb 2012 14:05:42 +0000 (09:05 -0500)]
m32r: relocate drivers back out of 8250 dir
Commit
9bef3d4197379a995fa80f81950bbbf8d32e9e8b
"serial: group all the 8250 related code together"
inadvertently swept up the m32r driver in the move, because
it had comments mentioning 8250 registers within it. However
these are only there by nature of the driver being based off
the 8250 source code -- the hardware itself does not actually
have any relation to the original 8250 style UARTs.
Reported-by: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linus Torvalds [Wed, 8 Feb 2012 22:56:39 +0000 (14:56 -0800)]
Merge tag 'sound-fixes' of git://git./linux/kernel/git/tiwai/sound
sound fixes #2 for 3.3-rc3
A collection of small fixes, mostly for regressions.
In addition, a few ASoC wm8994 updates are included, too.
* tag 'sound-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ASoC: wm8994: Disable line output discharge prior to ramping VMID
ASoC: wm8994: Fix typo in VMID ramp setting
ALSA: oxygen, virtuoso: fix exchanged L/R volumes of aux and CD inputs
ALSA: usb-audio: add Edirol UM-3G support
ALSA: hda - add support for Uniwill ECS M31EI notebook
ALSA: hda - Fix error handling in patch_ca0132.c
ASoC: wm8994: Enabling VMID should take a runtime PM reference
ALSA: hda/realtek - Fix a wrong condition
ALSA: emu8000: Remove duplicate linux/moduleparam.h include from emu8000_patch.c
ALSA: hda/realtek - Add missing Bass and CLFE as vmaster slaves
ASoC: wm_hubs: Correct line input to line output 2 paths
ASoC: cs42l73: Fix Output [X|A|V]SP_SCLK Sourcing Mode setting for master mode
ASoC: wm8962: Fix word length configuration
ASoC: core: Better support for idle_bias_off suspend ignores
ASoC: wm8994: Remove ASoC level register cache sync
ASoC: wm_hubs: Fix routing of input PGAs to line output mixer
Anton Vorontsov [Tue, 7 Feb 2012 05:13:27 +0000 (09:13 +0400)]
staging: android/ram_console: Don't build on arches w/o ioremap
This patch fixes UML build:
CC drivers/staging/android/ram_console.o
drivers/staging/android/ram_console.c: In function
'ram_console_driver_probe':
drivers/staging/android/ram_console.c:358:2: error: implicit declaration
of function 'ioremap' [-Werror=implicit-function-declaration]
cc1: some warnings being treated as errors
make[3]: *** [drivers/staging/android/ram_console.o] Error 1
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Larry Finger [Mon, 6 Feb 2012 03:12:26 +0000 (21:12 -0600)]
staging: r8712u: Use asynchronous firmware loading
In https://bugs.archlinux.org/task/27996, failure of driver r8712u is
reported, with a timeout during module loading due to synchronous loading
of the firmware. The code now uses request_firmware_nowait().
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bart Westgeest [Wed, 25 Jan 2012 18:46:32 +0000 (13:46 -0500)]
staging: usbip: fix to prevent potentially using uninitialized spinlock
The stub_probe function can be called as soon as the stub_driver is
registered. This can lead to the busid_table_lock being used before it
is initialized. Moved calling the init_busid_table function (which
initalizes this spinlock) to be called earlier in the init function to
prevent this from happening.
Signed-off-by: Bart Westgeest <bart@elbrys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Larry Finger [Fri, 3 Feb 2012 22:05:13 +0000 (16:05 -0600)]
staging: r8712u: Fix problem when CONFIG_R8712_AP is set
When this driver was upgraded to the vendor
20100831 version in
commit
93c55dda092c7 et al,, one listhead initialization was missed.
This broke complete operation of the driver whenever AP mode was
enabled.
This patch fixes https://bugs.archlinux.org/task/27996.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.stable.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Omar Ramirez Luna [Tue, 31 Jan 2012 01:20:18 +0000 (19:20 -0600)]
staging: tidspbridge: fix incorrect free to drv_datap
This structure is still used after it has been freed, since it
is being allocated in probe, calls to free it have been moved to
module's remove routine.
This should fix the follwoing messages when attempting to remove the
module:
drv_get_first_dev_extension: Failed to retrieve the object handle
drv_get_first_dev_extension: Failed to retrieve the object handle
drv_destroy: Failed to store DRV object
mgr_destroy: Failed to store MGR object
Signed-off-by: Omar Ramirez Luna <omar.ramirez@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Omar Ramirez Luna [Tue, 31 Jan 2012 01:20:17 +0000 (19:20 -0600)]
staging: tidspbridge: fix bridge_open memory leaks
There are two members of pr_ctxt allocated during bridge_open that
are never freed resulting in memory leaks, these are stream_id and
node_id, they are now freed on release of the handle (bridge_release)
right before freeing pr_ctxt.
Error path for bridge_open was also fixed since the same variables
could result in memory leaking due to missing handling of failure
scenarios. While at it, the indentation changes were introduced to
avoid interleaved goto statements inside big if blocks.
Signed-off-by: Omar Ramirez Luna <omar.ramirez@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Arve Hjønnevåg [Fri, 13 Jan 2012 18:21:25 +0000 (22:21 +0400)]
staging: android: lowmemorykiller: Don't wait more than one second for a process to die
If a process forked and the child process was killed by the
lowmemorykiller, the lowmemory killer would be disabled until
the parent process reaped the child or it died itself.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ameya Palande [Tue, 10 Jan 2012 17:00:58 +0000 (09:00 -0800)]
MAINTAINERS: staging: iio: add iio information
Signed-off-by: Ameya Palande <ameya.palande@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Seth Jennings [Fri, 30 Dec 2011 16:42:15 +0000 (10:42 -0600)]
staging: zcache: fix serialization bug in zv stats
In a multithreaded workload, the zv_curr_dist_counts
and zv_cumul_dist_counts statistics are being corrupted
because the increments and decrements in zv_create
and zv_free are not atomic.
This patch converts these statistics and their corresponding
increments/decrements/reads to atomic operations.
Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Acked-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Randy Dunlap [Thu, 2 Feb 2012 03:04:02 +0000 (19:04 -0800)]
staging: fix go7007-usb license
Add MODULE_LICENSE() for this source module to fix build warning:
WARNING: modpost: missing MODULE_LICENSE() in drivers/staging/media/go7007/go7007-usb.o
see include/linux/module.h for more information
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Cc: Ross Cohen <rcohen@snurgle.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Arve Hjønnevåg [Wed, 1 Feb 2012 23:29:13 +0000 (15:29 -0800)]
Staging: android: binder: Fix crashes when sharing a binder file between processes
Opening the binder driver and sharing the file returned with
other processes (e.g. by calling fork) can crash the kernel.
Prevent these crashes with the following changes:
- Add a mutex to protect against two processes mmapping the
same binder_proc.
- After locking mmap_sem, check that the vma we want to access
(still) points to the same mm_struct.
- Use proc->tsk instead of current to get the files struct since
this is where we get the rlimit from.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Shuah Khan [Fri, 27 Jan 2012 18:40:10 +0000 (11:40 -0700)]
Staging: android: Remove pmem driver
Addroid pmem driver is no longer used in any of the Android products.
This patch removes pmem driver from Android staging area
Reference: https://lkml.org/lkml/2012/1/23/183
Signed-off-by: Shuah Khan <shuahkhan@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Pekka Paalanen [Sun, 22 Jan 2012 14:33:47 +0000 (16:33 +0200)]
Staging: asus_oled: fix NULL-ptr crash on unloading
Asus_oled triggers the following bug on module unloading:
usbcore: deregistering interface driver asus-oled
BUG: unable to handle kernel NULL pointer dereference at
0000000000000038
IP: [<
ffffffff8111292b>] sysfs_delete_link+0x30/0x66
Call Trace:
[<
ffffffff81225373>] device_remove_class_symlinks+0x6b/0x70
[<
ffffffff812256a8>] device_del+0x9f/0x1ab
[<
ffffffff812257c5>] device_unregister+0x11/0x1e
[<
ffffffffa000cb82>] asus_oled_disconnect+0x4f/0x9e [asus_oled]
[<
ffffffff81277430>] usb_unbind_interface+0x54/0x103
[<
ffffffff812276c4>] __device_release_driver+0xa2/0xeb
[<
ffffffff81227794>] driver_detach+0x87/0xad
[<
ffffffff812269e9>] bus_remove_driver+0x91/0xc1
[<
ffffffff81227fb4>] driver_unregister+0x66/0x6e
[<
ffffffff812771ed>] usb_deregister+0xbb/0xc4
[<
ffffffffa000ce87>] asus_oled_exit+0x2f/0x31 [asus_oled]
[<
ffffffff81068365>] sys_delete_module+0x1b8/0x21b
[<
ffffffff810ae3de>] ? do_munmap+0x2ef/0x313
[<
ffffffff813699bb>] system_call_fastpath+0x16/0x1b
This is due to an incorrect destruction sequence in asus_oled_exit().
Fix the order, fixes the bug. Tested on an Asus G50V laptop only.
Cc: Jakub Schmidtke <sjakub@gmail.com>
Signed-off-by: Pekka Paalanen <pq@iki.fi>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Pekka Paalanen [Sun, 22 Jan 2012 14:33:46 +0000 (16:33 +0200)]
Staging: asus_oled: fix image processing
Programming an image was broken, because odev->buf_offs was not advanced
for val == 0 in append_values(). This regression was introduced in:
commit
1ff12a4aa354bed093a0240d5e6347b1e27601bc
Author: Kevin A. Granade <kevin.granade@gmail.com>
Date: Sat Sep 5 01:03:39 2009 -0500
Staging: asus_oled: Cleaned up checkpatch issues.
Fix the image processing by special-casing val == 0.
I have tested this change on an Asus G50V laptop only.
Cc: Jakub Schmidtke <sjakub@gmail.com>
Cc: Kevin A. Granade <kevin.granade@gmail.com>
Signed-off-by: Pekka Paalanen <pq@iki.fi>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Arve Hjønnevåg [Sat, 21 Jan 2012 03:56:21 +0000 (19:56 -0800)]
Staging: android: binder: Don't call dump_stack in binder_vma_open
If user-space partially unmaps the driver, binder_vma_open
would dump the kernel stack. This is not a kernel bug however
and will be treated as if the whole area was unmapped once
binder_vma_close gets called.
Signed-off-by: Arve Hjønnevåg <arve@android.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Larry Finger [Sat, 7 Jan 2012 16:07:03 +0000 (10:07 -0600)]
staging: r8712u: Add new Sitecom UsB ID
Add USB ID for SITECOM WLA-1000 V1 001 WLAN
Reported-and-tested-by: Roland Gruber <post@rolandgruber.de>
Reported-and-tested-by: Dario Lucia <dario.lucia@gmail.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Dan Magenheimer [Mon, 23 Jan 2012 21:52:20 +0000 (16:52 -0500)]
zcache: Set SWIZ_BITS to 8 to reduce tmem bucket lock contention.
SWIZ_BITS > 8 results in a much larger number of "tmem_obj"
allocations, likely one per page-placed-in-frontswap. The
tmem_obj is not huge (roughly 100 bytes), but it is large
enough to add a not-insignificant memory overhead to zcache.
The SWIZ_BITS=8 will get roughly the same lock contention
without the space wastage.
The effect of SWIZ_BITS can be thought of as "2^SWIZ_BITS is
the number of unique oids that be generated" (This concept is
limited to frontswap's use of tmem).
Acked-by: Seth Jennings <sjenning@linux.vnet.ibm.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Dan Magenheimer [Wed, 25 Jan 2012 22:32:51 +0000 (14:32 -0800)]
zcache: fix deadlock condition
I discovered this deadlock condition awhile ago working on RAMster
but it affects zcache as well. The list spinlock must be
locked prior to the page spinlock and released after. As
a result, the page copy must also be done while the locks are held.
Applies to 3.2. Konrad, please push (via GregKH?)...
this is definitely a bug fix so need not be pushed during
a -rc0 window.
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Rob Clark [Thu, 19 Jan 2012 00:33:02 +0000 (18:33 -0600)]
staging: drm/omap: fix locking issue
The create/free mmap offset code must be synchronized. Yet only some
callers of omap_gem_mmap_offset() held struct_mutex. Leading to various
crashes around drm_mm_insert_helper_range(). (In the free-object path,
which is currently the only place we drm_gem_free_mmap_offset(),
struct_mutex is already held.)
Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Julia Lawall [Mon, 9 Jan 2012 07:51:03 +0000 (08:51 +0100)]
drivers/staging/omapdrm/omap_fbdev.c: move free after uses
Move the free after the final uses.
The semantic patch that makes this report is available
in scripts/coccinelle/free/kfree.cocci.
More information about semantic patching is available at
http://coccinelle.lip6.fr/
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Rob Clark [Mon, 9 Jan 2012 01:37:37 +0000 (19:37 -0600)]
staging: drm/omap: fix minimum width/height
Fix minimum width/height so planes could be used to implement
hw mouse cursor.
Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Rob Clark [Mon, 16 Jan 2012 18:51:18 +0000 (12:51 -0600)]
staging: drm/omap: updates for DSS fifomerge API changes
Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Rob Clark [Mon, 16 Jan 2012 18:51:17 +0000 (12:51 -0600)]
staging: drm/omap: multiplanar and YUV support
Add support in framebuffer objects for other color formats and multi-
planar YUV (NV12). Since this requires changing the API between the
plane and fb for getting scanout information (paddr, etc), take
advantage of the opportunity and put in place a way to allow fb's to
be unpinned when they are not being scanned out. Now, before start
of scanout the plane calls omap_framebuffer_pin() which takes care
to pin all the backing bo's, then omap_framebuffer_update_scanout()
however many times to update the scanout address(es), etc, and then
when finished omap_framebuffer_unpin().
Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Rob Clark [Mon, 16 Jan 2012 18:51:16 +0000 (12:51 -0600)]
staging: drm/omap: add drm_plane support
Because framebuffer layer and overlay scanout video pipes are basically
thing in OMAP display subsystem (the only difference being that the first
video pipe does not support scaling or YUV formats), much of the CRTC
code is pulled into the plane implementation, and a private plane object
is used by the CRTC object. This avoids code duplication between the
plane and CRTC.
Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Rob Clark [Mon, 16 Jan 2012 18:51:15 +0000 (12:51 -0600)]
staging: drm/omap: drm API update: addfb2
Update to reflect changes in:
"drm: add an fb creation ioctl that takes a pixel format v5"
Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Rob Clark [Mon, 16 Jan 2012 18:51:14 +0000 (12:51 -0600)]
staging: drm/omap: drm API update: make fops struct const
Update to reflect changes in:
"Make the per-driver file_operations struct const"
Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Greg Kroah-Hartman [Mon, 30 Jan 2012 22:12:59 +0000 (14:12 -0800)]
staging: delete gma500 driver
It's now "properly" merged into the DRM tree in the kernel, so delete
the staging version of the driver as it is far obsolete and broken.
Requested-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Keith Packard [Wed, 8 Feb 2012 21:53:38 +0000 (13:53 -0800)]
drm/i915: fixup interlaced bits clearing in PIPECONF on PCH_SPLIT (v2)
An identical patch has been merged for i9xx_crtc_mode_set:
Commit
59df7b1771c150163e522f33c638096ab0efbf42
Author: Christian Schmidt <schmidt@digadd.de>
Date: Mon Dec 19 20:03:33 2011 +0100
drm/intel: Fix initialization if startup happens in interlaced mode [v2]
But that one neglected to fix up the ironlake+ path.
This should fix the issue reported by Alfonso Fiore where booting with
only a HDMI cable connected to his TV failed to display anything. The
issue is that the bios set up things for 1080i and used the pannel
fitter to scale up the lower progressive resolutions. We failed to
clear the interlace bit in the PIPEACONF register, resulting in havoc.
v2: Be more paranoid and just unconditionally clear the field before
setting new values.
Cc: Peter Ross <pross@xvid.org>
Cc: Alfonso Fiore <alfonso.fiore@gmail.com>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Keith Packard <keithp@keithp.com>
Dave Young [Wed, 8 Feb 2012 21:07:19 +0000 (22:07 +0100)]
loop: zero fill bio instead of return -EIO for partial read
commit
8268f5a741 ("deny partial write for loop dev fd") tried to fix the
loop device partial read information leak problem. But it changed the
semantics of read behavior. When we read beyond the end of the device we
should get 0 bytes, which is normal behavior, we should not just return
-EIO
Instead of returning -EIO, zero out the bio to avoid information leak in
case of partail read.
Signed-off-by: Dave Young <dyoung@redhat.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Tested-by: Jeff Moyer <jmoyer@redhat.com>
Cc: Dmitry Monakhov <dmonakhov@sw.ru>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Kent Overstreet [Wed, 8 Feb 2012 21:07:18 +0000 (22:07 +0100)]
bio: don't overflow in bio_get_nr_vecs()
There were two places bio_get_nr_vecs() could overflow:
First, it did a left shift to convert from sectors to bytes immediately
before dividing by PAGE_SIZE. If PAGE_SIZE ever was less than 512 a great
many things would break, so dividing by PAGE_SIZE >> 9 is safe and will
generate smaller code too.
The nastier overflow was in the DIV_ROUND_UP() (that's what the code was
effectively doing, anyways). If n + d overflowed, the whole thing would
return 0 which breaks things rather effectively.
bio_get_nr_vecs() doesn't claim to give an exact value anyways, so the
DIV_ROUND_UP() is silly; we could do a straight divide except if a
device's queue_max_sectors was less than PAGE_SIZE we'd return 0. So we
just add 1; this should always be safe - things will break badly if
bio_get_nr_vecs() returns > BIO_MAX_PAGES (bio_alloc() will suddenly start
failing) but it's queue_max_segments that must guard against this, if
queue_max_sectors is preventing this from happen things are going to
explode on architectures with different PAGE_SIZE.
Signed-off-by: Kent Overstreet <koverstreet@google.com>
Cc: Tejun Heo <tj@kernel.org>
Acked-by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Takashi Iwai [Wed, 8 Feb 2012 20:29:38 +0000 (21:29 +0100)]
Merge tag 'asoc-3.3' of git://git./linux/kernel/git/broonie/sound into for-linus
A few small WM8994 updates to go on top of the previous lot of things
that were sent. They collide with some -next work so I'd really like to
get them into 3.3-rc3 if possible to merge back up into the -next code.
All driver specific and unexciting in the grand scheme of things.
John W. Linville [Wed, 8 Feb 2012 19:53:43 +0000 (14:53 -0500)]
Merge branch 'master' of git://git./linux/kernel/git/linville/wireless into for-davem