Konrad Rzeszutek Wilk [Fri, 17 Aug 2012 13:27:35 +0000 (09:27 -0400)]
xen/p2m: Reuse existing P2M leafs if they are filled with 1:1 PFNs or INVALID.
If P2M leaf is completly packed with INVALID_P2M_ENTRY or with
1:1 PFNs (so IDENTITY_FRAME type PFNs), we can swap the P2M leaf
with either a p2m_missing or p2m_identity respectively. The old
page (which was created via extend_brk or was grafted on from the
mfn_list) can be re-used for setting new PFNs.
This also means we can remove git commit:
5bc6f9888db5739abfa0cae279b4b442e4db8049
xen/p2m: Reserve 8MB of _brk space for P2M leafs when populating back
which tried to fix this.
and make the amount that is required to be reserved much smaller.
CC: stable@vger.kernel.org # for 3.5 only.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Konrad Rzeszutek Wilk [Thu, 16 Aug 2012 15:31:27 +0000 (11:31 -0400)]
Revert "xen PVonHVM: move shared_info to MMIO before kexec"
This reverts commit
00e37bdb0113a98408de42db85be002f21dbffd3.
During shutdown of PVHVM guests with more than 2VCPUs on certain
machines we can hit the race where the replaced shared_info is not
replaced fast enough and the PV time clock retries reading the same
area over and over without any any success and is stuck in an
infinite loop.
Acked-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Konrad Rzeszutek Wilk [Mon, 30 Jul 2012 14:18:05 +0000 (10:18 -0400)]
xen/p2m: Reserve 8MB of _brk space for P2M leafs when populating back.
When we release pages back during bootup:
Freeing 9d-100 pfn range: 99 pages freed
Freeing 9cf36-9d0d2 pfn range: 412 pages freed
Freeing 9f6bd-9f6bf pfn range: 2 pages freed
Freeing 9f714-9f7bf pfn range: 171 pages freed
Freeing 9f7e0-9f7ff pfn range: 31 pages freed
Freeing 9f800-100000 pfn range: 395264 pages freed
Released 395979 pages of unused memory
We then try to populate those pages back. In the P2M tree however
the space for those leafs must be reserved - as such we use extend_brk.
We reserve 8MB of _brk space, which means we can fit over
1048576 PFNs - which is more than we should ever need.
Without this, on certain compilation of the kernel we would hit:
(XEN) domain_crash_sync called from entry.S
(XEN) CPU: 0
(XEN) RIP: e033:[<
ffffffff818aad3b>]
(XEN) RFLAGS:
0000000000000206 EM: 1 CONTEXT: pv guest
(XEN) rax:
ffffffff81a7c000 rbx:
000000000000003d rcx:
0000000000001000
(XEN) rdx:
ffffffff81a7b000 rsi:
0000000000001000 rdi:
0000000000001000
(XEN) rbp:
ffffffff81801cd8 rsp:
ffffffff81801c98 r8:
0000000000100000
(XEN) r9:
ffffffff81a7a000 r10:
0000000000000001 r11:
0000000000000003
(XEN) r12:
0000000000000004 r13:
0000000000000004 r14:
000000000000003d
(XEN) r15:
00000000000001e8 cr0:
000000008005003b cr4:
00000000000006f0
(XEN) cr3:
0000000125803000 cr2:
0000000000000000
(XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e02b cs: e033
(XEN) Guest stack trace from rsp=
ffffffff81801c98:
.. which is extend_brk hitting a BUG_ON.
Interestingly enough, most of the time we are not going to hit this
b/c the _brk space is quite large (v3.5):
ffffffff81a25000 B __brk_base
ffffffff81e43000 B __brk_limit
= ~4MB.
vs earlier kernels (with this back-ported), the space is smaller:
ffffffff81a25000 B __brk_base
ffffffff81a7b000 B __brk_limit
= 344 kBytes.
where we would certainly hit this and hit extend_brk.
Note that git commit
c3d93f880197953f86ab90d9da4744e926b38e33
(xen: populate correct number of pages when across mem boundary (v2))
exposed this bug).
[v1: Made it 8MB of _brk space instead of 4MB per Jan's suggestion]
CC: stable@vger.kernel.org #only for 3.5
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
zhenzhong.duan [Wed, 18 Jul 2012 05:06:39 +0000 (13:06 +0800)]
xen: populate correct number of pages when across mem boundary (v2)
When populate pages across a mem boundary at bootup, the page count
populated isn't correct. This is due to mem populated to non-mem
region and ignored.
Pfn range is also wrongly aligned when mem boundary isn't page aligned.
For a dom0 booted with dom_mem=3368952K(0xcd9ff000-4k) dmesg diff is:
[ 0.000000] Freeing 9e-100 pfn range: 98 pages freed
[ 0.000000] 1-1 mapping on 9e->100
[ 0.000000] 1-1 mapping on cd9ff->100000
[ 0.000000] Released 98 pages of unused memory
[ 0.000000] Set 206435 page(s) to 1-1 mapping
-[ 0.000000] Populating cd9fe-cda00 pfn range: 1 pages added
+[ 0.000000] Populating cd9fe-cd9ff pfn range: 1 pages added
+[ 0.000000] Populating 100000-100061 pfn range: 97 pages added
[ 0.000000] BIOS-provided physical RAM map:
[ 0.000000] Xen:
0000000000000000 -
000000000009e000 (usable)
[ 0.000000] Xen:
00000000000a0000 -
0000000000100000 (reserved)
[ 0.000000] Xen:
0000000000100000 -
00000000cd9ff000 (usable)
[ 0.000000] Xen:
00000000cd9ffc00 -
00000000cda53c00 (ACPI NVS)
...
[ 0.000000] Xen:
0000000100000000 -
0000000100061000 (usable)
[ 0.000000] Xen:
0000000100061000 -
000000012c000000 (unusable)
...
[ 0.000000] MEMBLOCK configuration:
...
-[ 0.000000] reserved[0x4] [0x000000cd9ff000-0x000000cd9ffbff], 0xc00 bytes
-[ 0.000000] reserved[0x5] [0x00000100000000-0x00000100060fff], 0x61000 bytes
Related xen memory layout:
(XEN) Xen-e820 RAM map:
(XEN)
0000000000000000 -
000000000009ec00 (usable)
(XEN)
00000000000f0000 -
0000000000100000 (reserved)
(XEN)
0000000000100000 -
00000000cd9ffc00 (usable)
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
[v2: If xen_do_chunk fail(populate), abort this chunk and any others]
Suggested by David, thanks.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Olaf Hering [Tue, 17 Jul 2012 15:43:35 +0000 (17:43 +0200)]
xen PVonHVM: move shared_info to MMIO before kexec
Currently kexec in a PVonHVM guest fails with a triple fault because the
new kernel overwrites the shared info page. The exact failure depends on
the size of the kernel image. This patch moves the pfn from RAM into
MMIO space before the kexec boot.
The pfn containing the shared_info is located somewhere in RAM. This
will cause trouble if the current kernel is doing a kexec boot into a
new kernel. The new kernel (and its startup code) can not know where the
pfn is, so it can not reserve the page. The hypervisor will continue to
update the pfn, and as a result memory corruption occours in the new
kernel.
One way to work around this issue is to allocate a page in the
xen-platform pci device's BAR memory range. But pci init is done very
late and the shared_info page is already in use very early to read the
pvclock. So moving the pfn from RAM to MMIO is racy because some code
paths on other vcpus could access the pfn during the small window when
the old pfn is moved to the new pfn. There is even a small window were
the old pfn is not backed by a mfn, and during that time all reads
return -1.
Because it is not known upfront where the MMIO region is located it can
not be used right from the start in xen_hvm_init_shared_info.
To minimise trouble the move of the pfn is done shortly before kexec.
This does not eliminate the race because all vcpus are still online when
the syscore_ops will be called. But hopefully there is no work pending
at this point in time. Also the syscore_op is run last which reduces the
risk further.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Olaf Hering [Tue, 17 Jul 2012 09:59:15 +0000 (11:59 +0200)]
xen: simplify init_hvm_pv_info
init_hvm_pv_info is called only in PVonHVM context, move it into ifdef.
init_hvm_pv_info does not fail, make it a void function.
remove arguments from init_hvm_pv_info because they are not used by the
caller.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Olaf Hering [Tue, 17 Jul 2012 09:57:41 +0000 (11:57 +0200)]
xen: remove cast from HYPERVISOR_shared_info assignment
Both have type struct shared_info so no cast is needed.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Olaf Hering [Tue, 10 Jul 2012 13:31:39 +0000 (15:31 +0200)]
xen: enable platform-pci only in a Xen guest
While debugging kexec issues in a PVonHVM guest I modified
xen_hvm_platform() to return false to disable all PV drivers. This
caused a crash in platform_pci_init() because it expects certain data
structures to be initialized properly.
To avoid such a crash make sure the driver is initialized only if
running in a Xen guest.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Olaf Hering [Tue, 10 Jul 2012 12:50:03 +0000 (14:50 +0200)]
xen/pv-on-hvm kexec: shutdown watches from old kernel
Add xs_reset_watches function to shutdown watches from old kernel after
kexec boot. The old kernel does not unregister all watches in the
shutdown path. They are still active, the double registration can not
be detected by the new kernel. When the watches fire, unexpected events
will arrive and the xenwatch thread will crash (jumps to NULL). An
orderly reboot of a hvm guest will destroy the entire guest with all its
resources (including the watches) before it is rebuilt from scratch, so
the missing unregister is not an issue in that case.
With this change the xenstored is instructed to wipe all active watches
for the guest. However, a patch for xenstored is required so that it
accepts the XS_RESET_WATCHES request from a client (see changeset
23839:
42a45baf037d in xen-unstable.hg). Without the patch for xenstored
the registration of watches will fail and some features of a PVonHVM
guest are not available. The guest is still able to boot, but repeated
kexec boots will fail.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
David Vrabel [Mon, 9 Jul 2012 10:39:08 +0000 (11:39 +0100)]
xen/x86: avoid updating TLS descriptors if they haven't changed
When switching tasks in a Xen PV guest, avoid updating the TLS
descriptors if they haven't changed. This improves the speed of
context switches by almost 10% as much of the time the descriptors are
the same or only one is different.
The descriptors written into the GDT by Xen are modified from the
values passed in the update_descriptor hypercall so we keep shadow
copies of the three TLS descriptors to compare against.
lmbench3 test Before After Improvement
--------------------------------------------
lat_ctx -s 32 24 7.19 6.52 9%
lat_pipe 12.56 11.66 7%
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
David Vrabel [Mon, 9 Jul 2012 10:39:07 +0000 (11:39 +0100)]
xen/x86: add desc_equal() to compare GDT descriptors
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
[v1: Moving it to the Xen file]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
David Vrabel [Mon, 9 Jul 2012 10:39:06 +0000 (11:39 +0100)]
xen/mm: zero PTEs for non-present MFNs in the initial page table
When constructing the initial page tables, if the MFN for a usable PFN
is missing in the p2m then that frame is initially ballooned out. In
this case, zero the PTE (as in decrease_reservation() in
drivers/xen/balloon.c).
This is obviously safe instead of having an valid PTE with an MFN of
INVALID_P2M_ENTRY (~0).
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
David Vrabel [Mon, 9 Jul 2012 10:39:05 +0000 (11:39 +0100)]
xen/mm: do direct hypercall in xen_set_pte() if batching is unavailable
In xen_set_pte() if batching is unavailable (because the caller is in
an interrupt context such as handling a page fault) it would fall back
to using native_set_pte() and trapping and emulating the PTE write.
On 32-bit guests this requires two traps for each PTE write (one for
each dword of the PTE). Instead, do one mmu_update hypercall
directly.
During construction of the initial page tables, continue to use
native_set_pte() because most of the PTEs being set are in writable
and unpinned pages (see phys_pmd_init() in arch/x86/mm/init_64.c) and
using a hypercall for this is very expensive.
This significantly improves page fault performance in 32-bit PV
guests.
lmbench3 test Before After Improvement
----------------------------------------------
lat_pagefault 3.18 us 2.32 us 27%
lat_proc fork 356 us 313.3 us 11%
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Konrad Rzeszutek Wilk [Tue, 26 Jun 2012 13:30:51 +0000 (09:30 -0400)]
xen/hvc: Fix up checks when the info is allocated.
Coverity would complain about this - even thought it looks OK.
CID 401957
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Konrad Rzeszutek Wilk [Tue, 19 Jun 2012 18:39:31 +0000 (14:39 -0400)]
xen/acpi: Fix potential memory leak.
Coverity points out that we do not free in one case the
pr_backup - and sure enough we forgot.
Found by Coverity (CID 401970)
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Liu, Jinsong [Fri, 15 Jun 2012 01:03:39 +0000 (09:03 +0800)]
xen/mce: add .poll method for mcelog device driver
If a driver leaves its poll method NULL, the device is assumed to
be both readable and writable without blocking.
This patch add .poll method to xen mcelog device driver, so that
when mcelog use system calls like ppoll or select, it would be
blocked when no data available, and avoid spinning at CPU.
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Liu, Jinsong [Tue, 12 Jun 2012 15:11:16 +0000 (23:11 +0800)]
xen/mce: schedule a workqueue to avoid sleep in atomic context
copy_to_user might sleep and print a stack trace if it is executed
in an atomic spinlock context. Like this:
(XEN) CMCI: send CMCI to DOM0 through virq
BUG: sleeping function called from invalid context at /home/konradinux/kernel.h:199
in_atomic(): 1, irqs_disabled(): 0, pid: 4581, name: mcelog
Pid: 4581, comm: mcelog Tainted: G O
3.5.0-rc1upstream-00003-g149000b-dirty #1
[<
ffffffff8109ad9a>] __might_sleep+0xda/0x100
[<
ffffffff81329b0b>] xen_mce_chrdev_read+0xab/0x140
[<
ffffffff81148945>] vfs_read+0xc5/0x190
[<
ffffffff81148b0c>] sys_read+0x4c/0x90
[<
ffffffff815bd039>] system_call_fastpath+0x16
This patch schedule a workqueue for IRQ handler to poll the data,
and use mutex instead of spinlock, so copy_to_user sleep in atomic
context would not occur.
Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Suggested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Liu, Jinsong [Mon, 11 Jun 2012 12:38:08 +0000 (20:38 +0800)]
xen/pcpu: Xen physical cpus online/offline sys interface
This patch provide Xen physical cpus online/offline sys interface.
User can use it for their own purpose, like power saving:
by offlining some cpus when light workload it save power greatly.
Its basic workflow is, user online/offline cpu via sys interface,
then hypercall xen to implement, after done xen inject virq back to dom0,
and then dom0 sync cpu status.
Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Liu, Jinsong [Thu, 7 Jun 2012 12:10:37 +0000 (20:10 +0800)]
xen/mce: Register native mce handler as vMCE bounce back point
When Xen hypervisor inject vMCE to guest, use native mce handler
to handle it
Signed-off-by: Ke, Liping <liping.ke@intel.com>
Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Liu, Jinsong [Thu, 7 Jun 2012 11:58:50 +0000 (19:58 +0800)]
x86, MCE, AMD: Adjust initcall sequence for xen
there are 3 funcs which need to be _initcalled in a logic sequence:
1. xen_late_init_mcelog
2. mcheck_init_device
3. threshold_init_device
xen_late_init_mcelog must register xen_mce_chrdev_device before
native mce_chrdev_device registration if running under xen platform;
mcheck_init_device should be inited before threshold_init_device to
initialize mce_device, otherwise a a NULL ptr dereference will cause panic.
so we use following _initcalls
1. device_initcall(xen_late_init_mcelog);
2. device_initcall_sync(mcheck_init_device);
3. late_initcall(threshold_init_device);
when running under xen, the initcall order is 1,2,3;
on baremetal, we skip 1 and we do only 2 and 3.
Acked-and-tested-by: Borislav Petkov <bp@amd64.org>
Suggested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Liu, Jinsong [Thu, 7 Jun 2012 11:56:51 +0000 (19:56 +0800)]
xen/mce: Add mcelog support for Xen platform
When MCA error occurs, it would be handled by Xen hypervisor first,
and then the error information would be sent to initial domain for logging.
This patch gets error information from Xen hypervisor and convert
Xen format error into Linux format mcelog. This logic is basically
self-contained, not touching other kernel components.
By using tools like mcelog tool users could read specific error information,
like what they did under native Linux.
To test follow directions outlined in Documentation/acpi/apei/einj.txt
Acked-and-tested-by: Borislav Petkov <borislav.petkov@amd.com>
Signed-off-by: Ke, Liping <liping.ke@intel.com>
Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Linus Torvalds [Sun, 17 Jun 2012 00:25:17 +0000 (17:25 -0700)]
Linux 3.5-rc3
Linus Torvalds [Sun, 17 Jun 2012 00:01:41 +0000 (17:01 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs
Pull btrfs compile warning fixes from Chris Mason.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: cast devid to unsigned long long for printk %llu
Btrfs: init old_generation in get_old_root
Linus Torvalds [Sun, 17 Jun 2012 00:00:15 +0000 (17:00 -0700)]
Merge branch 'stable' of git://git./linux/kernel/git/cmetcalf/linux-tile
Pull arch/tile update from Chris Metcalf:
"This one-line bug fix unbreaks glibc robust mutexes (among other
things no doubt), from code merged in during the 3.5 merge window but
which we had been running internally at Tilera for almost a year."
* 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
tile: fix bug in get_user() for 4-byte values
Linus Torvalds [Sat, 16 Jun 2012 23:59:05 +0000 (16:59 -0700)]
Merge tag 'fbdev-fixes-for-3.5-1' of git://github.com/schandinat/linux-2.6
Pull fbdev fixes from Florian Tobias Schandinat:
- two fixes for s3c-fb by Jingoo Han (including a fix for a potential
division by zero)
- a couple of randconfig fixes by Arnd Bergmann
- a cleanup for bfin_adv7393fb by Emil Goode
* tag 'fbdev-fixes-for-3.5-1' of git://github.com/schandinat/linux-2.6:
video: s3c-fb: fix possible division by zero in s3c_fb_calc_pixclk
video: s3c-fb: clear SHADOWCON register when clearing hardware window registers
drivers/tosa: driver needs I2C and SPI to compile
drivers/savagefb: use mdelay instead of udelay
video/console: automatically select a font
video/ili9320: do not mark exported functions __devexit
drivers/video: use correct __devexit_p annotation
video: bfin_adv7393fb: Convert to kstrtouint_from_user
Chris Metcalf [Sat, 16 Jun 2012 20:53:06 +0000 (16:53 -0400)]
tile: fix bug in get_user() for 4-byte values
The definition of 32-bit values in the 64-bit tilegx architecture is that
they should be sign-extended regardless of whether they are considered
signed or unsigned by the compiler. Accordingly, we need to use an
"ld4s" rather than "ld4u" to load and sign-extend for get_user().
This fixes glibc bug 14238 (see http://sourceware.org/bugzilla),
introduced during the 3.5 merge window.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Hugh Dickins [Sat, 16 Jun 2012 00:55:50 +0000 (17:55 -0700)]
swap: fix shmem swapping when more than 8 areas
Minchan Kim reports that when a system has many swap areas, and tmpfs
swaps out to the ninth or more, shmem_getpage_gfp()'s attempts to read
back the page cannot locate it, and the read fails with -ENOMEM.
Whoops. Yes, I blindly followed read_swap_header()'s pte_to_swp_entry(
swp_entry_to_pte()) technique for determining maximum usable swap
offset, without stopping to realize that that actually depends upon the
pte swap encoding shifting swap offset to the higher bits and truncating
it there. Whereas our radix_tree swap encoding leaves offset in the
lower bits: it's swap "type" (that is, index of swap area) that was
truncated.
Fix it by reducing the SWP_TYPE_SHIFT() in swapops.h, and removing the
broken radix_to_swp_entry(swp_to_radix_entry()) from read_swap_header().
This does not reduce the usable size of a swap area any further, it
leaves it as claimed when making the original commit: no change from 3.0
on x86_64, nor on i386 without PAE; but 3.0's 512GB is reduced to 128GB
per swapfile on i386 with PAE. It's not a change I would have risked
five years ago, but with x86_64 supported for ten years, I believe it's
appropriate now.
Hmm, and what if some architecture implements its swap pte with offset
encoded below type? That would equally break the maximum usable swap
offset check. Happily, they all follow the same tradition of encoding
offset above type, but I'll prepare a check on that for next.
Reported-and-Reviewed-and-Tested-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: stable@vger.kernel.org [3.1, 3.2, 3.3, 3.4]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sat, 16 Jun 2012 00:39:32 +0000 (17:39 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"This is a couple of minor fixes, one for a preempt warning in the
mpt2sas driver and one is a config failure with the new sd async
domain."
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
[SCSI] Fix sd_probe_domain config problem
[SCSI] mpt2sas: Fix unsafe using smp_processor_id() in preemptible
Linus Torvalds [Sat, 16 Jun 2012 00:37:23 +0000 (17:37 -0700)]
Merge tag 'nfs-for-3.5-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes from Trond Myklebust:
"Highlights include:
- Fix a couple of mount regressions due to the recent cleanups.
- Fix an Oops in the open recovery code
- Fix an rpc_pipefs upcall hang that results from some of the net
namespace work from 3.4.x (stable kernel candidate).
- Fix a couple of write and o_direct regressions that were found at
last weeks Bakeathon testing event in Ann Arbor."
* tag 'nfs-for-3.5-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFS: add an endian notation for sparse
NFSv4.1: integer overflow in decode_cb_sequence_args()
rpc_pipefs: allow rpc_purge_list to take a NULL waitq pointer
NFSv4 do not send an empty SETATTR compound
NFSv2: EOF incorrectly set on short read
NFS: Use the NFS_DEFAULT_VERSION for v2 and v3 mounts
NFS: fix directio refcount bug on commit
NFSv4: Fix unnecessary delegation returns in nfs4_do_open
NFSv4.1: Convert another trivial printk into a dprintk
NFS4: Fix open bug when pnfs module blacklisted
NFS: Remove incorrect BUG_ON in nfs_found_client
NFS: Map minor mismatch error to protocol not support error.
NFS: Fix a commit bug
NFS4: Set parsed mount data version to 4
NFSv4.1: Ensure we clear session state flags after a session creation
NFSv4.1: Convert a trivial printk into a dprintk
NFSv4: Fix up decode_attr_mdsthreshold
NFSv4: Fix an Oops in the open recovery code
NFSv4.1: Fix a request leak on the back channel
Linus Torvalds [Sat, 16 Jun 2012 00:35:01 +0000 (17:35 -0700)]
Merge branch 'fixes-for-linus' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping
Pull DMA-mapping fixes from Marek Szyprowski:
"A set of minor fixes for dma-mapping code (ARM and x86) required for
Contiguous Memory Allocator (CMA) patches merged in v3.5-rc1."
* 'fixes-for-linus' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping:
x86: dma-mapping: fix broken allocation when dma_mask has been provided
ARM: dma-mapping: fix debug messages in dmabounce code
ARM: mm: fix type of the arm_dma_limit global variable
ARM: dma-mapping: Add missing static storage class specifier
Linus Torvalds [Sat, 16 Jun 2012 00:28:20 +0000 (17:28 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/paulus/powerpc
Pull PowerPC fix from Paul Mackerras:
"Just one commit, and a one-liner at that, but an important one;
without it hard_irq_disable() does nothing on powerpc."
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
Make hard_irq_disable() actually hard-disable interrupts
Linus Torvalds [Sat, 16 Jun 2012 00:27:31 +0000 (17:27 -0700)]
Merge branch 'for-3.5' of git://linux-nfs.org/~bfields/linux
Pull two nfsd bugfixes from J. Bruce Fields.
* 'for-3.5' of git://linux-nfs.org/~bfields/linux:
nfsd4: BUG_ON(!is_spin_locked()) no good on UP kernels
NFS: hard-code init_net for NFS callback transports
Linus Torvalds [Sat, 16 Jun 2012 00:17:15 +0000 (17:17 -0700)]
Merge tag 'stable/for-linus-3.5-rc2-tag' of git://git./linux/kernel/git/konrad/xen
Pull five Xen bug-fixes from Konrad Rzeszutek Wilk:
- When booting as PVHVM we would try to use PV console - but would not validate
the parameters causing us to crash during restore b/c we re-use the wrong event
channel.
- When booting on machines with SR-IOV PCI bridge we didn't check for the bridge
and tried to use it.
- Under AMD machines would advertise the APERFMPERF resulting in needless amount
of MSRs from the guest.
- A global value (xen_released_pages) was not subtracted at bootup when pages
were added back in. This resulted in the balloon worker having the wrong
account of how many pages were truly released.
- Fix dead-lock when xen-blkfront is run in the same domain as xen-blkback.
* tag 'stable/for-linus-3.5-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
xen: mark local pages as FOREIGN in the m2p_override
xen/setup: filter APERFMPERF cpuid feature out
xen/balloon: Subtract from xen_released_pages the count that is populated.
xen/pci: Check for PCI bridge before using it.
xen/events: Add WARN_ON when quick lookup found invalid type.
xen/hvc: Check HVM_PARAM_CONSOLE_[EVTCHN|PFN] for correctness.
xen/hvc: Fix error cases around HVM_PARAM_CONSOLE_PFN
xen/hvc: Collapse error logic.
Linus Torvalds [Sat, 16 Jun 2012 00:10:02 +0000 (17:10 -0700)]
Merge tag 'usb-3.5-rc3' of git://git./linux/kernel/git/gregkh/usb
Pull USB fixes from Greg Kroah-Hartman:
"Here are a bunch of tiny fixes for the USB core and drivers for
3.5-rc3
A bunch of gadget fixes, and new device ids, as well as some fixes for
a number of different regressions that have been reported recently.
We also fixed some PCI host controllers to resolve a long-standing bug
with a whole class of host controllers that have been plaguing people
for a number of kernel releases, preventing their systems from
suspending properly.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>"
* tag 'usb-3.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (41 commits)
USB: fix gathering of interface associations
usb: ehci-sh: fix illegal phy_init() running when platform_data is NULL
usb: cdc-acm: fix devices not unthrottled on open
Fix OMAP EHCI suspend/resume failure (i693)
USB: ohci-hub: Mark ohci_finish_controller_resume() as __maybe_unused
usb: use usb_serial_put in usb_serial_probe errors
USB: EHCI: Fix build warning in xilinx ehci driver
USB: fix PS3 EHCI systems
xHCI: Increase the timeout for controller save/restore state operation
xhci: Don't free endpoints in xhci_mem_cleanup()
xhci: Fix invalid loop check in xhci_free_tt_info()
xhci: Fix error path return value.
USB: Checking the wrong variable in usb_disable_lpm()
usb-storage: Add 090c:1000 to unusal-devs
USB: serial-generic: use a single set of device IDs
USB: serial: Enforce USB driver and USB serial driver match
USB: add NO_D3_DURING_SLEEP flag and revert
151b61284776be2
USB: option: add more YUGA device ids
USB: mos7840: Fix compilation of usb serial driver
USB: option: fix memory leak
...
Linus Torvalds [Sat, 16 Jun 2012 00:07:48 +0000 (17:07 -0700)]
Merge git://git./linux/kernel/git/davem/ide
Pull IDE fixes from David S. Miller:
1) Two fixes to icside, one for a build failure and another for a
warning. From Christian Dietrich.
2) Fix a bit operation that did erroneous masking, from Julia Lawall.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide:
drivers/ide/ide-cs.c: adjust suspicious bit operation
ide: icside.c: fix printk format string compile warning
ide: icside.c: Fix compile with CONFIG_BLK_DEV_IDEDMA_ICS=n
Chris Mason [Sat, 16 Jun 2012 00:07:17 +0000 (20:07 -0400)]
Btrfs: cast devid to unsigned long long for printk %llu
Avoid warning in 32 bit machines
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Linus Torvalds [Sat, 16 Jun 2012 00:07:06 +0000 (17:07 -0700)]
Merge git://git./linux/kernel/git/davem/sparc
Pull sparc update from David S. Miller:
"This just removes some sparc headers that were never, ever, used."
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
sparc: remove two unused headers
Chris Mason [Sat, 16 Jun 2012 00:02:02 +0000 (20:02 -0400)]
Btrfs: init old_generation in get_old_root
gcc was giving an uninit variable warning here. Strictly
speaking we don't need to init it, but this will make things
much less error prone.
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Linus Torvalds [Fri, 15 Jun 2012 23:59:19 +0000 (16:59 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar.
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/smp: Fix topology checks on AMD MCM CPUs
x86/mm: Fix some kernel-doc warnings
x86, um: Correct syscall table type attributes breaking gcc 4.8
Linus Torvalds [Fri, 15 Jun 2012 23:58:10 +0000 (16:58 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar.
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
watchdog: Quiet down the boot messages
perf/x86: Fix broken LBR fixup code
tracing: Have tracing_off() actually turn tracing off
Linus Torvalds [Fri, 15 Jun 2012 23:52:35 +0000 (16:52 -0700)]
Merge branch 'core-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull core updates (RCU and locking) from Ingo Molnar:
"Most of the diffstat comes from the RCU slow boot regression fixes,
but there's also a debuggability improvements/fixes."
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
memblock: Document memblock_is_region_{memory,reserved}()
rcu: Precompute RCU_FAST_NO_HZ timer offsets
rcu: Move RCU_FAST_NO_HZ per-CPU variables to rcu_dynticks structure
rcu: Update RCU_FAST_NO_HZ tracing for lazy callbacks
rcu: RCU_FAST_NO_HZ detection of callback adoption
spinlock: Indicate that a lockup is only suspected
kdump: Execute kmsg_dump(KMSG_DUMP_PANIC) after smp_send_stop()
panic: Make panic_on_oops configurable
Linus Torvalds [Fri, 15 Jun 2012 23:07:24 +0000 (16:07 -0700)]
Merge git://git./linux/kernel/git/nab/target-pending
Pull target updates from Nicholas Bellinger:
"This series contains post merge qla_target.c / tcm_qla2xxx bugfixes
from the past weeks, including the patch to allow target-core to use
an optional session shutdown callback to help address an active I/O
shutdown bug in tcm_qla2xxx code (Joern).
Also included is a target regression bugfix releated to explict ALUA
target port group CDB emulation that is CC'ed to stable (Roland)."
* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
qla2xxx: Remove version.h header file inclusion
tcm_qla2xxx: Handle malformed wwn strings properly
tcm_qla2xxx: tcm_qla2xxx_handle_tmr() can be static
qla2xxx: Don't leak commands we give up on in qlt_do_work()
qla2xxx: Don't crash if we can't find cmd for failed CTIO
tcm_qla2xxx: Don't insert nacls without sessions into the btree
target: Return error to initiator if SET TARGET PORT GROUPS emulation fails
tcm_qla2xxx: Clear session s_id + loop_id earlier during shutdown
tcm_qla2xxx: Convert to TFO->put_session() usage
target: Add TFO->put_session() caller for HW fabric session shutdown
Linus Torvalds [Fri, 15 Jun 2012 23:04:37 +0000 (16:04 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/mason/linux-btrfs
Pull btrfs update from Chris Mason:
"The dates look like I had to rebase this morning because there was a
compiler warning for a printk arg that I had missed earlier.
These are all fixes, including one to prevent using stale pointers for
device names, and lots of fixes around transaction abort cleanups
(Josef, Liu Bo).
Jan Schmidt also sent in a number of fixes for the new reference
number tracking code.
Liu Bo beat me to updating the MAINTAINERS file. Since he thought to
also fix the git url, I kept his commit."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: (24 commits)
Btrfs: update MAINTAINERS info for BTRFS FILE SYSTEM
Btrfs: destroy the items of the delayed inodes in error handling routine
Btrfs: make sure that we've made everything in pinned tree clean
Btrfs: avoid memory leak of extent state in error handling routine
Btrfs: do not resize a seeding device
Btrfs: fix missing inherited flag in rename
Btrfs: fix incompat flags setting
Btrfs: fix defrag regression
Btrfs: call filemap_fdatawrite twice for compression
Btrfs: keep inode pinned when compressing writes
Btrfs: implement ->show_devname
Btrfs: use rcu to protect device->name
Btrfs: unlock everything properly in the error case for nocow
Btrfs: fix btrfs_destroy_marked_extents
Btrfs: abort the transaction if the commit fails
Btrfs: wake up transaction waiters when aborting a transaction
Btrfs: fix locking in btrfs_destroy_delayed_refs
Btrfs: pass locked_page into extent_clear_unlock_delalloc if theres an error
Btrfs: fix race in tree mod log addition
Btrfs: add btrfs_next_old_leaf
...
Liu Bo [Thu, 14 Jun 2012 08:23:25 +0000 (02:23 -0600)]
Btrfs: update MAINTAINERS info for BTRFS FILE SYSTEM
Update to the latest btrfs's maintainer mail and git repo.
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Miao Xie [Thu, 14 Jun 2012 08:23:22 +0000 (02:23 -0600)]
Btrfs: destroy the items of the delayed inodes in error handling routine
the items of the delayed inodes were forgotten to be freed, this patch
fixes it.
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Liu Bo [Thu, 14 Jun 2012 08:23:21 +0000 (02:23 -0600)]
Btrfs: make sure that we've made everything in pinned tree clean
Since we have two trees for recording pinned extents, we need to go through
both of them to make sure that we've done everything clean.
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Liu Bo [Thu, 14 Jun 2012 08:23:20 +0000 (02:23 -0600)]
Btrfs: avoid memory leak of extent state in error handling routine
We've forgotten to clear extent states in pinned tree, which will results in
space counter mismatch and memory leak:
WARNING: at fs/btrfs/extent-tree.c:7537 btrfs_free_block_groups+0x1f3/0x2e0 [btrfs]()
...
space_info 2 has
8380416 free, is not full
space_info total=
12582912, used=4096, pinned=4096, reserved=0, may_use=0, readonly=
4194304
btrfs state leak: start
29364224 end
29376511 state 1 in tree
ffff880075f20090 refs 1
...
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Liu Bo [Thu, 14 Jun 2012 08:23:19 +0000 (02:23 -0600)]
Btrfs: do not resize a seeding device
Seeding devices are not supposed to change any more.
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Liu Bo [Thu, 14 Jun 2012 08:23:18 +0000 (02:23 -0600)]
Btrfs: fix missing inherited flag in rename
When we move a file into a directory with compression flag, we need to
inherite BTRFS_INODE_COMPRESS and clear BTRFS_INODE_NOCOMPRESS as well.
But if we move a file into a directory without compression flag, we need
to clear both of them.
It is the way how our setflags deals with compression flag, so keep
the same behaviour here.
Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Chris Mason [Fri, 15 Jun 2012 01:33:34 +0000 (21:33 -0400)]
Merge branch 'for-chris' of git://git.jan-o-sch.net/btrfs-unstable into for-linus
Paul Mackerras [Fri, 15 Jun 2012 04:51:39 +0000 (14:51 +1000)]
Make hard_irq_disable() actually hard-disable interrupts
At present, hard_irq_disable() does nothing on powerpc because of
this code in include/linux/interrupt.h:
#ifndef hard_irq_disable
#define hard_irq_disable() do { } while(0)
#endif
So we need to make our hard_irq_disable be a macro. It was previously
a macro until commit
7230c56441 ("powerpc: Rework lazy-interrupt
handling") changed it to a static inline function.
Cc: stable@vger.kernel.org
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
--
arch/powerpc/include/asm/hw_irq.h | 3 +++
1 file changed, 3 insertions(+)
Li Zefan [Mon, 11 Jun 2012 09:10:51 +0000 (17:10 +0800)]
Btrfs: fix incompat flags setting
It's a bug, but it happens to work, as BTRFS_COMPRESS_LZO == 2, which
has only one bit set.
Signed-off-by: Li Zefan <lizefan@huawei.com>
Li Zefan [Mon, 11 Jun 2012 08:03:35 +0000 (16:03 +0800)]
Btrfs: fix defrag regression
If a file has 3 small extents:
| ext1 | ext2 | ext3 |
Running "btrfs fi defrag" will only defrag the last two extents, if those
extent mappings hasn't been read into memory from disk.
This bug was introduced by commit
17ce6ef8d731af5edac8c39e806db4c7e1f6956f
("Btrfs: add a check to decide if we should defrag the range")
The cause is, that commit looked into previous and next extents using
lookup_extent_mapping() only.
While at it, remove the code that checks the previous extent, since
it's sufficient to check the next extent.
Signed-off-by: Li Zefan <lizefan@huawei.com>
Josef Bacik [Fri, 8 Jun 2012 19:26:47 +0000 (15:26 -0400)]
Btrfs: call filemap_fdatawrite twice for compression
I removed this in an earlier commit and I was wrong. Because compression
can return from filemap_fdatawrite() without having actually set any of it's
pages as writeback() it can make filemap_fdatawait() do essentially nothing,
and then we won't find any ordered extents because they may not have been
created yet. So not only does this make fsync() completely useless, but it
will also screw up if you truncate on a non-page aligned offset since we
zero out the end and then wait on ordered extents and then call drop caches.
We can drop the cache before the io completes and then we try to unpin the
extent we just wrote we won't find it and everything goes sideways. So fix
this by putting it back and put a giant comment there to keep me from trying
to remove it in the future. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Fri, 8 Jun 2012 19:16:12 +0000 (15:16 -0400)]
Btrfs: keep inode pinned when compressing writes
A user reported lots of problems using compression on the new code and it
turns out part of the problem was that igrab() was failing when we added a
new ordered extent. This is because when writing out an inode under
compression we immediately return without actually doing anything to the
pages, and then in another thread at some point down the line actually do
the ordered dance. The problem is between the point that we start writeback
and we actually add the ordered extent we could be trying to reclaim the
inode, which makes igrab() return NULL. So we need to do an igrab() when we
create the async extent and then drop it when we are done with it. This
makes sure we stay pinned in memory until the ordered extent can get a
reference on it and we are good to go. With this patch we no longer panic
in btrfs_finish_ordered_io(). Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Tue, 5 Jun 2012 18:13:12 +0000 (14:13 -0400)]
Btrfs: implement ->show_devname
Because btrfs can remove the device that was mounted we need to have a
->show_devname so that in this case we can print out some other device in
the file system to /proc/mount. So if there are multiple devices in a btrfs
file system we will just print the device with the lowest devid that we can
find. This will make everything consistent and deal with device removal
properly. The drawback is if you mount with a device that is higher than
the lowest devicd it won't show up as the mounted device in /proc/mounts,
but this is a small price to pay. This was inspired by Miao Xie's patch.
Thanks,
Reviewed-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Mon, 4 Jun 2012 18:03:51 +0000 (14:03 -0400)]
Btrfs: use rcu to protect device->name
Al pointed out that we can just toss out the old name on a device and add a
new one arbitrarily, so anybody who uses device->name in printk could
possibly use free'd memory. Instead of adding locking around all of this he
suggested doing it with RCU, so I've introduced a struct rcu_string that
does just that and have gone through and protected all accesses to
device->name that aren't under the uuid_mutex with rcu_read_lock(). This
protects us and I will use it for dealing with removing the device that we
used to mount the file system in a later patch. Thanks,
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Thu, 31 May 2012 19:58:55 +0000 (15:58 -0400)]
Btrfs: unlock everything properly in the error case for nocow
I was getting hung on umount when a transaction was aborted because a range
of one of the free space inodes was still locked. This is because the nocow
stuff doesn't unlock anything on error. This fixed the problem and I
verified that is what was happening. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Thu, 31 May 2012 19:54:30 +0000 (15:54 -0400)]
Btrfs: fix btrfs_destroy_marked_extents
So we're forcing the eb's to have their ref count set to 1 so invalidatepage
works but this breaks lots of things, for example root nodes, and is just
plain wrong, we don't need to just evict all of this stuff. Also drop the
invalidatepage altogether and add a page_cache_release(). With this patch
we no longer hang when trying to access the root nodes after an aborted
transaction and we no longer leak memory. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Thu, 31 May 2012 19:52:43 +0000 (15:52 -0400)]
Btrfs: abort the transaction if the commit fails
If a transaction commit fails we don't abort it so we don't set an error on
the file system. This patch fixes that by actually calling the abort stuff
and then adding a check for a fs error in the transaction start stuff to
make sure it is caught properly. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Thu, 31 May 2012 19:49:57 +0000 (15:49 -0400)]
Btrfs: wake up transaction waiters when aborting a transaction
I was getting lots of hung tasks and a NULL pointer dereference because we
are not cleaning up the transaction properly when it aborts. First we need
to reset the running_transaction to NULL so we don't get a bad dereference
for any start_transaction callers after this. Also we cannot rely on
waitqueue_active() since it's just a list_empty(), so just call wake_up()
directly since that will do the barrier for us and such. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Thu, 31 May 2012 15:06:33 +0000 (11:06 -0400)]
Btrfs: fix locking in btrfs_destroy_delayed_refs
The transaction abort stuff was throwing warnings from the list debugging
code because we do a list_del_init outside of the delayed_refs spin lock.
The delayed refs locking makes baby Jesus cry so it's not hard to get wrong,
but we need to take the ref head mutex to make sure it's not being processed
currently, and so if it is we need to drop the spin lock and then take and
drop the mutex and do the search again. If we can take the mutex then we
can safely remove the head from the list and carry on. Now when the
transaction aborts I don't get the list debugging warnings. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Josef Bacik [Wed, 30 May 2012 19:35:17 +0000 (15:35 -0400)]
Btrfs: pass locked_page into extent_clear_unlock_delalloc if theres an error
While doing my enospc work I got a transaction abortion that resulted in a
panic when we tried to unlock_page() an already unlocked page. This is
because we aren't calling extent_clear_unlock_delalloc with the locked page
so it was unlocking all the pages in the range. This is wrong since
__extent_writepage expects to have the page locked still unless we return
*page_started as 1. This should keep us from panicing. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Daniel Mack [Tue, 12 Jun 2012 18:23:52 +0000 (20:23 +0200)]
USB: fix gathering of interface associations
TEAC's UD-H01 (and probably other devices) have a gap in the interface
number allocation of their descriptors:
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 220
bNumInterfaces 3
[...]
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
[...]
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 2
bInterfaceCount 2
bFunctionClass 1 Audio
bFunctionSubClass 0
bFunctionProtocol 32
iFunction 4
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
[...]
Once a configuration is selected, usb_set_configuration() walks the
known interfaces of a given configuration and calls find_iad() on
each of them to set the interface association pointer the interface
is included in.
The problem here is that the loop variable is taken for the interface
number in the comparison logic that gathers the association. Which is
fine as long as the descriptors are sane.
In the case above, however, the logic gets out of sync and the
interface association fields of all interfaces beyond the interface
number gap are wrong.
Fix this by passing the interface's bInterfaceNumber to find_iad()
instead.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Reported-by: bEN <ml_all@circa.be>
Reported-by: Ivan Perrone <ivanperrone@hotmail.com>
Tested-by: ivan perrone <ivanperrone@hotmail.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Shimoda, Yoshihiro [Tue, 12 Jun 2012 00:34:33 +0000 (09:34 +0900)]
usb: ehci-sh: fix illegal phy_init() running when platform_data is NULL
If the platform_data is not set, pdata will be uninitialized value.
Since the driver has the following code, if the condition is true when
the pdata is uninitialized value, the driver may jump to the illegal
phy_init().
if (pdata && pdata->phy_init)
pdata->phy_init();
This patch also fixes the following warning:
CC drivers/usb/host/ehci-hcd.o
drivers/usb/host/ehci-sh.c: In function ‘ehci_hcd_sh_probe’:
drivers/usb/host/ehci-sh.c:104: warning: ‘pdata’ may be used uninitialized in this function
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Otto Meta [Wed, 6 Jun 2012 16:46:21 +0000 (18:46 +0200)]
usb: cdc-acm: fix devices not unthrottled on open
Currently CDC-ACM devices stay throttled when their TTY is closed while
throttled, stalling further communication attempts after the next open.
Unthrottling during open/activate got lost starting with kernel
3.0.0 and this patch reintroduces it.
Signed-off-by: Otto Meta <otto.patches@sister-shadow.de>
Cc: stable <stable@vger.kernel.org>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stefano Stabellini [Wed, 23 May 2012 17:57:20 +0000 (18:57 +0100)]
xen: mark local pages as FOREIGN in the m2p_override
When the frontend and the backend reside on the same domain, even if we
add pages to the m2p_override, these pages will never be returned by
mfn_to_pfn because the check "get_phys_to_machine(pfn) != mfn" will
always fail, so the pfn of the frontend will be returned instead
(resulting in a deadlock because the frontend pages are already locked).
INFO: task qemu-system-i38:1085 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
qemu-system-i38 D
ffff8800cfc137c0 0 1085 1 0x00000000
ffff8800c47ed898 0000000000000282 ffff8800be4596b0 00000000000137c0
ffff8800c47edfd8 ffff8800c47ec010 00000000000137c0 00000000000137c0
ffff8800c47edfd8 00000000000137c0 ffffffff82213020 ffff8800be4596b0
Call Trace:
[<
ffffffff81101ee0>] ? __lock_page+0x70/0x70
[<
ffffffff81a0fdd9>] schedule+0x29/0x70
[<
ffffffff81a0fe80>] io_schedule+0x60/0x80
[<
ffffffff81101eee>] sleep_on_page+0xe/0x20
[<
ffffffff81a0e1ca>] __wait_on_bit_lock+0x5a/0xc0
[<
ffffffff81101ed7>] __lock_page+0x67/0x70
[<
ffffffff8106f750>] ? autoremove_wake_function+0x40/0x40
[<
ffffffff811867e6>] ? bio_add_page+0x36/0x40
[<
ffffffff8110b692>] set_page_dirty_lock+0x52/0x60
[<
ffffffff81186021>] bio_set_pages_dirty+0x51/0x70
[<
ffffffff8118c6b4>] do_blockdev_direct_IO+0xb24/0xeb0
[<
ffffffff811e71a0>] ? ext3_get_blocks_handle+0xe00/0xe00
[<
ffffffff8118ca95>] __blockdev_direct_IO+0x55/0x60
[<
ffffffff811e71a0>] ? ext3_get_blocks_handle+0xe00/0xe00
[<
ffffffff811e91c8>] ext3_direct_IO+0xf8/0x390
[<
ffffffff811e71a0>] ? ext3_get_blocks_handle+0xe00/0xe00
[<
ffffffff81004b60>] ? xen_mc_flush+0xb0/0x1b0
[<
ffffffff81104027>] generic_file_aio_read+0x737/0x780
[<
ffffffff813bedeb>] ? gnttab_map_refs+0x15b/0x1e0
[<
ffffffff811038f0>] ? find_get_pages+0x150/0x150
[<
ffffffff8119736c>] aio_rw_vect_retry+0x7c/0x1d0
[<
ffffffff811972f0>] ? lookup_ioctx+0x90/0x90
[<
ffffffff81198856>] aio_run_iocb+0x66/0x1a0
[<
ffffffff811998b8>] do_io_submit+0x708/0xb90
[<
ffffffff81199d50>] sys_io_submit+0x10/0x20
[<
ffffffff81a18d69>] system_call_fastpath+0x16/0x1b
The explanation is in the comment within the code:
We need to do this because the pages shared by the frontend
(xen-blkfront) can be already locked (lock_page, called by
do_read_cache_page); when the userspace backend tries to use them
with direct_IO, mfn_to_pfn returns the pfn of the frontend, so
do_blockdev_direct_IO is going to try to lock the same pages
again resulting in a deadlock.
A simplified call graph looks like this:
pygrub QEMU
-----------------------------------------------
do_read_cache_page io_submit
| |
lock_page ext3_direct_IO
|
bio_add_page
|
lock_page
Internally the xen-blkback uses m2p_add_override to swizzle (temporarily)
a 'struct page' to have a different MFN (so that it can point to another
guest). It also can easily find out whether another pfn corresponding
to the mfn exists in the m2p, and can set the FOREIGN bit
in the p2m, making sure that mfn_to_pfn returns the pfn of the backend.
This allows the backend to perform direct_IO on these pages, but as a
side effect prevents the frontend from using get_user_pages_fast on
them while they are being shared with the backend.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
J. Bruce Fields [Tue, 12 Jun 2012 12:28:48 +0000 (08:28 -0400)]
nfsd4: BUG_ON(!is_spin_locked()) no good on UP kernels
Most frequent symptom was a BUG triggering in expire_client, with the
server locking up shortly thereafter.
Introduced by
508dc6e110c6dbdc0bbe84298ccfe22de7538486 "nfsd41:
free_session/free_client must be called under the client_lock".
Cc: stable@kernel.org
Cc: Benny Halevy <bhalevy@tonian.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Stanislav Kinsbursky [Fri, 1 Jun 2012 09:55:47 +0000 (13:55 +0400)]
NFS: hard-code init_net for NFS callback transports
In case of destroying mount namespace on child reaper exit, nsproxy is zeroed
to the point already. So, dereferencing of it is invalid.
This patch hard-code "init_net" for all network namespace references for NFS
callback services. This will be fixed with proper NFS callback
containerization.
Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Jan Schmidt [Mon, 11 Jun 2012 08:52:38 +0000 (10:52 +0200)]
Btrfs: fix race in tree mod log addition
When adding to the tree modification log, we grab two locks at different
stages. We must not drop the outer lock until we're done with section
protected by the inner lock. This moves the unlock call for the outer lock
to the appropriate position.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Jan Schmidt [Mon, 11 Jun 2012 06:29:29 +0000 (08:29 +0200)]
Btrfs: add btrfs_next_old_leaf
To make sense of the tree mod log, the backref walker not only needs
btrfs_search_old_slot, but it also called btrfs_next_leaf, which in turn was
calling btrfs_search_slot. This obviously didn't give the correct result.
This commit adds btrfs_next_old_leaf, a drop-in replacement for
btrfs_next_leaf with a time_seq parameter. If it is zero, it behaves exactly
like btrfs_next_leaf. If it is non-zero, it will use btrfs_search_old_slot
with this time_seq parameter.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Jan Schmidt [Tue, 5 Jun 2012 14:41:24 +0000 (16:41 +0200)]
Btrfs: fix return value for __tree_mod_log_oldest_root
In __tree_mod_log_oldest_root() we must return the found operation even if
it's not a ROOT_REPLACE operation. Otherwise, the caller assumes that there
are no operations to be rewinded and returns immediately.
The code in the caller is modified to improve readability.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Jan Schmidt [Mon, 4 Jun 2012 14:54:57 +0000 (16:54 +0200)]
Btrfs: use btrfs_read_lock_root_node in get_old_root
get_old_root could race with root node updates because we weren't locking
the node early enough. Use btrfs_read_lock_root_node to grab the root locked
in the very beginning and release the lock as soon as possible (just like
btrfs_search_slot does).
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Jan Schmidt [Thu, 14 Jun 2012 14:10:13 +0000 (16:10 +0200)]
Btrfs: remove obsolete btrfs_next_leaf call from __resolve_indirect_ref
When resolving indirect refs, we used to call btrfs_next_leaf in case we
didn't find an exact match. While we should find exact matches most of the
time, in case we don't, we must continue searching. Treating those matches
differently depending on the level we're searching doesn't make sense.
Even worse, we might end up searching for a key larger than the largest, in
which case there is no next_leaf and subsequent jobs would fail. This commit
drops the bogous lines.
Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Linus Torvalds [Thu, 14 Jun 2012 12:46:59 +0000 (15:46 +0300)]
Merge git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fix from Marcelo Tosatti:
"Fix a spurious warning on CPU offline path"
* git://git.kernel.org/pub/scm/virt/kvm/kvm:
x86: kvmclock: remove check_and_clear_guest_paused warning
Linus Torvalds [Thu, 14 Jun 2012 12:43:32 +0000 (15:43 +0300)]
Merge tag 'pinctrl-fixes-for-v3.5' of git://git./linux/kernel/git/linusw/linux-pinctrl
Pull pinctrl fixes from Linus Walleij:
- section markup fixes
- clk_prepare() fix to conform to the clk API
- memory leaks
- incorrect debug messages
- bad errorpaths
- typos
* tag 'pinctrl-fixes-for-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: pinctrl-mxs: set platform driver data to NULL at errpath and at unregister
pinctrl: pinctrl-mxs: Take care of frees if the kzalloc fails
pinctrl: pinctrl-imx: fix incorrect debug message of maps
pinctrl: pinctrl-imx: free if of_get_parent fails to get the parent node
pinctrl: pinctrl-imx: free allocated pinctrl_map structure only once and use kernel facilities for IMX_PMX_DUMP
pinctrl: nomadik: fix up typo
pinctrl: nomadik: add clk_prepare() call
pinctrl: fix a minor harmless typo
pinctrl: sirf: mark of_device_id match table as __devinitconst
Linus Torvalds [Thu, 14 Jun 2012 12:38:48 +0000 (15:38 +0300)]
Merge tag 'sound-3.5' of git://git./linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
- Fix a regression of USB-audio PCM assignment since 3.4
- A few VGA-switcheroo-related fixes for proper HDMI audio enablement
- Fixed the missing initializations of HD-audio verbs, which may have
resulted in various breakage
- Some driver-specific ASoC updates
- A few fixes for the dynamic PCM code
- The addition of pinctrl support for the i.MX audmux which didn't make
it into -rc1 due to cross tree dependency issues
- A few minor fixes in compress API codes
* tag 'sound-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Don't forget to call init verbs added by fixup list
ALSA: HDA: Pin fixup for Zotac Z68 motherboard
ALSA: compress_core: cleanup pointers on stop
ALSA: compress_core: don't wake up on pause
ALSA: hda - Fix detection of Creative SoundCore3D controllers
vga_switcheroo: Enable/disable audio clients at the right time
ALSA: hda - HDMI Audio init all connectors when VGA-switcheroo is off
vga_switcheroo: Fix error without CONFIG_VGA_SWITCHEROO
ALSA: hda - Fix uninitialized HDMI controllers with VGA-switcheroo
vga_switcheroo: Add a helper function to get the client state
ALSA: usb-audio: Fix substream assignments
ASoC: tegra: add MODULE_DEVICE_TABLE to tegra30_ahub
ASoC: wm2000: Always use a 4s timeout for the firmware
ASoC: dapm: Fix input list to use source widgets
ASoC: dpcm: Fix dpcm_get_be() to check that DAI is BE
ASoC: wm8994: Apply volume updates with clocks enabled
ASoC: wm8994: Ensure all AIFnCLK events are run from the _late variants
ASoC: imx-audmux: add pinctrl support
ASoC: dapm: Fix connected widget capture path query.
Linus Torvalds [Thu, 14 Jun 2012 12:33:55 +0000 (15:33 +0300)]
Merge git://git./linux/kernel/git/davem/net
Pull networking fixes from David S. Miller:
This has the fix for the wireless issues I ran into the other week as
well as:
1) Fix CAN c_can driver transmit handling resulting in BUG check
triggers, from AnilKumar Ch.
2) Fix packet drop monitor sleeping in atomic context, from Eric
Dumazet.
3) Fix mv643xx_eth driver build regression, from Andrew Lunn.
4) Inetpeer freeing needs an RCU grace period in order to avoid races
during tree invalidation. From Eric Dumazet.
5) Fix endianness bugs in xt_HMARK netfilter module, from Hans
Schillstrom.
6) Add proper module refcounting to l2tp_eth to avoid crash on module
unload, from Eric Dumazet.
7) Fix truncation of neighbour entry dumps due to logic errors in
neigh_dump_info() and friends, from Eric Dumazet.
8) The conversion of fib6_age() to dst_neigh_lookup() accidently
reversed the logic of a flags test, fix from Thomas Graf.
9) Fix checksum configuration in newer sky2 chips, from Stephen
Hemminger.
10) Revert BQL support in NIU driver, doesn't work.
11) l2tp_ip_sendmsg() illegally uses a route without a proper reference.
From Eric Dumazet.
12) be2net driver references an SKB after it's potentially been freed,
also from Eric Dumazet.
13) Fix RCU stalls in dummy net driver init. Also from Eric Dumazet.
14) lpc_eth has several bugs in it's transmit engine leading to packet
leaks and improper queue wakes, from Eric Dumazet.
15) Apply short DMA workaround to more tg3 chips, from Matt Carlson.
16) Add tilegx network driver.
17) Bonding queue mapping for a packet can get corrupted, fix from Eric
Dumazet.
18) Fix bug in netpoll_send_udp() SKB management that can leave garbage
in the payload in certain situations. From Eric Dumazet.
19) bnx2x driver interprets chip RX checksum offload incorrectly in
encapsulation situations. Fix from Eric Dumazet.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (75 commits)
bnx2x: fix checksum validation
netpoll: fix netpoll_send_udp() bugs
bonding: Fix corrupted queue_mapping
bonding:record primary when modify it via sysfs
tilegx network driver: initial support
tg3: Apply short DMA frag workaround to 5906
net: stmmac: Fix clock en-/disable calls
lpc_eth: fix tx completion
lpc_eth: add missing ndo_change_mtu()
dummy: fix rcu_sched self-detected stalls
net: Reorder initialization in ip_route_output to fix gcc warning
virtio-net: fix a race on 32bit arches
r8169: avoid NAPI scheduling delay.
net: Make linux/tcp.h C++ friendly (trivial)
netdev: fix drivers/net/phy/ kernel-doc warnings
net/core: fix kernel-doc warnings
be2net: fix a race in be_xmit()
l2tp: fix a race in l2tp_ip_sendmsg()
mac80211: add back channel change flag
NFC: Fix possible NULL ptr deref when getting the name of a socket
...
Marek Szyprowski [Thu, 14 Jun 2012 12:01:30 +0000 (14:01 +0200)]
x86: dma-mapping: fix broken allocation when dma_mask has been provided
Commit
0a2b9a6ea93 ("X86: integrate CMA with DMA-mapping subsystem")
broke memory allocation with dma_mask. This patch fixes possible kernel
ops caused by lack of resetting page variable when jumping to 'again' label.
Reported-by: Konrad Rzeszutek Wilk <konrad@darnok.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Don Zickus [Wed, 13 Jun 2012 13:35:48 +0000 (09:35 -0400)]
watchdog: Quiet down the boot messages
A bunch of bugzillas have complained how noisy the nmi_watchdog
is during boot-up especially with its expected failure cases
(like virt and bios resource contention).
This is my attempt to quiet them down and keep it less confusing
for the end user. What I did is print the message for cpu0 and
save it for future comparisons. If future cpus have an
identical message as cpu0, then don't print the redundant info.
However, if a future cpu has a different message, happily print
that loudly.
Before the change, you would see something like:
..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
CPU0: Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz stepping 0a
Performance Events: PEBS fmt0+, Core2 events, Intel PMU driver.
... version: 2
... bit width: 40
... generic registers: 2
... value mask:
000000ffffffffff
... max period:
000000007fffffff
... fixed-purpose events: 3
... event mask:
0000000700000003
NMI watchdog enabled, takes one hw-pmu counter.
Booting Node 0, Processors #1
NMI watchdog enabled, takes one hw-pmu counter.
#2
NMI watchdog enabled, takes one hw-pmu counter.
#3 Ok.
NMI watchdog enabled, takes one hw-pmu counter.
Brought up 4 CPUs
Total of 4 processors activated (22607.24 BogoMIPS).
After the change, it is simplified to:
..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
CPU0: Intel(R) Core(TM)2 Quad CPU Q9550 @ 2.83GHz stepping 0a
Performance Events: PEBS fmt0+, Core2 events, Intel PMU driver.
... version: 2
... bit width: 40
... generic registers: 2
... value mask:
000000ffffffffff
... max period:
000000007fffffff
... fixed-purpose events: 3
... event mask:
0000000700000003
NMI watchdog: enabled on all CPUs, permanently consumes one hw-PMU counter.
Booting Node 0, Processors #1 #2 #3 Ok.
Brought up 4 CPUs
V2: little changes based on Joe Perches' feedback
V3: printk cleanup based on Ingo's feedback; checkpatch fix
V4: keep printk as one long line
V5: Ingo fix ups
Reported-and-tested-by: Nathan Zimmer <nzimmer@sgi.com>
Signed-off-by: Don Zickus <dzickus@redhat.com>
Cc: nzimmer@sgi.com
Cc: joe@perches.com
Link: http://lkml.kernel.org/r/1339594548-17227-1-git-send-email-dzickus@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Anand Gadiyar [Tue, 5 Jun 2012 12:34:27 +0000 (15:34 +0300)]
Fix OMAP EHCI suspend/resume failure (i693)
Its observed with some PHY, the 60Mhz clock gets
cut too soon for OMAP EHCI, leaving OMAP-EHCI in a bad state.
So on starting port suspend, make sure the 60Mhz clock to EHCI
is kept alive using an internal clock, so that EHCi can cleanly
transition its hw state machine on a port suspend.
Its not proven if this is the issue hit on USB3333,
but the symptoms look very similar.
Signed-off-by: Anand Gadiyar <gadiyar@ti.com>
Signed-off-by: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Volodymyr Mieshkov <x0182794@ti.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Roland Stigge [Mon, 11 Jun 2012 19:38:29 +0000 (21:38 +0200)]
USB: ohci-hub: Mark ohci_finish_controller_resume() as __maybe_unused
ohci_finish_controller_resume() is intended to be used in platform specific
drivers ohci-*.c, included from ohci-hcd.c. Some of them don't actually use
ohci_finish_controller_resume(), so mark it as __maybe_unused.
Signed-off-by: Roland Stigge <stigge@antcom.de>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jan Safrata [Tue, 22 May 2012 12:04:50 +0000 (14:04 +0200)]
usb: use usb_serial_put in usb_serial_probe errors
The use of kfree(serial) in error cases of usb_serial_probe
was invalid - usb_serial structure allocated in create_serial()
gets reference of usb_device that needs to be put, so we need
to use usb_serial_put() instead of simple kfree().
Signed-off-by: Jan Safrata <jan.nikitenko@gmail.com>
Acked-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Herton Ronaldo Krzesinski [Tue, 22 May 2012 16:47:25 +0000 (13:47 -0300)]
USB: EHCI: Fix build warning in xilinx ehci driver
This fixes the following warning:
In file included from drivers/usb/host/ehci-hcd.c:1246:0:
drivers/usb/host/ehci-xilinx-of.c:293:2: warning: initialization from incompatible pointer type [enabled by default]
drivers/usb/host/ehci-xilinx-of.c:293:2: warning: (near initialization for 'ehci_hcd_xilinx_of_driver.shutdown') [enabled by default]
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ricardo Martins [Tue, 22 May 2012 17:02:03 +0000 (18:02 +0100)]
USB: fix PS3 EHCI systems
After commit
aaa0ef289afe9186f81e2340114ea413eef0492a "PS3 EHCI QH
read work-around", Terratec Grabby (em28xx) stopped working with AMD
Geode LX 800 (USB controller AMD CS5536). Since this is a PS3 only
fix, the following patch adds a conditional block around it.
Signed-off-by: Ricardo Martins <rasm@fe.up.pt>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Greg Kroah-Hartman [Thu, 14 Jun 2012 00:23:12 +0000 (17:23 -0700)]
Merge tag 'for-usb-linus-2012-06-13' of git://git./linux/kernel/git/sarah/xhci into usb-linus
xhci: Bug fixes for 3.5
Hi Greg,
Here's five bug fixes for 3.5. They fix some memory leaks in the
bandwidth calculation code, fix a couple bugs in the USB3 Link PM
patchset, and make system suspend and resume work on platforms with the
AsMedia ASM1042 xHCI host controller.
Sarah Sharp
Andiry Xu [Wed, 13 Jun 2012 02:51:57 +0000 (10:51 +0800)]
xHCI: Increase the timeout for controller save/restore state operation
When system software decides to power down the xHC with the intent of
resuming operation at a later time, it will ask xHC to save the internal
state and restore it when resume to correctly recover from a power event.
Two bits are used to enable this operation: Save State and Restore State.
xHCI spec 4.23.2 says software should "Set the Controller Save/Restore
State flag in the USBCMD register and wait for the Save/Restore State
Status flag in the USBSTS register to transition to '0'". However, it does
not define how long software should wait for the SSS/RSS bit to transition
to 0.
Currently the timeout is set to 1ms. There is bug report
(https://bugs.launchpad.net/ubuntu/+source/linux/+bug/
1002697)
indicates that the timeout is too short for ASMedia ASM1042 host controller
to save/restore the state successfully. Increase the timeout to 10ms helps to
resolve the issue.
This patch should be backported to stable kernels as old as 2.6.37, that
contain the commit
5535b1d5f8885695c6ded783c692e3c0d0eda8ca "USB: xHCI:
PCI power management implementation"
Signed-off-by: Andiry Xu <andiry.xu@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Ming Lei <ming.lei@canonical.com>
Cc: stable@vger.kernel.org
Takashi Iwai [Fri, 1 Jun 2012 08:06:24 +0000 (10:06 +0200)]
xhci: Don't free endpoints in xhci_mem_cleanup()
This patch fixes a few issues introduced in the recent fix
[
f8a9e72d: USB: fix resource leak in xhci power loss path]
- The endpoints listed in bw table are just links and each entry is an
array member of dev->eps[]. But the commit above adds a kfree() call
to these instances, and thus it results in memory corruption.
- It clears only the first entry of rh_bw[], but there can be multiple
ports.
- It'd be safer to clear the list_head of ep as well, not only
removing from the list, as it's checked in
xhci_discover_or_reset_device().
This patch should be backported to kernels as old as 3.2, that contain
the commit
839c817ce67178ca3c7c7ad534c571bba1e69ebe "xhci: Store
information about roothubs and TTs."
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reviewed-by: Oliver Neukum <oneukum@suse.de>
Cc: <stable@vger.kernel.org>
Takashi Iwai [Fri, 1 Jun 2012 08:06:23 +0000 (10:06 +0200)]
xhci: Fix invalid loop check in xhci_free_tt_info()
xhci_free_tt_info() may access the invalid memory when it removes the
last entry but the list is not empty. Then tt_next reaches to the
list head but it still tries to check the tt_info of that entry.
This patch fixes the bug and cleans up the messy code by rewriting
with a simple list_for_each_entry_safe().
This patch should be backported to kernels as old as 3.2, that contain
the commit
839c817ce67178ca3c7c7ad534c571bba1e69ebe "xhci: Store
information about roothubs and TTs."
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reviewed-by: Oliver Neukum <oneukum@suse.de>
Cc: <stable@vger.kernel.org>
Sarah Sharp [Thu, 7 Jun 2012 18:10:32 +0000 (11:10 -0700)]
xhci: Fix error path return value.
This patch fixes an issue discovered by Dan Carpenter:
The patch
3b3db026414b: "xhci: Add infrastructure for host-specific
LPM policies." from May 9, 2012, leads to the following warning:
drivers/usb/host/xhci.c:3909 xhci_get_timeout_no_hub_lpm()
warn: signedness bug returning '-22'
3906 default:
3907 dev_warn(&udev->dev, "%s: Can't get timeout for non-U1 or U2 state.\n",
3908 __func__);
3909 return -EINVAL;
^^^^^^^^^^^^^^
This should be a u16 like USB3_LPM_DISABLED or something.
3910 }
3911
3912 if (sel <= max_sel_pel && pel <= max_sel_pel)
3913 return USB3_LPM_DEVICE_INITIATED;
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Dan Carpenter [Tue, 22 May 2012 17:54:34 +0000 (20:54 +0300)]
USB: Checking the wrong variable in usb_disable_lpm()
We check "u1_params" instead of checking "u2_params".
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Hans de Goede [Wed, 13 Jun 2012 09:44:58 +0000 (11:44 +0200)]
usb-storage: Add 090c:1000 to unusal-devs
This device gives a bogus answer to get_capacity(16):
[ 8628.278614] scsi 8:0:0:0: Direct-Access USB 2.0 USB Flash Drive 1100 PQ: 0 ANSI: 4
[ 8628.279452] sd 8:0:0:0: Attached scsi generic sg4 type 0
[ 8628.280338] sd 8:0:0:0: [sdd]
35747322042253313 512-byte logical blocks: (18.3 EB/15.8 EiB)
So set the quirk flag to avoid using get_capacity(16) with it:
[11731.386014] usb-storage 2-1.6:1.0: Quirks match for vid 090c pid 1000: 80000
[11731.386075] scsi9 : usb-storage 2-1.6:1.0
[11731.386172] usbcore: registered new interface driver usb-storage
[11731.386175] USB Mass Storage support registered.
[11732.387394] scsi 9:0:0:0: Direct-Access USB 2.0 USB Flash Drive 1100 PQ: 0 ANSI: 4
[11732.388462] sd 9:0:0:0: Attached scsi generic sg3 type 0
[11732.389432] sd 9:0:0:0: [sdc]
7975296 512-byte logical blocks: (4.08 GB/3.80 GiB)
Which makes the capacity look a lot more sane :)
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Tested-by: Simon Raffeiner <sturmflut@lieberbiber.de>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Dumazet [Tue, 12 Jun 2012 23:50:04 +0000 (23:50 +0000)]
bnx2x: fix checksum validation
bnx2x driver incorrectly sets ip_summed to CHECKSUM_UNNECESSARY on
encapsulated segments. TCP stack happily accepts frames with bad
checksums, if they are inside a GRE or IPIP encapsulation.
Our understanding is that if no IP or L4 csum validation was done by the
hardware, we should leave ip_summed as is (CHECKSUM_NONE), since
hardware doesn't provide CHECKSUM_COMPLETE support in its cqe.
Then, if IP/L4 checksumming was done by the hardware, set
CHECKSUM_UNNECESSARY if no error was flagged.
Patch based on findings and analysis from Robert Evans
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Eilon Greenstein <eilong@broadcom.com>
Cc: Yaniv Rosner <yanivr@broadcom.com>
Cc: Merav Sicron <meravs@broadcom.com>
Cc: Tom Herbert <therbert@google.com>
Cc: Robert Evans <evansr@google.com>
Cc: Willem de Bruijn <willemb@google.com>
Acked-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Tue, 12 Jun 2012 19:30:21 +0000 (19:30 +0000)]
netpoll: fix netpoll_send_udp() bugs
Bogdan Hamciuc diagnosed and fixed following bug in netpoll_send_udp() :
"skb->len += len;" instead of "skb_put(skb, len);"
Meaning that _if_ a network driver needs to call skb_realloc_headroom(),
only packet headers would be copied, leaving garbage in the payload.
However the skb_realloc_headroom() must be avoided as much as possible
since it requires memory and netpoll tries hard to work even if memory
is exhausted (using a pool of preallocated skbs)
It appears netpoll_send_udp() reserved 16 bytes for the ethernet header,
which happens to work for typicall drivers but not all.
Right thing is to use LL_RESERVED_SPACE(dev)
(And also add dev->needed_tailroom of tailroom)
This patch combines both fixes.
Many thanks to Bogdan for raising this issue.
Reported-by: Bogdan Hamciuc <bogdan.hamciuc@freescale.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Tested-by: Bogdan Hamciuc <bogdan.hamciuc@freescale.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Neil Horman <nhorman@tuxdriver.com>
Reviewed-by: Neil Horman <nhorman@tuxdriver.com>
Reviewed-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Alan Stern [Thu, 31 May 2012 21:03:52 +0000 (17:03 -0400)]
USB: serial-generic: use a single set of device IDs
The usb-serial-generic driver uses different device IDs for its USB
matching and its serial matching. This can lead to problems: The
driver can end up getting bound to a USB interface without being
allowed to bind to the corresponding serial port.
This patch (as1557) fixes the problem by using the same device ID
table (the one that can be altered by the "vendor=" and "product="
module parameters) for both purposes. The unused table is removed.
Now the driver will bind only to the intended devices.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bjørn Mork [Wed, 30 May 2012 08:00:14 +0000 (10:00 +0200)]
USB: serial: Enforce USB driver and USB serial driver match
We need to make sure that the USB serial driver we find
matches the USB driver whose probe we are currently
executing. Otherwise we will end up with USB serial
devices bound to the correct serial driver but wrong
USB driver.
An example of such cross-probing, where the usbserial_generic
USB driver has found the sierra serial driver:
May 29 18:26:15 nemi kernel: [ 4442.559246] usbserial_generic 4-4:1.0: Sierra USB modem converter detected
May 29 18:26:20 nemi kernel: [ 4447.556747] usbserial_generic 4-4:1.2: Sierra USB modem converter detected
May 29 18:26:25 nemi kernel: [ 4452.557288] usbserial_generic 4-4:1.3: Sierra USB modem converter detected
sysfs view of the same problem:
bjorn@nemi:~$ ls -l /sys/bus/usb/drivers/sierra/
total 0
--w------- 1 root root 4096 May 29 18:23 bind
lrwxrwxrwx 1 root root 0 May 29 18:23 module -> ../../../../module/usbserial
--w------- 1 root root 4096 May 29 18:23 uevent
--w------- 1 root root 4096 May 29 18:23 unbind
bjorn@nemi:~$ ls -l /sys/bus/usb-serial/drivers/sierra/
total 0
--w------- 1 root root 4096 May 29 18:23 bind
lrwxrwxrwx 1 root root 0 May 29 18:23 module -> ../../../../module/sierra
-rw-r--r-- 1 root root 4096 May 29 18:23 new_id
lrwxrwxrwx 1 root root 0 May 29 18:32 ttyUSB0 -> ../../../../devices/pci0000:00/0000:00:1d.7/usb4/4-4/4-4:1.0/ttyUSB0
lrwxrwxrwx 1 root root 0 May 29 18:32 ttyUSB1 -> ../../../../devices/pci0000:00/0000:00:1d.7/usb4/4-4/4-4:1.2/ttyUSB1
lrwxrwxrwx 1 root root 0 May 29 18:32 ttyUSB2 -> ../../../../devices/pci0000:00/0000:00:1d.7/usb4/4-4/4-4:1.3/ttyUSB2
--w------- 1 root root 4096 May 29 18:23 uevent
--w------- 1 root root 4096 May 29 18:23 unbind
bjorn@nemi:~$ ls -l /sys/bus/usb/drivers/usbserial_generic/
total 0
lrwxrwxrwx 1 root root 0 May 29 18:33 4-4:1.0 -> ../../../../devices/pci0000:00/0000:00:1d.7/usb4/4-4/4-4:1.0
lrwxrwxrwx 1 root root 0 May 29 18:33 4-4:1.2 -> ../../../../devices/pci0000:00/0000:00:1d.7/usb4/4-4/4-4:1.2
lrwxrwxrwx 1 root root 0 May 29 18:33 4-4:1.3 -> ../../../../devices/pci0000:00/0000:00:1d.7/usb4/4-4/4-4:1.3
--w------- 1 root root 4096 May 29 18:33 bind
lrwxrwxrwx 1 root root 0 May 29 18:33 module -> ../../../../module/usbserial
--w------- 1 root root 4096 May 29 18:22 uevent
--w------- 1 root root 4096 May 29 18:33 unbind
bjorn@nemi:~$ ls -l /sys/bus/usb-serial/drivers/generic/
total 0
--w------- 1 root root 4096 May 29 18:33 bind
lrwxrwxrwx 1 root root 0 May 29 18:33 module -> ../../../../module/usbserial
-rw-r--r-- 1 root root 4096 May 29 18:33 new_id
--w------- 1 root root 4096 May 29 18:22 uevent
--w------- 1 root root 4096 May 29 18:33 unbind
So we end up with a mismatch between the USB driver and the
USB serial driver. The reason for the above is simple: The
USB driver probe will succeed if *any* registered serial
driver matches, and will use that serial driver for all
serial driver functions.
This makes ref counting go wrong. We count the USB driver
as used, but not the USB serial driver. This may result
in Oops'es as demonstrated by Johan Hovold <jhovold@gmail.com>:
[11811.646396] drivers/usb/serial/usb-serial.c: get_free_serial 1
[11811.646443] drivers/usb/serial/usb-serial.c: get_free_serial - minor base = 0
[11811.646460] drivers/usb/serial/usb-serial.c: usb_serial_probe - registering ttyUSB0
[11811.646766] usb 6-1: pl2303 converter now attached to ttyUSB0
[11812.264197] USB Serial deregistering driver FTDI USB Serial Device
[11812.264865] usbcore: deregistering interface driver ftdi_sio
[11812.282180] USB Serial deregistering driver pl2303
[11812.283141] pl2303 ttyUSB0: pl2303 converter now disconnected from ttyUSB0
[11812.283272] usbcore: deregistering interface driver pl2303
[11812.301056] USB Serial deregistering driver generic
[11812.301186] usbcore: deregistering interface driver usbserial_generic
[11812.301259] drivers/usb/serial/usb-serial.c: usb_serial_disconnect
[11812.301823] BUG: unable to handle kernel paging request at
f8e7438c
[11812.301845] IP: [<
f8e38445>] usb_serial_disconnect+0xb5/0x100 [usbserial]
[11812.301871] *pde =
357ef067 *pte =
00000000
[11812.301957] Oops: 0000 [#1] PREEMPT SMP
[11812.301983] Modules linked in: usbserial(-) [last unloaded: pl2303]
[11812.302008]
[11812.302019] Pid: 1323, comm: modprobe Tainted: G W 3.4.0-rc7+ #101 Dell Inc. Vostro 1520/0T816J
[11812.302115] EIP: 0060:[<
f8e38445>] EFLAGS:
00010246 CPU: 1
[11812.302130] EIP is at usb_serial_disconnect+0xb5/0x100 [usbserial]
[11812.302141] EAX:
f508a180 EBX:
f508a180 ECX:
00000000 EDX:
f8e74300
[11812.302151] ESI:
f5050800 EDI:
00000001 EBP:
f5141e78 ESP:
f5141e58
[11812.302160] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[11812.302170] CR0:
8005003b CR2:
f8e7438c CR3:
34848000 CR4:
000007d0
[11812.302180] DR0:
00000000 DR1:
00000000 DR2:
00000000 DR3:
00000000
[11812.302189] DR6:
ffff0ff0 DR7:
00000400
[11812.302199] Process modprobe (pid: 1323, ti=
f5140000 task=
f61e2bc0 task.ti=
f5140000)
[11812.302209] Stack:
[11812.302216]
f8e3be0f f8e3b29c f8e3ae00 00000000 f513641c f5136400 f513641c f507a540
[11812.302325]
f5141e98 c133d2c1 00000000 00000000 f509c400 f513641c f507a590 f5136450
[11812.302372]
f5141ea8 c12f0344 f513641c f507a590 f5141ebc c12f0c67 00000000 f507a590
[11812.302419] Call Trace:
[11812.302439] [<
c133d2c1>] usb_unbind_interface+0x51/0x190
[11812.302456] [<
c12f0344>] __device_release_driver+0x64/0xb0
[11812.302469] [<
c12f0c67>] driver_detach+0x97/0xa0
[11812.302483] [<
c12f001c>] bus_remove_driver+0x6c/0xe0
[11812.302500] [<
c145938d>] ? __mutex_unlock_slowpath+0xcd/0x140
[11812.302514] [<
c12f0ff9>] driver_unregister+0x49/0x80
[11812.302528] [<
c1457df6>] ? printk+0x1d/0x1f
[11812.302540] [<
c133c50d>] usb_deregister+0x5d/0xb0
[11812.302557] [<
f8e37c55>] ? usb_serial_deregister+0x45/0x50 [usbserial]
[11812.302575] [<
f8e37c8d>] usb_serial_deregister_drivers+0x2d/0x40 [usbserial]
[11812.302593] [<
f8e3a6e2>] usb_serial_generic_deregister+0x12/0x20 [usbserial]
[11812.302611] [<
f8e3acf0>] usb_serial_exit+0x8/0x32 [usbserial]
[11812.302716] [<
c1080b48>] sys_delete_module+0x158/0x260
[11812.302730] [<
c110594e>] ? mntput+0x1e/0x30
[11812.302746] [<
c145c3c3>] ? sysenter_exit+0xf/0x18
[11812.302746] [<
c107777c>] ? trace_hardirqs_on_caller+0xec/0x170
[11812.302746] [<
c145c390>] sysenter_do_call+0x12/0x36
[11812.302746] Code: 24 02 00 00 e8 dd f3 20 c8 f6 86 74 02 00 00 02 74 b4 8d 86 4c 02 00 00 47 e8 78 55 4b c8 0f b6 43 0e 39 f8 7f a9 8b 53 04 89 d8 <ff> 92 8c 00 00 00 89 d8 e8 0e ff ff ff 8b 45 f0 c7 44 24 04 2f
[11812.302746] EIP: [<
f8e38445>] usb_serial_disconnect+0xb5/0x100 [usbserial] SS:ESP 0068:
f5141e58
[11812.302746] CR2:
00000000f8e7438c
Fix by only evaluating serial drivers pointing back to the
USB driver we are currently probing. This still allows two
or more drivers to match the same device, running their
serial driver probes to sort out which one to use.
Cc: stable@vger.kernel.org # 3.0, 3.2, 3.3, 3.4
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Tested-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linus Torvalds [Wed, 13 Jun 2012 20:19:34 +0000 (23:19 +0300)]
Merge tag 'sh-for-linus' of git://github.com/pmundt/linux-sh
Pull SuperH fixes from Paul Mundt.
* tag 'sh-for-linus' of git://github.com/pmundt/linux-sh:
sh: Kill off additional asm-generic wrappers.
sh: Setup CROSS_COMPILE at the top
sh: Fix up link time defsym warnings.
sh: use the new generic strnlen_user() function
sh: switch to generic strncpy_from_user().
sh: Kill off last dead UBC header
serial: sh-sci: Make probe fail for ports that exceed the maximum count
serial: sh-sci: Fix probe error paths
clocksource: sh_tmu: Use clockevents_config_and_register().
clocksource: sh_tmu: Convert timer lock to raw spinlock.
clocksource: sh_mtu2: Convert timer lock to raw spinlock.
clocksource: sh_cmt: Convert timer lock to raw spinlock.
bug.h: need linux/kernel.h for TAINT_WARN.
sh: convert to kbuild asm-generic support.
sh64: Fix up fallout from generic init_task conversion.
sh: arch/sh/kernel/process.c needs asm/fpu.h for unlazy_fpu().
Linus Torvalds [Wed, 13 Jun 2012 20:18:41 +0000 (23:18 +0300)]
Merge branch 'fixes-for-3.5' of git://git./linux/kernel/git/cooloney/linux-leds
Pull led fixes from Bryan Wu.
* 'fixes-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds:
leds: Make LEDS_ASIC3 and LEDS_RENESAS_TPU depend on LEDS_CLASS=y
leds: fixed a coding style issue.
leds: don't disable blinking when writing the same value to delay_on or delay_off
Linus Torvalds [Wed, 13 Jun 2012 20:17:12 +0000 (23:17 +0300)]
Merge branch 'for-linus' of git://git./linux/kernel/git/geert/linux-m68k
Pull m68k update from Geert Uytterhoeven.
This makes m68k use the generic library functions for the user-space
strn[cpy|len] functions.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k:
m68k: Use generic strncpy_from_user(), strlen_user(), and strnlen_user()
Alan Stern [Wed, 13 Jun 2012 15:20:19 +0000 (11:20 -0400)]
USB: add NO_D3_DURING_SLEEP flag and revert
151b61284776be2
This patch (as1558) fixes a problem affecting several ASUS computers:
The machine crashes or corrupts memory when going into suspend if the
ehci-hcd driver is bound to any controllers. Users have been forced
to unbind or unload ehci-hcd before putting their systems to sleep.
After extensive testing, it was determined that the machines don't
like going into suspend when any EHCI controllers are in the PCI D3
power state. Presumably this is a firmware bug, but there's nothing
we can do about it except to avoid putting the controllers in D3
during system sleep.
The patch adds a new flag to indicate whether the problem is present,
and avoids changing the controller's power state if the flag is set.
Runtime suspend is unaffected; this matters only for system suspend.
However as a side effect, the controller will not respond to remote
wakeup requests while the system is asleep. Hence USB wakeup is not
functional -- but of course, this is already true in the current state
of affairs.
A similar patch has already been applied as commit
151b61284776be2d6f02d48c23c3625678960b97 (USB: EHCI: fix crash during
suspend on ASUS computers). The patch supersedes that one and reverts
it. There are two differences:
The old patch added the flag at the USB level; this patch
adds it at the PCI level.
The old patch applied to all chipsets with the same vendor,
subsystem vendor, and product IDs; this patch makes an
exception for a known-good system (based on DMI information).
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Dâniel Fraga <fragabr@gmail.com>
Tested-by: Andrey Rahmatullin <wrar@wrar.name>
Tested-by: Steven Rostedt <rostedt@goodmis.org>
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / log