Steven Rostedt [Fri, 6 Feb 2009 06:45:16 +0000 (01:45 -0500)]
ring-buffer: use generic version of in_nmi
Impact: clean up
Now that a generic in_nmi is available, this patch removes the
special code in the ring_buffer and implements the in_nmi generic
version instead.
With this change, I was also able to rename the "arch_ftrace_nmi_enter"
back to "ftrace_nmi_enter" and remove the code from the ring buffer.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Steven Rostedt [Fri, 6 Feb 2009 06:14:26 +0000 (01:14 -0500)]
ftrace: change function graph tracer to use new in_nmi
The function graph tracer piggy backed onto the dynamic ftracer
to use the in_nmi custom code for dynamic tracing. The problem
was (as Andrew Morton pointed out) it really only wanted to bail
out if the context of the current CPU was in NMI context. But the
dynamic ftrace in_nmi custom code was true if _any_ CPU happened
to be in NMI context.
Now that we have a generic in_nmi interface, this patch changes
the function graph code to use it instead of the dynamic ftarce
custom code.
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Steven Rostedt [Fri, 6 Feb 2009 05:51:37 +0000 (00:51 -0500)]
nmi: add generic nmi tracking state
This code adds an in_nmi() macro that uses the current tasks preempt count
to track when it is in NMI context. Other parts of the kernel can
use this to determine if the context is in NMI context or not.
This code was inspired by the -rt patch in_nmi version that was
written by Peter Zijlstra, who borrowed that code from
Mathieu Desnoyers.
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Steven Rostedt [Fri, 6 Feb 2009 03:30:07 +0000 (22:30 -0500)]
ftrace, x86: rename in_nmi variable
Impact: clean up
The in_nmi variable in x86 arch ftrace.c is a misnomer.
Andrew Morton pointed out that the in_nmi variable is incremented
by all CPUS. It can be set when another CPU is running an NMI.
Since this is actually intentional, the fix is to rename it to
what it really is: "nmi_running"
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Steven Rostedt [Fri, 6 Feb 2009 00:54:51 +0000 (19:54 -0500)]
ring-buffer: allow tracing_off to be used in core kernel code
tracing_off() is the fastest way to stop recording to the ring buffers.
This may be used in places like panic and die, just before the
ftrace_dump is called.
This patch adds the appropriate CPP conditionals to make it a stub
function when the ring buffer is not configured it.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Steven Rostedt [Thu, 5 Feb 2009 23:43:07 +0000 (18:43 -0500)]
ring-buffer: add NMI protection for spinlocks
Impact: prevent deadlock in NMI
The ring buffers are not yet totally lockless with writing to
the buffer. When a writer crosses a page, it grabs a per cpu spinlock
to protect against a reader. The spinlocks taken by a writer are not
to protect against other writers, since a writer can only write to
its own per cpu buffer. The spinlocks protect against readers that
can touch any cpu buffer. The writers are made to be reentrant
with the spinlocks disabling interrupts.
The problem arises when an NMI writes to the buffer, and that write
crosses a page boundary. If it grabs a spinlock, it can be racing
with another writer (since disabling interrupts does not protect
against NMIs) or with a reader on the same CPU. Luckily, most of the
users are not reentrant and protects against this issue. But if a
user of the ring buffer becomes reentrant (which is what the ring
buffers do allow), if the NMI also writes to the ring buffer then
we risk the chance of a deadlock.
This patch moves the ftrace_nmi_enter called by nmi_enter() to the
ring buffer code. It replaces the current ftrace_nmi_enter that is
used by arch specific code to arch_ftrace_nmi_enter and updates
the Kconfig to handle it.
When an NMI is called, it will set a per cpu variable in the ring buffer
code and will clear it when the NMI exits. If a write to the ring buffer
crosses page boundaries inside an NMI, a trylock is used on the spin
lock instead. If the spinlock fails to be acquired, then the entry
is discarded.
This bug appeared in the ftrace work in the RT tree, where event tracing
is reentrant. This workaround solved the deadlocks that appeared there.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Steven Rostedt [Sun, 8 Feb 2009 00:38:43 +0000 (19:38 -0500)]
trace: remove deprecated entry->cpu
Impact: fix to prevent developers from using entry->cpu
With the new ring buffer infrastructure, the cpu for the entry is
implicit with which CPU buffer it is on.
The original code use to record the current cpu into the generic
entry header, which can be retrieved by entry->cpu. When the
ring buffer was introduced, the users were convert to use the
the cpu number of which cpu ring buffer was in use (this was passed
to the tracers by the iterator: iter->cpu).
Unfortunately, the cpu item in the entry structure was never removed.
This allowed for developers to use it instead of the proper iter->cpu,
unknowingly, using an uninitialized variable. This was not the fault
of the developers, since it would seem like the logical place to
retrieve the cpu identifier.
This patch removes the cpu item from the entry structure and fixes
all the users that should have been using iter->cpu.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Ingo Molnar [Thu, 5 Feb 2009 13:33:31 +0000 (14:33 +0100)]
Merge branches 'tracing/ftrace' and 'linus' into tracing/core
Arnaldo Carvalho de Melo [Wed, 4 Feb 2009 00:05:50 +0000 (22:05 -0200)]
trace: make the trace_event callbacks return enum print_line_t
As they actually all return these enumerators.
Reported-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Arnaldo Carvalho de Melo [Tue, 3 Feb 2009 22:20:41 +0000 (20:20 -0200)]
trace: judicious error checking of trace_seq results
Impact: bugfix and cleanup
Some callsites were returning either TRACE_ITER_PARTIAL_LINE if the
trace_seq routines (trace_seq_printf, etc) returned 0 meaning its buffer
was full, or zero otherwise.
But...
/* Return values for print_line callback */
enum print_line_t {
TRACE_TYPE_PARTIAL_LINE = 0, /* Retry after flushing the seq */
TRACE_TYPE_HANDLED = 1,
TRACE_TYPE_UNHANDLED = 2 /* Relay to other output functions */
};
In other cases the return value was not being relayed at all.
Most of the time it didn't hurt because the page wasn't get filled, but
for correctness sake, handle the return values everywhere.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Wed, 4 Feb 2009 19:45:41 +0000 (20:45 +0100)]
Merge branches 'tracing/blktrace', 'tracing/ftrace', 'tracing/urgent' and 'linus' into tracing/core
Linus Torvalds [Wed, 4 Feb 2009 15:56:25 +0000 (07:56 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/cooloney/blackfin-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: (40 commits)
Blackfin arch: Remove outdated code
Blackfin arch: Fix udelay implementation
Blackfin arch: Update Copyright information
Blackfin arch: Add BF561 PPI POLS, POLC Masks
Blackfin arch: Update CM-BF527 kernel config
Blackfin arch: define bfin_memmap as static since it is only used here
Blackfin arch: cplb mananger: use a do...while loop rather than a for loop
Blackfin arch: fix bug - traps test case 19 for exception 0x2d fails
Blackfin arch: add platform device bfin_mii-bus and KSZ8893M switch driver platform resources to board files
Blackfin arch: build jtag tty driver as a module by default
Blackfin arch: fix 2 bugs related to debug
Blackfin arch: Add ANOMALY_05000380 to BF54x to kill the compile warning
Blackfin arch: Fix bug - 561 SMP kernel can't boot from jffs2
Blackfin arch: base SIC_IWR# programming on whether the MMR exists
Blackfin arch: read SYSCR on newer parts that mirror the bits of SWRST in it
Blackfin arch: fixup board init function name
Blackfin arch: drop CONFIG_I2C_BOARDINFO ifdefs
Blackfin arch: bfin_reset->_bfin_reset redirection no longer needed
Blackfin arch: sync reboot handler with version in u-boot
Blackfin arch: Faster Implementation of csum_tcpudp_nofold()
...
Linus Torvalds [Wed, 4 Feb 2009 15:54:00 +0000 (07:54 -0800)]
Merge git://git./linux/kernel/git/davem/sparc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
sparc64: Kill bogus TPC/address truncation during 32-bit faults.
sparc: fixup for sparseirq changes
sparc64: Validate kernel generated fault addresses on sparc64.
sparc64: On non-Niagara, need to touch NMI watchdog in NOHZ mode.
sparc64: Implement NMI watchdog on capable cpus.
sparc: Probe PMU type and record in sparc_pmu_type.
sparc64: Move generic PCR support code to seperate file.
Linus Torvalds [Wed, 4 Feb 2009 15:52:21 +0000 (07:52 -0800)]
Merge git://git./linux/kernel/git/davem/net-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6:
sunrpc: fix rdma dependencies
e1000: Fix PCI enable to honor the need_ioport flag
sgi-xp: link XPNET's net_device_ops to its net_device structure
pcnet_cs: Fix misuse of the equality operator.
hso: add new device id's
dca: redesign locks to fix deadlocks
cassini/sungem: limit reaches -1, but 0 tested
net: variables reach -1, but 0 tested
qlge: bugfix: Add missing netif_napi_del call.
qlge: bugfix: Add flash offset for second port.
qlge: bugfix: Fix endian issue when reading flash.
udp: increments sk_drops in __udp_queue_rcv_skb()
net: Fix userland breakage wrt. linux/if_tunnel.h
net: packet socket packet_lookup_frame fix
Linus Torvalds [Wed, 4 Feb 2009 15:40:54 +0000 (07:40 -0800)]
Merge branch 'for-linus' of git://git.o-hand.com/linux-mfd
* 'for-linus' of git://git.o-hand.com/linux-mfd:
mfd: Remove non exported references from pcf50633
Michael Hennerich [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Remove outdated code
The removed version with the loop registers saved on the stack was
originally intended to workaround the missing toolchain support for
LoopReg Clobbers.
Since our toolchain now supports these there is no point in keeping this
workaround. And since we don't touch LoopRegs anymore we're no longer
subject for ANOMALY_05000312.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Michael Hennerich [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Fix udelay implementation
Avoid possible overflow during 32*32->32 multiplies.
Reported-by: Marco Reppenhagen <marco.reppenhagen@auerswald.de>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Michael Hennerich [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Update Copyright information
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Michael Hennerich [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Add BF561 PPI POLS, POLC Masks
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Michael Hennerich [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Update CM-BF527 kernel config
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: define bfin_memmap as static since it is only used here
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: cplb mananger: use a do...while loop rather than a for loop
use a do...while loop rather than a for loop to get slightly better
optimization and to avoid gcc "may be used uninitialized" warnings ...
we know that the [id]cplb_nr_bounds variables will never be 0, so this
is OK
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Bernd Schmidt [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: fix bug - traps test case 19 for exception 0x2d fails
Enable null pointer checking for ICPLBs. The code was there but for
some reason I had commented it out at some stage during development.
Should restrict this to 1K since atomic ops start there.
Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Graf Yang [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: add platform device bfin_mii-bus and KSZ8893M switch driver platform resources to board files
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: build jtag tty driver as a module by default
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Jie Zhang [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: fix 2 bugs related to debug
- unable to single step over emuexcpt instruction
- gdbproxy goes into infinite loop when doing gdb does "next" over
"emuexcpt"
Don't decrement PC after software breakpoint.
Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Bryan Wu [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Add ANOMALY_05000380 to BF54x to kill the compile warning
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Graf Yang [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Fix bug - 561 SMP kernel can't boot from jffs2
bss_l2 section is garbage when the data in this section is used by
_bfin_relocate_l1_mem, so move the zero out function ahead.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: base SIC_IWR# programming on whether the MMR exists
base SIC_IWR# programming on whether the MMR exists
rather than having to maintain another list of processors
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: read SYSCR on newer parts that mirror the bits of SWRST in it
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: fixup board init function name
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: drop CONFIG_I2C_BOARDINFO ifdefs
Drop CONFIG_I2C_BOARDINFO ifdefs as the common i2c header handles this
already by stubbing things out
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: bfin_reset->_bfin_reset redirection no longer needed
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: sync reboot handler with version in u-boot
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Michael Hennerich [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Faster Implementation of csum_tcpudp_nofold()
Avoid conditional branch instructions during carry bit additions.
Special thanks to Bernd.
Simplify: Use ((len + proto) << 8) like every other __LITTLE_ENDIAN__ machine
Cc: Bernd Schmidt <bernds_cb1@t-online.de>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Graf Yang [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Fix bug - BF518 port F, G, and H have different mux offset compare to BF527
[Mike Frysinger <vapier.adi@gmail.com>: keep the ifdef nest down]
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Grace Pan [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Add in cflag to support mlong-calls for kgdb_test
Signed-off-by: Grace Pan <grace.pan@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Sonic Zhang [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Fix bug - Run "reboot" hangs bf518-ezbrd
[Mike Frysinger <vapier.adi@gmail.com>:
- setup P_DEFAULT_BOOT_SPI_CS for every arch based on
the default bootrom behavior and convert all our boards
to it
- revert previous anomaly change ... bf51x is not affected
by anomaly
05000353]
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
MAINTIANERS: Blackfin: remove subscribers-only marking
remove subscribers-only marking as the list is
automatically & silently moderated for people
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Robin Getz [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Add ability to count and display number of NMI interrupts
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Robin Getz [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Add a few more instructions that can cause the trace buffer to be discontiguous
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Robin Getz [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Fix URL
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: cleanup bf54x ifdef mess in gpio code
merge more of the bf54x and !bf54x gpio code together to
cut down on #ifdef mess
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Jie Zhang [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Add one more check on `fp' to prevent double fault
Signed-off-by: Jie Zhang <jie.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Uwe Kleine-Koenig [Wed, 4 Feb 2009 09:02:30 +0000 (17:02 +0800)]
Blackfin arch: explicit add a might sleep to gpio_free
According to the documentation gpio_free should only be called from task
context only. To make this more explicit add a might sleep to all
implementations.
This patch changes the gpio_free implementations for the blackfin
architecture.
Signed-off-by: Uwe Kleine-Koenig <ukleinek@strlen.de>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Robin Getz [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: don't accidently re-enable interrupts
Make sure we don't accidently re-enable interrupts if we are being
called in atomic context
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Robin Getz [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Print out where the bootmode is coming from (for easier debugging).
Signed-off-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Michael Hennerich [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: reset POLAR setting when acquiring a gpio for the first time
when requesting a GPIO for the first time, the POLAR setting is not
set to a sane state. this can lead to indeterminate behavior that
cannot be resolved without an explicit write to the Blackfin port POLAR
register.
when requesting a GPIO for the first time via gpio_request(), the POLAR
setting for the GPIO in question should be set to sane state. this
should occur if the GPIO has not been allocated in any other way.
some examples:
- when doing something like "request_irq(); gpio_request();" on the
same GPIO, the POLAR setting should not be reset.
- when doing "gpio_request(); gpio_request();" on the same GPIO, the
POLAR setting should be reset only the first time and not the second.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Michael Hennerich [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Fix Bug - request lines with peripheral_request_list, but don't get freed with peripheral_free_list
Remove erroneous check_gpio(ident) in peripheral_free()
Reported-by: Michael McTernan <mmcternan@airvana.com>
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Michael Hennerich [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: Fix Bug - Kernel does not boot if re-program clocks
On BF561 EBIU_SDGCTL bit 31 controls the SDRAM external data
path width, typically set 0 for a 32-bit bus width. On other
Blackfin derivatives this bit should be set by default.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: fix bug - Dmacopy failed in BF537-STAMP
Dmacopy failed in BF537-STAMP when copy from SRAM to SDRAM and kernel
will reboot automatically.
Fixing by doing a SSYNC before mucking with DMA registers
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Sonic Zhang [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: enable bfin_eth in bf51x by default
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: line up machine-/cpu- vars after BF54xM addition
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: add support for mobile ddr bf54x parts
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Mike Frysinger [Wed, 4 Feb 2009 08:49:45 +0000 (16:49 +0800)]
Blackfin arch: scrub comments/whitespace/cvs keywords
Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Artem Bityutskiy [Mon, 2 Feb 2009 16:33:49 +0000 (18:33 +0200)]
write-back: fix nr_to_write counter
Commit
05fe478dd04e02fa230c305ab9b5616669821dd3 introduced some
@wbc->nr_to_write breakage.
It made the following changes:
1. Decrement wbc->nr_to_write instead of nr_to_write
2. Decrement wbc->nr_to_write _only_ if wbc->sync_mode == WB_SYNC_NONE
3. If synced nr_to_write pages, stop only if if wbc->sync_mode ==
WB_SYNC_NONE, otherwise keep going.
However, according to the commit message, the intention was to only make
change 3. Change 1 is a bug. Change 2 does not seem to be necessary,
and it breaks UBIFS expectations, so if needed, it should be done
separately later. And change 2 does not seem to be documented in the
commit message.
This patch does the following:
1. Undo changes 1 and 2
2. Add a comment explaining change 3 (it very useful to have comments
in _code_, not only in the commit).
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Acked-by: Nick Piggin <npiggin@suse.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Samuel Thibault [Tue, 3 Feb 2009 12:12:58 +0000 (13:12 +0100)]
Fix my email address in qd65xx.[ch]/pata_qdi.c
The @fnac.net will be shut down within a couple of months, so fix my
email address.
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Wed, 4 Feb 2009 00:52:44 +0000 (16:52 -0800)]
Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6
* 'linux-next' of git://git.infradead.org/ubifs-2.6:
UBIFS: remove fast unmounting
UBIFS: return sensible error codes
UBIFS: remount ro fixes
UBIFS: spelling fix 'date' -> 'data'
UBIFS: sync wbufs after syncing inodes and pages
UBIFS: fix LPT out-of-space bug (again)
UBIFS: fix no_chk_data_crc
UBIFS: fix assertions
UBIFS: ensure orphan area head is initialized
UBIFS: always clean up GC LEB space
UBIFS: add re-mount debugging checks
UBIFS: fix LEB list freeing
UBIFS: simplify locking
UBIFS: document dark_wm and dead_wm better
UBIFS: do not treat all data as short term
UBIFS: constify operations
UBIFS: do not commit twice
Linus Torvalds [Wed, 4 Feb 2009 00:52:10 +0000 (16:52 -0800)]
Merge master.kernel.org:/home/rmk/linux-2.6-arm
* master.kernel.org:/home/rmk/linux-2.6-arm:
NVRAM depends on RTC_DRV_CMOS
rename platform_driver name "flash" to "sa1100-mtd"
annotate that [fp, #-4] is the saved lr
Use __SPIN_LOCK_UNLOCKED to initialize bad_irq_desc.lock
ARM: OMAP: fix fault in enter_full_retention()
ARM: OMAP: Mask interrupts when disabling interrupts, v2
ARM: OMAP: gptimer min_delta_ns corrected
ARM: OMAP: Fix hsmmc init, v2
ARM: OMAP: Fix omap34xx revision detection for ES3.1
ARM: OMAP: DMA: Fix uninitialized channel flags
ARM: OMAP: Fix race in OMAP2/3 DMA IRQ handling
ARM: OMAP: Fix McBSP spin_lock deadlock
[ARM] 5366/1: fix shared memory coherency with VIVT L1 + L2 caches
[ARM] call undefined instruction exception handler with irqs enabled
[ARM] msm: fix build errors
[ARM] etherh: continue fixing build failure
Linus Torvalds [Wed, 4 Feb 2009 00:50:20 +0000 (16:50 -0800)]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/mfasheh/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2:
ocfs2: add quota call to ocfs2_remove_btree_range()
ocfs2: Wakeup the downconvert thread after a successful cancel convert
ocfs2: Access the xattr bucket only before modifying it.
configfs: Silence lockdep on mkdir(), rmdir() and configfs_depend_item()
ocfs2: Fix possible deadlock in ocfs2_write_dquot()
ocfs2: Push out dropping of dentry lock to ocfs2_wq
Linus Torvalds [Wed, 4 Feb 2009 00:49:54 +0000 (16:49 -0800)]
Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfs
* 'for-linus' of git://oss.sgi.com/xfs/xfs:
[XFS] Warn on transaction in flight on read-only remount
xfs: Check buffer lengths in log recovery
don't reallocate sxp variable passed into xfs_swapext
David S. Miller [Wed, 4 Feb 2009 00:28:23 +0000 (16:28 -0800)]
sparc64: Kill bogus TPC/address truncation during 32-bit faults.
This builds upon
eeabac7386ca13bfe1a58afeb04326a9e1a3a20e
("sparc64: Validate kernel generated fault addresses on sparc64.")
Upon further consideration, we actually should never see any
fault addresses for 32-bit tasks with the upper 32-bits set.
If it does every happen, by definition it's a bug. Whatever
context created that fault would only have that fault satisfied
if we used the full 64-bit address. If we truncate it, we'll
always fault the wrong address and we'll always loop faulting
forever.
So catch such conditions and mark them as errors always. Log
the error and fail the fault.
Signed-off-by: David S. Miller <davem@davemloft.net>
Randy Dunlap [Tue, 3 Feb 2009 23:20:13 +0000 (15:20 -0800)]
sunrpc: fix rdma dependencies
Fix sunrpc/rdma build dependencies.
Survives 12 build combinations of INET, IPV6, SUNRPC,
INFINIBAND, and INFINIBAND_ADDR_TRANS.
ERROR: "rdma_destroy_id" [net/sunrpc/xprtrdma/xprtrdma.ko] undefined!
ERROR: "rdma_connect" [net/sunrpc/xprtrdma/xprtrdma.ko] undefined!
ERROR: "rdma_destroy_qp" [net/sunrpc/xprtrdma/xprtrdma.ko] undefined!
ERROR: "rdma_create_id" [net/sunrpc/xprtrdma/xprtrdma.ko] undefined!
ERROR: "rdma_create_qp" [net/sunrpc/xprtrdma/xprtrdma.ko] undefined!
ERROR: "rdma_resolve_route" [net/sunrpc/xprtrdma/xprtrdma.ko] undefined!
ERROR: "rdma_disconnect" [net/sunrpc/xprtrdma/xprtrdma.ko] undefined!
ERROR: "rdma_resolve_addr" [net/sunrpc/xprtrdma/xprtrdma.ko] undefined!
ERROR: "rdma_accept" [net/sunrpc/xprtrdma/svcrdma.ko] undefined!
ERROR: "rdma_destroy_id" [net/sunrpc/xprtrdma/svcrdma.ko] undefined!
ERROR: "rdma_listen" [net/sunrpc/xprtrdma/svcrdma.ko] undefined!
ERROR: "rdma_create_id" [net/sunrpc/xprtrdma/svcrdma.ko] undefined!
ERROR: "rdma_create_qp" [net/sunrpc/xprtrdma/svcrdma.ko] undefined!
ERROR: "rdma_bind_addr" [net/sunrpc/xprtrdma/svcrdma.ko] undefined!
ERROR: "rdma_disconnect" [net/sunrpc/xprtrdma/svcrdma.ko] undefined!
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Karsten Keil [Tue, 3 Feb 2009 23:18:01 +0000 (15:18 -0800)]
e1000: Fix PCI enable to honor the need_ioport flag
On machine were no IO ports are assigned the call
to pci_enable_device() will fail, even if need_ioport
is false, we need to use pci_enable_device_mem() here.
Signed-off-by: Karsten Keil <kkeil@suse.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Dean Nelson [Tue, 3 Feb 2009 23:16:17 +0000 (15:16 -0800)]
sgi-xp: link XPNET's net_device_ops to its net_device structure
A recent patch by Stephen Hemminger to convert XPNET to use net_device_ops and
internal net_device_stats failed to link the net_device_ops structure to the
net_device structure. See commit
e8ac9c55f28482f5b2f497a8e7eb90985db237c2
("xpnet: convert devices to new API").
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cord Walter [Tue, 3 Feb 2009 23:14:05 +0000 (15:14 -0800)]
pcnet_cs: Fix misuse of the equality operator.
Signed-off-by: Cord Walter <qord@cwalter.net>
Signed-off-by: Komuro <komurojun-mbn@nifty.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Filip Aben [Tue, 3 Feb 2009 23:13:26 +0000 (15:13 -0800)]
hso: add new device id's
This patch adds a few device ID's. It also removes an ID that was used
in an internal engineering version of a device and will never see
commercial light. Even if this ID will be 'recycled' in the future,
which is very unlikely, we don't know what kind of device will be
behind it. Therefore it's safer to remove it.
Signed-off-by: Filip Aben <f.aben@option.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Oleg Nesterov [Tue, 3 Feb 2009 19:39:04 +0000 (20:39 +0100)]
ftrace: do_each_pid_task() needs rcu lock
"ftrace: use struct pid" commit
978f3a45d9499c7a447ca7615455cefb63d44165
converted ftrace_pid_trace to "struct pid*".
But we can't use do_each_pid_task() without rcu_read_lock() even if
we know the pid itself can't go away (it was pinned in ftrace_pid_write).
The exiting task can detach itself from this pid at any moment.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Felix Blyakher [Fri, 23 Jan 2009 03:34:05 +0000 (21:34 -0600)]
[XFS] Warn on transaction in flight on read-only remount
Till VFS can correctly support read-only remount without racing,
use WARN_ON instead of BUG_ON on detecting transaction in flight
after quiescing filesystem.
Signed-off-by: Felix Blyakher <felixb@sgi.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Dave Chinner [Thu, 22 Jan 2009 04:37:47 +0000 (15:37 +1100)]
xfs: Check buffer lengths in log recovery
Before trying to obtain, read or write a buffer,
check that the buffer length is actually valid. If
it is not valid, then something read in the recovery
process has been corrupted and we should abort
recovery.
Reported-by: Eric Sesterhenn <snakebyte@gmx.de>
Tested-by: Eric Sesterhenn <snakebyte@gmx.de>
Reviewed-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Felix Blyakher <felixb@sgi.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Felix Blyakher <felixb@sgi.com>
Felix Blyakher [Tue, 3 Feb 2009 16:38:41 +0000 (10:38 -0600)]
Merge branch 'master' of git://git./linux/kernel/git/torvalds/linux-2.6 into for-linus
Linus Torvalds [Tue, 3 Feb 2009 15:39:55 +0000 (07:39 -0800)]
Merge branch 'upstream-linus' of git://git./linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
libata: implement HORKAGE_1_5_GBPS and apply it to WD My Book
libata: add no penalty retry request for EH device handling routines
libata: improve probe failure handling
libata: add @spd_limit to sata_down_spd_limit()
libata: clear dev->ering in smarter way
libata: check onlineness before using SPD in sata_down_spd_limit()
libata: move ata_dev_disable() to libata-eh.c
libata: fix EH device failure handling
sata_nv: ck804 has borked hardreset too
ide/libata: fix ata_id_is_cfa() (take 4)
libata: fix kernel-doc warnings
ahci: add a module parameter to ignore the SSS flags for async scanning
sata_mv: Fix chip type for Hightpoint RocketRaid 1740/1742
[libata] sata_sil: Fix compilation error with libata debugging enabled
Arnaldo Carvalho de Melo [Tue, 3 Feb 2009 13:58:29 +0000 (11:58 -0200)]
blktrace: fix coding style in recent patches
Impact: cleanup
Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Arnaldo Carvalho de Melo [Mon, 2 Feb 2009 22:30:40 +0000 (20:30 -0200)]
blkftrace: binary tracing, synthesizing old format
Impact: new feature
With this and a blkrawverify modified not to verify the sequence numbers
we can start using the userspace tools to verify that the data produced
with the ftrace plugin works as expected.
Example:
[root@f10-1 ~]# echo 1 > /sys/block/sda/sda1/trace/enable
[root@f10-1 ~]# echo bin > /d/tracing/trace_options
[root@f10-1 ~]# echo blk > /d/tracing/current_tracer
[root@f10-1 ~]# cat /d/tracing/trace_pipe > sda1.blktrace.0
^C
[root@f10-1 ~]# ./blkrawverify --noseq sda1
Verifying sda1
CPU 0
Wrote output to sda1.verify.out
[root@f10-1 ~]# cat sda1.verify.out
---------------
Verifying sda1
---------------------
Summary for cpu 0:
1349 valid + 0 invalid (100.0%) processed
[root@f10-1 ~]#
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Arnaldo Carvalho de Melo [Mon, 2 Feb 2009 22:30:12 +0000 (20:30 -0200)]
trace: Change struct trace_event callbacks parameter list
Impact: API change
The trace_seq and trace_entry are in trace_iterator, where there are
more fields that may be needed by tracers, so just pass the
tracer_iterator as is already the case for struct tracer->print_line.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Frederic Weisbecker [Mon, 2 Feb 2009 22:29:21 +0000 (20:29 -0200)]
trace: better manage the context info for events
Impact: make trace_event more convenient for tracers
All tracers (for the moment) that use the struct trace_event want to
have the context info printed before their own output: the pid/cmdline,
cpu, and timestamp.
But some other tracers that want to implement their trace_event
callbacks will not necessary need these information or they may want to
format them as they want.
This patch adds a new default-enabled trace option:
TRACE_ITER_CONTEXT_INFO When disabled through:
echo nocontext-info > /debugfs/tracing/trace_options
The pid, cpu and timestamps headers will not be printed.
IE with the sched_switch tracer with context-info (default):
bash-2935 [001] 100.356561: 2935:120:S ==> [001] 0:140:R <idle>
<idle>-0 [000] 100.412804: 0:140:R + [000] 11:115:S events/0
<idle>-0 [000] 100.412816: 0:140:R ==> [000] 11:115:R events/0
events/0-11 [000] 100.412829: 11:115:S ==> [000] 0:140:R <idle>
Without context-info:
2935:120:S ==> [001] 0:140:R <idle>
0:140:R + [000] 11:115:S events/0
0:140:R ==> [000] 11:115:R events/0
11:115:S ==> [000] 0:140:R <idle>
A tracer can disable it at runtime by clearing the bit
TRACE_ITER_CONTEXT_INFO in trace_flags.
The print routines were renamed to trace_print_context and
trace_print_lat_context, so that they can be used by tracers if they
want to use them for one of the trace_event callbacks.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
David S. Miller [Tue, 3 Feb 2009 07:55:27 +0000 (23:55 -0800)]
Merge branch 'master' of /linux/kernel/git/torvalds/linux-2.6
Maciej Sosnowski [Tue, 3 Feb 2009 07:26:57 +0000 (23:26 -0800)]
dca: redesign locks to fix deadlocks
Change spin_locks to irqsave to prevent dead-locks.
Protect adding and deleting to/from dca_providers list.
Drop the lock during dca_sysfs_add_req() and dca_sysfs_remove_req() calls
as they might sleep (use GFP_KERNEL allocation).
Signed-off-by: Maciej Sosnowski <maciej.sosnowski@intel.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Roel Kluin [Tue, 3 Feb 2009 07:19:50 +0000 (23:19 -0800)]
cassini/sungem: limit reaches -1, but 0 tested
while (limit--)
if (test())
break;
if (limit <= 0)
goto test_failed;
In the last iteration, limit is decremented after the test to 0.
If just thereafter test() succeeds and a break occurs, the goto
still occurs because limit is 0.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stephen Rothwell [Tue, 3 Feb 2009 06:14:28 +0000 (22:14 -0800)]
sparc: fixup for sparseirq changes
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 3 Feb 2009 06:08:15 +0000 (22:08 -0800)]
sparc64: Validate kernel generated fault addresses on sparc64.
In order to handle all of the cases of address calculation overflow
properly, we run sparc 32-bit processes in "address masking" mode
when running on a 64-bit kernel.
Address masking mode zeros out the top 32-bits of the address
calculated for every load and store instruction.
However, when we're in privileged mode we have to run with that
address masking mode disabled even when accessing userspace from
the kernel.
To "simulate" the address masking mode we clear the top-bits by
hand for 32-bit processes in the fault handler.
It is the responsibility of code in the compat layer to properly
zero extend addresses used to access userspace. If this isn't
followed properly we can get into a fault loop.
Say that the user address is 0xf0000000 but for whatever reason
the kernel code sign extends this to 64-bit, and then the kernel
tries to access the result.
In such a case we'll fault on address 0xfffffffff0000000 but the fault
handler will process that fault as if it were to address 0xf0000000.
We'll loop faulting forever because the fault never gets satisfied.
So add a check specifically for this case, when the kernel is faulting
on a user address access and the addresses don't match up.
This code path is sufficiently slow path, and this bug is sufficiently
painful to diagnose, that this kind of bug check is warranted.
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Tue, 3 Feb 2009 05:57:48 +0000 (21:57 -0800)]
sparc64: On non-Niagara, need to touch NMI watchdog in NOHZ mode.
When we're idling in NOHZ mode, timer interrupts are not running.
Evidence of processing timer interrupts is what the NMI watchdog
uses to determine if the CPU is stuck.
On Niagara, we'll yield the cpu. This will make the cpu, at
worst, hang out in the hypervisor until an interrupt arrives.
This will prevent the NMI watchdog timer from firing.
However on non-Niagara we just loop executing instructions
which will cause the NMI watchdog to keep firing. It won't
see timer interrupts happening so it will think the cpu is
stuck.
Fix this by touching the NMI watchdog in the cpu idle loop
on non-Niagara machines.
Signed-off-by: David S. Miller <davem@davemloft.net>
Roel Kluin [Tue, 3 Feb 2009 05:39:02 +0000 (21:39 -0800)]
net: variables reach -1, but 0 tested
while (timeout--) { ... }
timeout becomes -1 if the loop isn't ended otherwise, not 0.
Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Steven Rostedt [Tue, 3 Feb 2009 02:38:33 +0000 (21:38 -0500)]
trace: let boot trace be chosen by command line
Now that we have a working ftrace=<tracer> function, make the boot
tracer get activated by it. This way we can turn it on or off without
recompiling the kernel, as well as keeping the selftests on. The
selftests are disabled whenever a default tracer starts running.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Steven Rostedt [Tue, 3 Feb 2009 02:38:32 +0000 (21:38 -0500)]
trace: fix default boot up tracer
Peter Zijlstra started the functionality to start up a default
tracing at bootup. This patch finishes the work.
Now if you add 'ftrace=<tracer>' to the command line, when that tracer
is registered on bootup, that tracer is selected and starts tracing.
Note, all selftests for tracers that are registered after this tracer
is disabled. This prevents the selftests from disturbing the running
tracer, or the running tracer from disturbing the selftest.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Ingo Molnar [Tue, 3 Feb 2009 05:25:38 +0000 (06:25 +0100)]
Merge branches 'tracing/ftrace', 'tracing/kmemtrace' and 'linus' into tracing/core
Tejun Heo [Thu, 29 Jan 2009 11:31:36 +0000 (20:31 +0900)]
libata: implement HORKAGE_1_5_GBPS and apply it to WD My Book
3Gbps is often much more prone to transmission failures. It's usually
okay to let EH handle speed down after transmission failures but some
WD My Book drives completely shutdown after certain transmission
failures and after it only power cycling can revive them. Combined
with the fact that external drives often end up with cable assembly
which is longer than usual and more likely to have intervening gender,
this makes these drives very likely to shutdown under certain
configurations virtually rendering them unusable.
This patch implements HOARKGE_1_5_GBPS and applies it to WD My Book
such that 1.5Gbps is forced once the device is identified.
Please take a look at the following bz for related reports.
http://bugzilla.kernel.org/show_bug.cgi?id=9913
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Tejun Heo [Thu, 29 Jan 2009 11:31:35 +0000 (20:31 +0900)]
libata: add no penalty retry request for EH device handling routines
Let -EAGAIN from EH device handling routines trigger EH retry without
consuming its tries count. This will be used to implement link SPD
horkage which requires hardreset to adjust SPD without affecting other
EH decisions. As it bypasses the forward progress guarantee provided
by the tries count, the requester is responsible for ensuring forward
progress.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Tejun Heo [Thu, 29 Jan 2009 11:31:34 +0000 (20:31 +0900)]
libata: improve probe failure handling
When link is flaky at high speed, it isn't uncommon for a device to
repeatedly fail probing sequence early after successfully negotiating
high link speed. This often leads to consecutive hotplug events
without successful probing.
This patch improves libata EH such that it remembers probing trials
and if there have been more than two unsuccessful trials in the past
60 seconds, slows down link speed to 1.5Gbps.
As link speed negotiation is the duty of the PHY layer proper, the
goal of this fallback mechanism is to provide the last resort when
everything else fails, which unfortunately happens not too
infrequently, so no fancy 6->3->1.5 speeding down or highest
successful transmission speed seen kind of logics (yet).
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Tejun Heo [Thu, 29 Jan 2009 11:31:33 +0000 (20:31 +0900)]
libata: add @spd_limit to sata_down_spd_limit()
Add @spd_limit to sata_down_spd_limit() so that the caller can specify
the SPD limit it wants. This parameter doesn't get in the way even
when it's too low. The closest possible limit is applied.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Tejun Heo [Thu, 29 Jan 2009 11:31:32 +0000 (20:31 +0900)]
libata: clear dev->ering in smarter way
dev->ering used to be cleared together with the rest of ata_device in
ata_dev_init() which is called whenever a probing event occurs.
dev->ering is about to be used to track probing failures so it needs
to remain persistent over multiple porbing events. This patch
achieves this by doing the following.
* Instead of CLEAR_OFFSET, define CLEAR_BEGIN and CLEAR_END and only
clear between BEGIN and END. ering is moved after END. The split
of persistent area is to allow hotter items remain at the head.
* ering is explicitly cleared on ata_dev_disable() and when device
attach succeeds. So, ering is persistent throug a device's life
time (unless explicitly cleared of course) and also through periods
inbetween disablement of an attached device and successful detection
of the next one.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Tejun Heo [Thu, 29 Jan 2009 11:31:31 +0000 (20:31 +0900)]
libata: check onlineness before using SPD in sata_down_spd_limit()
sata_down_spd_limit() should check whether the link is online before
using the SPD value to determine how to limit the link speed. Factor
out onlineness test and test it from sata_down_spd_limit().
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Tejun Heo [Thu, 29 Jan 2009 11:31:30 +0000 (20:31 +0900)]
libata: move ata_dev_disable() to libata-eh.c
ata_dev_disable() is about to be more tightly integrated into EH
logic. Move it to libata-eh.c.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Tejun Heo [Thu, 29 Jan 2009 11:31:29 +0000 (20:31 +0900)]
libata: fix EH device failure handling
The dev->pio_mode > XFER_PIO_0 test is there to avoid unnecessary
speed down warning messages but it accidentally disabled SATA link spd
down during configuration phase after reset where PIO mode is always
zero.
This patch fixes the problem by moving the test where it belongs.
This makes libata probing sequence behave better when the connection
is flaky at higher link speeds which isn't too uncommon for eSATA
devices.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Tejun Heo [Sun, 1 Feb 2009 01:56:31 +0000 (10:56 +0900)]
sata_nv: ck804 has borked hardreset too
While playing with nvraid, I found out that rmmoding and insmoding
often trigger hardreset failure on the first port (the second one was
always okay). Seriously, how diverse can you get with hardreset
behaviors? Anyways, make ck804 use noclassify variant too.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Sergei Shtylyov [Sun, 1 Feb 2009 16:46:39 +0000 (20:46 +0400)]
ide/libata: fix ata_id_is_cfa() (take 4)
When checking for the CFA feature set support, ata_id_is_cfa() tests bit 2 in
word 82 of the identify data instead the word 83; it also checks the ATA/PI
version support in the word 80 (which the CompactFlash specifications have as
reserved), this having no slightest chance to work on the modern CF cards that
don't have 0x848A in the word 0...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Randy Dunlap [Wed, 21 Jan 2009 00:28:59 +0000 (16:28 -0800)]
libata: fix kernel-doc warnings
Fix libata kernel-doc warnings:
Warning(linux-next-
20090120//drivers/ata/libata-core.c:4720): Excess function parameter 'dev' description in 'ata_qc_new'
Warning(linux-next-
20090120//drivers/ata/libata-scsi.c:428): No description found for parameter 'ap'
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Arjan van de Ven [Mon, 26 Jan 2009 10:05:44 +0000 (02:05 -0800)]
ahci: add a module parameter to ignore the SSS flags for async scanning
The SSS flag, which directs the OS to spin up one disk at a time
to not have the PSU blow out, sometimes gets set even when not needed.
The effect of this is a longer-than-needed boot time.
This patch adds a module parameter that makes the driver ignore SSS
at least as far as the parallel scan during boot is concerned...
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Mark Lord [Tue, 27 Jan 2009 21:33:13 +0000 (16:33 -0500)]
sata_mv: Fix chip type for Hightpoint RocketRaid 1740/1742
Fix chip type for the Highpoint RocketRAID 1740 and 1742 PCI cards.
These really do have Marvell 6042 chips on them, rather than the 5081 chip.
Confirmed by multiple (two) users (for the 1740), and by examining
the product photographs from Highpoint's web site.
Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Pasi Kärkkäinen [Mon, 2 Feb 2009 19:47:14 +0000 (21:47 +0200)]
[libata] sata_sil: Fix compilation error with libata debugging enabled
I tried compiling 2.6.29-rc1 and 2.6.29-rc3 with libata debugging enabled
and got the following error:
CC [M] drivers/ata/sata_sil.o
drivers/ata/sata_sil.c: In function 'sil_fill_sg':
drivers/ata/sata_sil.c:327: error: 'pi' undeclared (first use in this function)
drivers/ata/sata_sil.c:327: error: (Each undeclared identifier is reported only once
drivers/ata/sata_sil.c:327: error: for each function it appears in.)
make[2]: *** [drivers/ata/sata_sil.o] Error 1
make[1]: *** [drivers/ata] Error 2
make: *** [drivers] Error 2
include/linux/libata.h has the following enabled:
#define ATA_DEBUG
#define ATA_VERBOSE_DEBUG
#define ATA_IRQ_TRAP
This fixes the compilation.
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>