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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
dma-debug: Fix check_unmap null pointer dereference
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While it's debatable whether or not a NULL device argument to
the DMA API functions is valid... since it certainly isn't
valid on devices with an IOMMU... dma-debug really shouldn't be
dereferencing null pointers either.
Guard against that in err_printk and the driver_filter
functions. A Fedora rawhide user was seeing this in one of the
dvb drivers resulting in an oops on boot.
[ A patch has been sent for testing to the driver, but I feel
the dma debugging support should be fixed as well. (There's
still a pile of legacy garbage in the kernel passing null
pointers to dma_{alloc,free}_*. :( ]
Signed-off-by: Kyle McMartin <kyle@redhat.com>
Cc: mchehab@infradead.org
Cc: Joerg Roedel <joerg.roedel@amd.com>
LKML-Reference: <20090820011708.GP25206@bombadil.infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
clockevent: Prevent dead lock on clockevents_lock
timers: Drop write permission on /proc/timer_list
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Currently clockevents_notify() is called with interrupts enabled at
some places and interrupts disabled at some other places.
This results in a deadlock in this scenario.
cpu A holds clockevents_lock in clockevents_notify() with irqs enabled
cpu B waits for clockevents_lock in clockevents_notify() with irqs disabled
cpu C doing set_mtrr() which will try to rendezvous of all the cpus.
This will result in C and A come to the rendezvous point and waiting
for B. B is stuck forever waiting for the spinlock and thus not
reaching the rendezvous point.
Fix the clockevents code so that clockevents_lock is taken with
interrupts disabled and thus avoid the above deadlock.
Also call lapic_timer_propagate_broadcast() on the destination cpu so
that we avoid calling smp_call_function() in the clockevents notifier
chain.
This issue left us wondering if we need to change the MTRR rendezvous
logic to use stop machine logic (instead of smp_call_function) or add
a check in spinlock debug code to see if there are other spinlocks
which gets taken under both interrupts enabled/disabled conditions.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: "Pallipadi Venkatesh" <venkatesh.pallipadi@intel.com>
Cc: "Brown Len" <len.brown@intel.com>
LKML-Reference: <1250544899.2709.210.camel@sbs-t61.sc.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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/proc/timer_list and /proc/slabinfo are not supposed to be
written, so there should be no write permissions on it.
Signed-off-by: WANG Cong <amwang@redhat.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Vegard Nossum <vegard.nossum@gmail.com>
Cc: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Cc: linux-mm@kvack.org
Cc: Christoph Lameter <cl@linux-foundation.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Amerigo Wang <amwang@redhat.com>
Cc: Matt Mackall <mpm@selenic.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
LKML-Reference: <20090817094525.6355.88682.sendpatchset@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
tracing: Fix too large stack usage in do_one_initcall()
tracing: handle broken names in ftrace filter
ftrace: Unify effect of writing to trace_options and option/*
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One of my testboxes triggered this nasty stack overflow crash
during SCSI probing:
[ 5.874004] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 5.875004] device: 'sda': device_add
[ 5.878004] BUG: unable to handle kernel NULL pointer dereference at 00000a0c
[ 5.878004] IP: [<b1008321>] print_context_stack+0x81/0x110
[ 5.878004] *pde = 00000000
[ 5.878004] Thread overran stack, or stack corrupted
[ 5.878004] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[ 5.878004] last sysfs file:
[ 5.878004]
[ 5.878004] Pid: 1, comm: swapper Not tainted (2.6.31-rc6-tip-01272-g9919e28-dirty #5685)
[ 5.878004] EIP: 0060:[<b1008321>] EFLAGS: 00010083 CPU: 0
[ 5.878004] EIP is at print_context_stack+0x81/0x110
[ 5.878004] EAX: cf8a3000 EBX: cf8a3fe4 ECX: 00000049 EDX: 00000000
[ 5.878004] ESI: b1cfce84 EDI: 00000000 EBP: cf8a3018 ESP: cf8a2ff4
[ 5.878004] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 5.878004] Process swapper (pid: 1, ti=cf8a2000 task=cf8a8000 task.ti=cf8a3000)
[ 5.878004] Stack:
[ 5.878004] b1004867 fffff000 cf8a3ffc
[ 5.878004] Call Trace:
[ 5.878004] [<b1004867>] ? kernel_thread_helper+0x7/0x10
[ 5.878004] BUG: unable to handle kernel NULL pointer dereference at 00000a0c
[ 5.878004] IP: [<b1008321>] print_context_stack+0x81/0x110
[ 5.878004] *pde = 00000000
[ 5.878004] Thread overran stack, or stack corrupted
[ 5.878004] Oops: 0000 [#2] PREEMPT SMP DEBUG_PAGEALLOC
The oops did not reveal any more details about the real stack
that we have and the system got into an infinite loop of
recursive pagefaults.
So i booted with CONFIG_STACK_TRACER=y and the 'stacktrace' boot
parameter. The box did not crash (timings/conditions probably
changed a tiny bit to trigger the catastrophic crash), but the
/debug/tracing/stack_trace file was rather revealing:
Depth Size Location (72 entries)
----- ---- --------
0) 3704 52 __change_page_attr+0xb8/0x290
1) 3652 24 __change_page_attr_set_clr+0x43/0x90
2) 3628 60 kernel_map_pages+0x108/0x120
3) 3568 40 prep_new_page+0x7d/0x130
4) 3528 84 get_page_from_freelist+0x106/0x420
5) 3444 116 __alloc_pages_nodemask+0xd7/0x550
6) 3328 36 allocate_slab+0xb1/0x100
7) 3292 36 new_slab+0x1c/0x160
8) 3256 36 __slab_alloc+0x133/0x2b0
9) 3220 4 kmem_cache_alloc+0x1bb/0x1d0
10) 3216 108 create_object+0x28/0x250
11) 3108 40 kmemleak_alloc+0x81/0xc0
12) 3068 24 kmem_cache_alloc+0x162/0x1d0
13) 3044 52 scsi_pool_alloc_command+0x29/0x70
14) 2992 20 scsi_host_alloc_command+0x22/0x70
15) 2972 24 __scsi_get_command+0x1b/0x90
16) 2948 28 scsi_get_command+0x35/0x90
17) 2920 24 scsi_setup_blk_pc_cmnd+0xd4/0x100
18) 2896 128 sd_prep_fn+0x332/0xa70
19) 2768 36 blk_peek_request+0xe7/0x1d0
20) 2732 56 scsi_request_fn+0x54/0x520
21) 2676 12 __generic_unplug_device+0x2b/0x40
22) 2664 24 blk_execute_rq_nowait+0x59/0x80
23) 2640 172 blk_execute_rq+0x6b/0xb0
24) 2468 32 scsi_execute+0xe0/0x140
25) 2436 64 scsi_execute_req+0x152/0x160
26) 2372 60 scsi_vpd_inquiry+0x6c/0x90
27) 2312 44 scsi_get_vpd_page+0x112/0x160
28) 2268 52 sd_revalidate_disk+0x1df/0x320
29) 2216 92 rescan_partitions+0x98/0x330
30) 2124 52 __blkdev_get+0x309/0x350
31) 2072 8 blkdev_get+0xf/0x20
32) 2064 44 register_disk+0xff/0x120
33) 2020 36 add_disk+0x6e/0xb0
34) 1984 44 sd_probe_async+0xfb/0x1d0
35) 1940 44 __async_schedule+0xf4/0x1b0
36) 1896 8 async_schedule+0x12/0x20
37) 1888 60 sd_probe+0x305/0x360
38) 1828 44 really_probe+0x63/0x170
39) 1784 36 driver_probe_device+0x5d/0x60
40) 1748 16 __device_attach+0x49/0x50
41) 1732 32 bus_for_each_drv+0x5b/0x80
42) 1700 24 device_attach+0x6b/0x70
43) 1676 16 bus_attach_device+0x47/0x60
44) 1660 76 device_add+0x33d/0x400
45) 1584 52 scsi_sysfs_add_sdev+0x6a/0x2c0
46) 1532 108 scsi_add_lun+0x44b/0x460
47) 1424 116 scsi_probe_and_add_lun+0x182/0x4e0
48) 1308 36 __scsi_add_device+0xd9/0xe0
49) 1272 44 ata_scsi_scan_host+0x10b/0x190
50) 1228 24 async_port_probe+0x96/0xd0
51) 1204 44 __async_schedule+0xf4/0x1b0
52) 1160 8 async_schedule+0x12/0x20
53) 1152 48 ata_host_register+0x171/0x1d0
54) 1104 60 ata_pci_sff_activate_host+0xf3/0x230
55) 1044 44 ata_pci_sff_init_one+0xea/0x100
56) 1000 48 amd_init_one+0xb2/0x190
57) 952 8 local_pci_probe+0x13/0x20
58) 944 32 pci_device_probe+0x68/0x90
59) 912 44 really_probe+0x63/0x170
60) 868 36 driver_probe_device+0x5d/0x60
61) 832 20 __driver_attach+0x89/0xa0
62) 812 32 bus_for_each_dev+0x5b/0x80
63) 780 12 driver_attach+0x1e/0x20
64) 768 72 bus_add_driver+0x14b/0x2d0
65) 696 36 driver_register+0x6e/0x150
66) 660 20 __pci_register_driver+0x53/0xc0
67) 640 8 amd_init+0x14/0x16
68) 632 572 do_one_initcall+0x2b/0x1d0
69) 60 12 do_basic_setup+0x56/0x6a
70) 48 20 kernel_init+0x84/0xce
71) 28 28 kernel_thread_helper+0x7/0x10
There's a lot of fat functions on that stack trace, but
the largest of all is do_one_initcall(). This is due to
the boot trace entry variables being on the stack.
Fixing this is relatively easy, initcalls are fundamentally
serialized, so we can move the local variables to file scope.
Note that this large stack footprint was present for a
couple of months already - what pushed my system over
the edge was the addition of kmemleak to the call-chain:
6) 3328 36 allocate_slab+0xb1/0x100
7) 3292 36 new_slab+0x1c/0x160
8) 3256 36 __slab_alloc+0x133/0x2b0
9) 3220 4 kmem_cache_alloc+0x1bb/0x1d0
10) 3216 108 create_object+0x28/0x250
11) 3108 40 kmemleak_alloc+0x81/0xc0
12) 3068 24 kmem_cache_alloc+0x162/0x1d0
13) 3044 52 scsi_pool_alloc_command+0x29/0x70
This pushes the total to ~3800 bytes, only a tiny bit
more was needed to corrupt the on-kernel-stack thread_info.
The fix reduces the stack footprint from 572 bytes
to 28 bytes.
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@kernel.org>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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If one filter item (for set_ftrace_filter and set_ftrace_notrace) is being
setup by more than 1 consecutive writes (FTRACE_ITER_CONT flag), it won't
be handled corretly.
I used following program to test/verify:
[snip]
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
int main(int argc, char **argv)
{
int fd, i;
char *file = argv[1];
if (-1 == (fd = open(file, O_WRONLY))) {
perror("open failed");
return -1;
}
for(i = 0; i < (argc - 2); i++) {
int len = strlen(argv[2+i]);
int cnt, off = 0;
while(len) {
cnt = write(fd, argv[2+i] + off, len);
len -= cnt;
off += cnt;
}
}
close(fd);
return 0;
}
[snip]
before change:
sh-4.0# echo > ./set_ftrace_filter
sh-4.0# /test ./set_ftrace_filter "sys" "_open "
sh-4.0# cat ./set_ftrace_filter
#### all functions enabled ####
sh-4.0#
after change:
sh-4.0# echo > ./set_ftrace_notrace
sh-4.0# test ./set_ftrace_notrace "sys" "_open "
sh-4.0# cat ./set_ftrace_notrace
sys_open
sh-4.0#
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
LKML-Reference: <20090811152904.GA26065@jolsa.lab.eng.brq.redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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"echo noglobal-clock > trace_options" can be used to change trace
clock but "echo 0 > options/global-clock" can't. The flag toggling
will be silently accepted without actually changing the clock callback.
We can fix it by using set_tracer_flags() in
trace_options_core_write().
Changelog:
v1->v2: Simplified switch() after Li Zefan <lizf@cn.fujitsu.com>'s
suggestion
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Fix build with older binutils and consolidate linker script
x86: Fix an incorrect argument of reserve_bootmem()
x86: add vmlinux.lds to targets in arch/x86/boot/compressed/Makefile
xen: rearrange things to fix stackprotector
x86: make sure load_percpu_segment has no stackprotector
i386: Fix section mismatches for init code with !HOTPLUG_CPU
x86, pat: Allow ISA memory range uncacheable mapping requests
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binutils prior to 2.17 can't deal with the currently possible
situation of a new segment following the per-CPU segment, but
that new segment being empty - objcopy misplaces the .bss (and
perhaps also the .brk) sections outside of any segment.
However, the current ordering of sections really just appears
to be the effect of cumulative unrelated changes; re-ordering
things allows to easily guarantee that the segment following
the per-CPU one is non-empty, and at once eliminates the need
for the bogus data.init2 segment.
Once touching this code, also use the various data section
helper macros from include/asm-generic/vmlinux.lds.h.
-v2: fix !SMP builds.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: <sam@ravnborg.org>
LKML-Reference: <4A94085D02000078000119A5@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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This line looks suspicious, because if this is true, then the
'flags' parameter of function reserve_bootmem_generic() will be
unused when !CONFIG_NUMA. I don't think this is what we want.
Signed-off-by: WANG Cong <amwang@redhat.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: akpm@linux-foundation.org
LKML-Reference: <20090821083709.5098.52505.sendpatchset@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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The absence of vmlinux.lds here keeps .vmlinux.lds.cmd from being
included, which in turn leads to it and all its dependents always
getting rebuilt independent of whether they are already up-to-date.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
LKML-Reference: <4A8D84670200007800010D31@vpn.id2.novell.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen into x86/urgent
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Make sure the stack-protector segment registers are properly set up
before calling any functions which may have stack-protection compiled
into them.
[ Impact: prevent Xen early-boot crash when stack-protector is enabled ]
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
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load_percpu_segment() is used to set up the per-cpu segment registers,
which are also used for -fstack-protector. Make sure that the
load_percpu_segment() function doesn't have stackprotector enabled.
[ Impact: allow percpu setup before calling stack-protected functions ]
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
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Commit 0e83815be719d3391bf5ea24b7fe696c07dbd417 changed the
section the initial_code variable gets allocated in, in an
attempt to address a section conflict warning. This, however
created a new section conflict when building without
HOTPLUG_CPU. The apparently only (reasonable) way to address
this is to always use __REFDATA.
Once at it, also fix a second section mismatch when not using
HOTPLUG_CPU.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Cc: Robert Richter <robert.richter@amd.com>
LKML-Reference: <4A8AE7CD020000780001054B@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Max Vozeler reported:
> Bug 13877 - bogl-term broken with CONFIG_X86_PAT=y, works with =n
>
> strace of bogl-term:
> 814 mmap2(NULL, 65536, PROT_READ|PROT_WRITE, MAP_SHARED, 4, 0)
> = -1 EAGAIN (Resource temporarily unavailable)
> 814 write(2, "bogl: mmaping /dev/fb0: Resource temporarily unavailable\n",
> 57) = 57
PAT code maps the ISA memory range as WB in the PAT attribute, so that
fixed range MTRR registers define the actual memory type (UC/WC/WT etc).
But the upper level is_new_memtype_allowed() API checks are failing,
as the request here is for UC and the return tracked type is WB (Tracked type is
WB as MTRR type for this legacy range potentially will be different for each
4k page).
Fix is_new_memtype_allowed() by always succeeding the ISA address range
checks, as the null PAT (WB) and def MTRR fixed range register settings
satisfy the memory type needs of the applications that map the ISA address
range.
Reported-and-Tested-by: Max Vozeler <xam@debian.org>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs-2.6:
ext3: Improve error message that changing journaling mode on remount is not possible
ext3: Update Kconfig description of EXT3_DEFAULTS_TO_ORDERED
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possible
This patch makes the error message about changing journaling mode on remount
more descriptive. Some people are going to hit this error now due to commit
bbae8bcc49bc4d002221dab52c79a50a82e7cd1f if they configure a kernel to default
to data=writeback mode. The problem happens if they have data=ordered set for
the root filesystem in /etc/fstab but not in the kernel command line (and they
don't use initrd). Their filesystem then gets mounted as data=writeback by
kernel but then their boot fails because init scripts won't be able to remount
the filesystem rw. Better error message will hopefully make it easier for them
to find the error in their setup and bother us less with error reports :).
Signed-off-by: Jan Kara <jack@suse.cz>
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The old description for this configuration option was perhaps not
completely balanced in terms of describing the tradeoffs of using a
default of data=writeback vs. data=ordered. Despite the fact that old
description very strongly recomended disabling this feature, all of
the major distributions have elected to preserve the existing 'legacy'
default, which is a strong hint that it perhaps wasn't telling the
whole story.
This revised description has been vetted by a number of ext3
developers as being better at informing the user about the tradeoffs
of enabling or disabling this configuration feature.
Cc: linux-ext4@vger.kernel.org
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'fix/misc' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
sound: pcm_lib: fix unsorted list constraint handling
sound: vx222: fix input level control range check
ALSA: ali5451: fix timeout handling in snd_ali_{codecs,timer}_ready()
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snd_interval_list() expected a sorted list but did not document this, so
there are drivers that give it an unsorted list. To fix this, change
the algorithm to work with any list.
This fixes the "Slave PCM not usable" error with USB devices that have
multiple alternate settings with sample rates in decreasing order, such
as the Philips Askey VC010 WebCam.
http://bugzilla.kernel.org/show_bug.cgi?id=14028
Reported-and-tested-by: Andrzej <adkadk@gmail.com>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Fix a logic error in the range check of the input level control that
would prevent setting any volume less than the maximum.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Modify loops in such way that the register value is checked also after
the timeout condition, just in case the heavy interrupt load etc. caused
the thread to sleep for the time period exceeding the timeout value.
While at it remove an extra ALI_STIMER read from snd_ali_stimer_ready().
Reported-by: Jack Byer <ojbyer@usa.net>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
[WATCHDOG] ar7_wdt: fix path to ar7-specific headers
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AR7 is currently being resubmitted for mainline inclusion
and we changed the path to the ar7-specific headers
from ar7 to mach-ar7 to reflect the other MIPS-based
boards header hierarchy. This patch will avoid any future
compilation failure due to missing headers.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
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When I rewrote tty ldisc code to use proper reference counts (commits
65b770468e98 and cbe9352fa08f) in order to avoid a race with hangup, the
test-program that Eric Biederman used to trigger the original problem
seems to have exposed another long-standing bug: the hangup code did the
'tty_ldisc_halt()' to stop any buffer flushing activity, but unlike the
other call sites it never actually flushed any pending work.
As a result, if you get just the right timing, the pending work may be
just about to execute (ie the timer has already triggered and thus
cancel_delayed_work() was a no-op), when we then re-initialize the ldisc
from under it.
That, in turn, results in various random problems, usually seen as a
NULL pointer dereference in run_timer_softirq() or a BUG() in
worker_thread (but it can be almost anything).
Fix it by adding the required 'flush_scheduled_work()' after doing the
tty_ldisc_halt() (this also requires us to move the ldisc halt to before
taking the ldisc mutex in order to avoid a deadlock with the workqueue
executing do_tty_hangup, which requires the mutex).
The locking should be cleaned up one day (the requirement to do this
outside the ldisc_mutex is very annoying, and weakens the lock), but
that's a larger and separate undertaking.
Reported-by: Eric W. Biederman <ebiederm@xmission.com>
Tested-by: Xiaotian Feng <xtfeng@gmail.com>
Tested-by: Yanmin Zhang <yanmin_zhang@linux.intel.com>
Tested-by: Dave Young <hidave.darkstar@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit 76db6d9500caeaa774a3e32a997eba30bbdc176b (nfs41: add session setup
to the state manager) introduces an infinite loop possibility in the NFSv4
state manager. By first checking nfs4_has_session() before clearing the
NFS4CLNT_SESSION_SETUP flag, it allows for a situation where someone sets
that flag, but it never gets cleared, and so the state manager loops.
In fact commit c3fad1b1aaf850bf692642642ace7cd0d64af0a3 (nfs41: add session
reset to state manager) causes this to happen every time we get a network
partition error.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Tested-by: Daniel J Blueman <daniel.blueman@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2:
ocfs2/dlm: Wait on lockres instead of erroring cancel requests
ocfs2: Add missing lock name
ocfs2: Don't oops in ocfs2_kill_sb on a failed mount
ocfs2: release the buffer head in ocfs2_do_truncate.
ocfs2: Handle quota file corruption more gracefully
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In case a downconvert is queued, and a flock receives a signal,
BUG_ON(lockres->l_action != OCFS2_AST_INVALID) is triggered
because a lock cancel triggers a dlmunlock while an AST is
scheduled.
To avoid this, allow a LKM_CANCEL to pass through, and let it
wait on __dlm_wait_on_lockres().
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.de>
Acked-off-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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There is missing name for NFSSync cluster lock. This makes lockdep unhappy
because we end up passing NULL to lockdep when initializing lock key. Fix it.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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If we fail to mount the filesystem, we have to be careful not to dereference
uninitialized structures in ocfs2_kill_sb.
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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In ocfs2_do_truncate, we forget to release last_eb_bh which
will cause memleak. So call brelse in the end.
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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ocfs2_read_virt_blocks() does BUG when we try to read a block from a file
beyond its end. Since this can happen due to filesystem corruption, it
is not really an appropriate answer. Make ocfs2_read_quota_block() check
the condition and handle it by calling ocfs2_error() and returning EIO.
[ Modified to print ip_blkno in the error - Joel ]
Reported-by: Tristan Ye <tristan.ye@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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* 'fixes' of git://git.marvell.com/orion:
[ARM] Orion NAND: Make asm volatile avoid GCC pushing ldrd out of the loop
[ARM] Kirkwood: enable eSATA on QNAP TS-219P
[ARM] Kirkwood: __init requires linux/init.h
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GCC 4.3.3 and 4.4.1 happily moves the dword load instruction out of the
loop in orion_nand_read_buf. This patch makes the instruction volatile
to avoid the issue. I've discussed this at gcc-help, refer to the thread
at
http://gcc.gnu.org/ml/gcc-help/2009-08/msg00187.html
The early clobber is added to avoid the destination registers and the
source register overlapping.
Signed-off-by: Simon Kagstrom <simon.kagstrom@netinsight.net>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
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Initialize PCI/PCIe on the QNAP TS-119, TS-219 and TS-219P hardware
allowing the use of the discrete eSATA controller connected to the PCIe
bus in the TS-219P.
Signed-off-by: John Holland <john.holland@cellent-fs.de>
Tested-by: Thomas Reitmayr <treitmayr@devbase.at>
Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
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Include linux/init.h for __init to fix this error:
CC [M] drivers/net/wireless/wl12xx/boot.o
In file included from arch/arm/mach-kirkwood/include/mach/gpio.h:13,
from arch/arm/include/asm/gpio.h:5,
from include/linux/gpio.h:7,
from drivers/net/wireless/wl12xx/boot.c:24:
arch/arm/plat-orion/include/plat/gpio.h:32: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘orion_gpio_init’
make[6]: *** [drivers/net/wireless/wl12xx/boot.o] Error 1
make[5]: *** [drivers/net/wireless/wl12xx] Error 2
Signed-off-by: Martin Michlmayr <tbm@cyrius.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
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2.6.30's commit 8a0bdec194c21c8fdef840989d0d7b742bb5d4bc removed
user_shm_lock() calls in hugetlb_file_setup() but left the
user_shm_unlock call in shm_destroy().
In detail:
Assume that can_do_hugetlb_shm() returns true and hence user_shm_lock()
is not called in hugetlb_file_setup(). However, user_shm_unlock() is
called in any case in shm_destroy() and in the following
atomic_dec_and_lock(&up->__count) in free_uid() is executed and if
up->__count gets zero, also cleanup_user_struct() is scheduled.
Note that sched_destroy_user() is empty if CONFIG_USER_SCHED is not set.
However, the ref counter up->__count gets unexpectedly non-positive and
the corresponding structs are freed even though there are live
references to them, resulting in a kernel oops after a lots of
shmget(SHM_HUGETLB)/shmctl(IPC_RMID) cycles and CONFIG_USER_SCHED set.
Hugh changed Stefan's suggested patch: can_do_hugetlb_shm() at the
time of shm_destroy() may give a different answer from at the time
of hugetlb_file_setup(). And fixed newseg()'s no_id error path,
which has missed user_shm_unlock() ever since it came in 2.6.9.
Reported-by: Stefan Huber <shuber2@gmail.com>
Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Tested-by: Stefan Huber <shuber2@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/radeon/kms: Fix radeon_gem_busy_ioctl harder.
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It was mixing up TTM placement values and flags.
Signed-off-by: Michel Dänzer <daenzer@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6:
favr32: improve touchscreen response
avr32/lib: fix unaligned memcpy where len < 4
avr32/lib: fix unaligned memcpy()
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The ezLCD+101 board (to which an favr-32 is fitted) has a long,
unshielded, nasty lead between the touch panel and the ads7843 touch
controller. In order to get satisfactory response then, we need to
employ every noise-reduction trick in the driver's arsenal. After
extensive fiddling I've found some good settings:
1) We keep vref on all the time to dramatically reduce settling times
(at the cost of a tiny increase in power consumption).
2) Despite 1 the settling time is still non-zero. 500uS is plenty of
time for the signals to settle
3) Despite 1 and 2 there's still a little bit of noise around. By
setting a pen recheck delay we make the panel feel less touchy and
twitchy.
Someone with more time and patience myself might be able to tune this
numbers further but these settings are now perfectly acceptable for
normal use.
Tested on ezLCD+101 though should only improve response on other ezLCD+/
favr-32 boards too.
Signed-off-by: Ben Nizette <bn@niasdigital.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
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in case of memcpy(p, unaligned, 1..3) we get 1..3 as the
return value instead of p
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
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memcpy(p, unaligned, 4..) returns (p + num_of_unaligned_by_copied)
instead of p because p is not preserved in the unaligned case.
Noticed by Herbert Xu's superior parameter recycling coding technique
which let the md4 self-test fail on avr32.
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: ucb1400_ts - enable interrupt unconditionally
Input: ucb1400_ts - enable ADC Filter
Input: wacom - don't use on-stack memory for report buffers
Input: iforce - support new revision of ACT LABS Force RS
Input: joydev - decouple axis and button map ioctls from input constants
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Sometimes, when using the touchscreen, it stops working till next restart
and the following message is printed:
ucb1400: unexpected IE_STATUS = 0x0
The following patch retriggers the touchscreen interrupt unconditionally.
This prevents hanging of the touchscreen in case of bogus interrupt
occurence.
Signed-off-by: Pavel Revak <palo@bielyvlk.sk>
Acked-by: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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This patch enables ADC filtering on UCB1400 codec by default. The
benefit from this change is mostly on some Colibri boards where
the ADCSYNC pin of the UCB1400 codec isn't connected causing the
touchscreen to jitter very badly. This change has no visible
effect on boards where the ADCSYNC pin is connected.
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Tested-by: Palo Revak <palo@bielyvlk.sk>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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Tested-by: Martin Capitanio <martin@capitanio.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
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