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With the configuration: CONFIG_DEBUG_PAGEALLOC=y and Shaohua's patch:
[PATCH]x86: make spurious_fault check correct pte bit
Function call graph trace with the following will trigger a page fault.
# cd /sys/kernel/debug/tracing/
# echo function_graph > current_tracer
# cat per_cpu/cpu1/trace_pipe_raw > /dev/null
BUG: unable to handle kernel paging request at ffff880006e99000
IP: [<ffffffff81085572>] rb_event_length+0x1/0x3f
PGD 1b19063 PUD 1b1d063 PMD 3f067 PTE 6e99160
Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
last sysfs file: /sys/devices/virtual/net/lo/operstate
CPU 1
Modules linked in:
Pid: 1982, comm: cat Not tainted 2.6.35-rc6-aes+ #300 /Bochs
RIP: 0010:[<ffffffff81085572>] [<ffffffff81085572>] rb_event_length+0x1/0x3f
RSP: 0018:ffff880006475e38 EFLAGS: 00010006
RAX: 0000000000000ff0 RBX: ffff88000786c630 RCX: 000000000000001d
RDX: ffff880006e98000 RSI: 0000000000000ff0 RDI: ffff880006e99000
RBP: ffff880006475eb8 R08: 000000145d7008bd R09: 0000000000000000
R10: 0000000000008000 R11: ffffffff815d9336 R12: ffff880006d08000
R13: ffff880006e605d8 R14: 0000000000000000 R15: 0000000000000018
FS: 00007f2b83e456f0(0000) GS:ffff880002100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: ffff880006e99000 CR3: 00000000064a8000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process cat (pid: 1982, threadinfo ffff880006474000, task ffff880006e40770)
Stack:
ffff880006475eb8 ffffffff8108730f 0000000000000ff0 000000145d7008bd
<0> ffff880006e98010 ffff880006d08010 0000000000000296 ffff88000786c640
<0> ffffffff81002956 0000000000000000 ffff8800071f4680 ffff8800071f4680
Call Trace:
[<ffffffff8108730f>] ? ring_buffer_read_page+0x15a/0x24a
[<ffffffff81002956>] ? return_to_handler+0x15/0x2f
[<ffffffff8108a575>] tracing_buffers_read+0xb9/0x164
[<ffffffff810debfe>] vfs_read+0xaf/0x150
[<ffffffff81002941>] return_to_handler+0x0/0x2f
[<ffffffff810248b0>] __bad_area_nosemaphore+0x17e/0x1a1
[<ffffffff81002941>] return_to_handler+0x0/0x2f
[<ffffffff810248e6>] bad_area_nosemaphore+0x13/0x15
Code: 80 25 b2 16 b3 00 fe c9 c3 55 48 89 e5 f0 80 0d a4 16 b3 00 02 c9 c3 55 31 c0 48 89 e5 48 83 3d 94 16 b3 00 01 c9 0f 94 c0 c3 55 <8a> 0f 48 89 e5 83 e1 1f b8 08 00 00 00 0f b6 d1 83 fa 1e 74 27
RIP [<ffffffff81085572>] rb_event_length+0x1/0x3f
RSP <ffff880006475e38>
CR2: ffff880006e99000
---[ end trace a6877bb92ccb36bb ]---
The root cause is that ring_buffer_read_page() may read out of page
boundary, because the boundary checking is done after reading. This is
fixed via doing boundary checking before reading.
Reported-by: Shaohua Li <shaohua.li@intel.com>
Cc: <stable@kernel.org>
Signed-off-by: Huang Ying <ying.huang@intel.com>
LKML-Reference: <1280297641.2771.307.camel@yhuang-dev>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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With CONFIG_DEBUG_PAGEALLOC, I observed an unallocated memory access in
function_graph trace. It appears we find a small size entry in ring buffer,
but we access it as a big size entry. The access overflows the page size
and touches an unallocated page.
Cc: <stable@kernel.org>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
LKML-Reference: <1280217994.32400.76.camel@sli10-desk.sh.intel.com>
[ Added a comment to explain the problem - SDR ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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available
make version 3.80 doesn't support "else ifdef" on the same line, also it
doesn't support unindented nested constructs.
Build fails with:
Makefile:608: Extraneous text after `else' directive
Makefile:611: *** only one `else' per conditional. Stop.
This patch fixes the build for make 3.80.
Cc: Ingo Molnar <mingo@elte.hu>,
Cc: Borislav Petkov <borislav.petkov@amd.com>
LKML-Reference: <1278430783-17259-1-git-send-email-conny.seidel@amd.com>
Signed-off-by: Conny Seidel <conny.seidel@amd.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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When parsing the objdump disassembly output we can have goto labels that
are valid hex numbers and thus get confused with lines with machine
code.
Handle the common case of a label that has nothing after it and other
cases where there is just source code by validating the resulting "ip".
It is still possible that we find goto labels that are in the function
address range, but only if they are located before the real address we
should be OK.
A change in the objdump output to have a clear marker separating
addresses from the disassembly would come handy, but we would still have
to deal with older versions.
Reported-by: Gleb Natapov <gleb@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <20100722170541.GF17631@ghostprotocols.net>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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We define a number of symbols in the linker scipt like this:
__start_syscalls_metadata = .;
*(__syscalls_metadata)
But we do not know the alignment of "." when we assign
the __start_syscalls_metadata symbol.
gcc started to uses bigger alignment for structs (32 bytes),
so we saw situations where the linker due to alignment
constraints increased the value of "." after the symbol assignment.
This resulted in boot fails.
Fix this by forcing a 32 byte alignment of "." before the
assignment.
This patch introduces the forced alignment for
ftrace_events and syscalls_metadata.
It may be required in more places.
Reported-by: Zeev Tarantov <zeev.tarantov@gmail.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
LKML-Reference: <20100710063459.GA14596@merkur.ravnborg.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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When I ran "perf kvm ... top", I encountered the following error output.
Error: perfcounter syscall returned with -1 (Too many open files)
Fatal: No CONFIG_PERF_EVENTS=y kernel support configured?
Looking into perf, I found perf opens too many directories at
initialization time, but forgets to close them. Here is the fix.
LKML-Reference: <4C230362.5080704@cn.fujitsu.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Hists that have been filtered, because they don't have callchains
matching the parent filter, won't be printed. As such,
hist_entry__snprintf() returns 0 for them, but we don't control
this value and we always print the buffer, which might be
untouched and then only made of random stack garbage.
Not only does it paint the screen with barf, it also prints
the callchains for these hists, even though they have been filtered,
since the hist has been filtered as well.
We need to check the return value of hist_entry__snprintf() and
ignore the hist if it is 0, which means it didn't get any callchain
matching the parent filter. This fixes the barf and the undesired
callchains.
Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
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For some reason if we declare a static variable and then assign it
later, and the assignment contains a __attribute__((__aligned__(#))),
some versions of gcc will ignore it.
This caused the syscall meta data to not be compact in its section
and caused a kernel oops when the section was being read.
The fix for these versions of gcc seems to be to add the aligned
attribute to the declaration as well.
This fixes the BZ regression:
https://bugzilla.kernel.org/show_bug.cgi?id=16353
Reported-by: Zeev Tarantov <zeev.tarantov@gmail.com>
Tested-by: Zeev Tarantov <zeev.tarantov@gmail.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <AANLkTinkKVmB0fpVeqUkMeqe3ZYeXJdI8xDuzJEOjYwh@mail.gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Hists have their hits increased by the event period. And this
period based counting is the foundation of all the stats in
perf report.
But callchains still use the raw number of hits, without taking
the period into account. So when we compute the percentage,
absolute based percentages are totally broken, and relative ones
too in the first parent level. Because we pass the number of events
muliplied by their period as the total number of hits to the
callchain filtering, while callchains expect this number to be
the number of raw hits.
perf report -g graph was simply not working, showing no graph unless
the min percent was zero. And even there the percentage of the
branches was always 0. And may be fractal filtering was broken on
the first branch level too.
flat also was broken, but it was hidden because of other breakages.
Anyway fix this by counting using periods on callchains.
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
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Initialize the callchain radix tree root correctly.
When we walk through the parents, we must stop after the root, but
since it wasn't well initialized, its parent pointer was random.
Also the number of hits was random because uninitialized, hence it
was part of the callchain while the root doesn't contain anything.
This fixes segfaults and percentages followed by empty callchains
while running:
perf report -g flat
Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: 2.6.31.x-2.6.34.x <stable@kernel.org>
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This gets rid of the default version fallback for Perf and
changes it so that it returns the version of the kernel from
it's Makefile (if sources were not from git, ie. if it was
downloaded from a tarball)
Signed-off-by: Thavidu Ranatunga <tharan@au1.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1278316815-6099-2-git-send-email-tharan@au1.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Changes the Perf --version string such that it shows the kernel
version as suggested by Ingo as follows:
That way the perf that comes with v2.6.34 will be:
perf version v2.6.34
while interim versions will have the version of the interim
kernel - for example:
perf version v2.6.35-rc4-70-g39ef13a
This functionality was already in the perf version generator
file except that it was looking for a .git in the perf directory
instead of the kernel directory.
Signed-off-by: Thavidu Ranatunga <tharan@au1.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1278316815-6099-1-git-send-email-tharan@au1.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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* master.kernel.org:/home/rmk/linux-2.6-arm:
ARM: 6205/1: perf: ensure counter delta is treated as unsigned
ARM: 6202/1: Do not ARM_DMA_MEM_BUFFERABLE on RealView boards with L210/L220
ARM: 6201/1: RealView: Do not use outer_sync() on ARM11MPCore boards with L220
ARM: 6195/1: OMAP3: pmu: make CPU_HAS_PMU dependent on OMAP3_EMU
ARM: 6194/1: change definition of cpu_relax() for ARM11MPCore
ARM: 6193/1: RealView: Align the machine_desc.phys_io to 1MB section
ARM: 6192/1: VExpress: Align the machine_desc.phys_io to 1MB section
ARM: 6188/1: Add a config option for the ARM11MPCore DMA cache maintenance workaround
ARM: 6187/1: The v6_dma_inv_range() function must preserve data on SMP
ARM: 6186/1: Avoid the CONSISTENT_DMA_SIZE warning on noMMU builds
ARM: mx3: mx31lilly: fix build error for !CONFIG_USB_ULPI
[ARM] mmp: fix build failure due to IRQ_PMU depends on ARCH_PXA
[ARM] pxa/mioa701: fix camera regression
[ARM] pxa/z2: fix flash layout to final version
[ARM] pxa/z2: fix missing include in battery driver
[ARM] pxa: fix incorrect gpio type in udc_pxa2xx.h
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf, x86: Fix incorrect branches event on AMD CPUs
perf tools: Fix find tids routine by excluding "." and ".."
x86: Send a SIGTRAP for user icebp traps
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We should initialize the module dynamic debug datastructures
only after determining that the module is not loaded yet. This
fixes a bug that introduced in 2.6.35-rc2, where when a trying
to load a module twice, we also load it's dynamic printing data
twice which causes all sorts of nasty issues. Also handle
the dynamic debug cleanup later on failure.
Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (removed a #ifdef)
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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* 'for-linus' of git://oss.sgi.com/xfs/xfs:
xfs: remove block number from inode lookup code
xfs: rename XFS_IGET_BULKSTAT to XFS_IGET_UNTRUSTED
xfs: validate untrusted inode numbers during lookup
xfs: always use iget in bulkstat
xfs: prevent swapext from operating on write-only files
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* 'merge-devicetree' of git://git.secretlab.ca/git/linux-2.6:
of/dma: fix build breakage in ppc4xx adma driver
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/i7core
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/i7core:
MAINTAINERS: Add an entry for i7core_edac
i7core_edac: Avoid doing multiple probes for the same card
i7core_edac: Properly discover the first QPI device
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git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6
* 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6:
kbuild: Propagate LOCALVERSION= down to scripts/setlocalversion
kbuild: Clean up and speed up the localversion logic
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Hardware performance counters on ARM are 32-bits wide but atomic64_t
variables are used to represent counter data in the hw_perf_event structure.
The armpmu_event_update function right-shifts a signed 64-bit delta variable
and adds the result to the event count. This can lead to shifting in sign-bits
if the MSB of the 32-bit counter value is set. This results in perf output
such as:
Performance counter stats for 'sleep 20':
18446744073460670464 cycles <-- 0xFFFFFFFFF12A6000
7783773 instructions # 0.000 IPC
465 context-switches
161 page-faults
1172393 branches
20.154242147 seconds time elapsed
This patch ensures that the delta value is treated as unsigned so that the
right shift sets the upper bits to zero.
Cc: <stable@kernel.org>
Acked-by: Jamie Iles <jamie.iles@picochip.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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While doing some performance counter validation tests on some
assembly language programs I noticed that the "branches:u"
count was very wrong on AMD machines.
It looks like the wrong event was selected.
Signed-off-by: Vince Weaver <vweaver1@eecs.utk.edu>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Robert Richter <robert.richter@amd.com>
Cc: Borislav Petkov <borislav.petkov@amd.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: <stable@kernel.org>
LKML-Reference: <alpine.DEB.2.00.1007011526010.23160@cl320.eecs.utk.edu>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Convert ppc4xx adma driver to use new node pointer location
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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While here, fixes the mailing list for i5400_edac
Acked-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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As Nehalem/Nehalem-EP/Westmere devices uses several devices for the same
functionality (memory controller), the default way of proping devices doesn't
work. So, instead of a per-device probe, all devices should be probed at once.
This means that we should block any new attempt of probe, otherwise, it will
try to register the same device several times.
Acked-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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On Nehalem/Nehalem-EP/Westmere, the first QPI device is the last PCI bus.
The last bus is generally at 0x3f or 0xff, but there are also other systems
using different setups. For example, HP Z800 has 0x7f as the last bus.
This patch adds a logic to discover the last bus, dynamically detecting it
at runtime.
Acked-by: Doug Thompson <dougthompson@xmission.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sched: Cure nr_iowait_cpu() users
init: Fix comment
init, sched: Fix race between init and kthreadd
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* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
amd64_edac: Fix syndrome calculation on K8
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When calculating the DCT channel from the syndrome we need to know the
syndrome type (x4 vs x8). On F10h, this is read out from extended PCI
cfg space register F3x180 while on K8 we only support x4 syndromes and
don't have extended PCI config space anyway.
Make the code accessing F3x180 F10h only and fall back to x4 syndromes
on everything else.
Cc: <stable@kernel.org> # .33.x .34.x
Reported-by: Jeffrey Merkey <jeffmerkey@gmail.com>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
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Conflicts:
Makefile
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RealView boards with certain revisions of the L210/L220 cache controller
may have issues (hardware deadlock) with the mandatory barriers (DSB
followed by an L2 cache sync) when ARM_DMA_MEM_BUFFERABLE is enabled.
The patch disables ARM_DMA_MEM_BUFFERABLE for these boards.
Tested-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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RealView boards with certain revisions of the L220 cache controller (ARM11*
processors only) may have issues (hardware deadlock) with the recent changes to
the mb() barrier implementation (DSB followed by an L2 cache sync). The patch
redefines the RealView ARM11MPCore mandatory barriers without the outer_sync()
call.
Cc: <stable@kernel.org>
Tested-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/anholt/drm-intel:
drm/i915: fix page flip finish vs. prepare on plane B
drm/i915: change default panel fitting mode to preserve aspect ratio
drm/i915: fix uninitialized variable warning in i915_setup_compression()
drm/i915: take struct_mutex in i915_dma_cleanup()
drm/i915: Fix CRT hotplug regression in 2.6.35-rc1
i915: fix ironlake edp panel setup (v4)
drm/i915: don't access FW_BLC_SELF on 965G
drm/i915: Account for space on the ring buffer consumed whilst wrapping.
drm/i915: gen3 page flipping fixes
drm/i915: don't queue flips during a flip pending event
drm/i915: Fix incorrect intel_ring_begin size in BSD ringbuffer.
drm/i915: Turn on 945 self-refresh only if single CRTC is active
drm/i915/gen4: Fix interrupt setup ordering
drm/i915: Use RSEN instead of HTPLG for tfp410 monitor detection.
drm/i915: Move non-phys cursors into the GTT
Revert "drm/i915: Don't enable pipe/plane/VCO early (wait for DPMS on)."
(Included the "fix page flip finish vs. prepare on plane B" patch from
Jesse on top of the pull request from Eric. -- Linus)
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The refreshed patch had a copy & paste bug.
Reported-by: Simon Farnsworth <simon.farnsworth@onelan.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
ata_generic: implement ATA_GEN_* flags and force enable DMA on MBP 7,1
ahci,ata_generic: let ata_generic handle new MBP w/ MCP89
libahci: Fix bug in storing EM messages
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When booting 2.6.35-rc3 on a x86 system without an ERST ACPI table with
the 'quiet' option, we still observe an "ERST: Table is not found!"
warning.
Quiesce it to the same info log level as the other 'table not found'
warnings.
Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Since commit 4bdadb9785696439c6e2b3efe34aa76df1149c83 ("drm/i915:
Selectively enable self-reclaim"), we've been passing GFP_MOVABLE to the
i915 page allocator where we weren't before due to some over-eager
removal of the page mapping gfp_flags games the code used to play.
This caused hibernate on Intel hardware to result in a lot of memory
corruptions on resume. See for example
http://bugzilla.kernel.org/show_bug.cgi?id=13811
Reported-by: Evengi Golov (in bugzilla)
Signed-off-by: Dave Airlie <airlied@redhat.com>
Tested-by: M. Vefa Bicakci <bicave@superonline.com>
Cc: stable@kernel.org
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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We did this a long time ago in the DDX driver, but now this fix belongs
in the kernel.
Preserving the aspect ratio is a nicer default.
Fixes https://bugs.freedesktop.org/show_bug.cgi?id=18033.
Tested-by: Josh Triplett <josh@freedesktop.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
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Fixes:
drivers/gpu/drm/i915/i915_dma.c: In function ‘i915_setup_compression’:
drivers/gpu/drm/i915/i915_dma.c:1311: error: ‘compressed_llb’ may be used uninitialized in this function
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
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intel_cleanup_ring_buffer() calls drm_gem_object_unreference() (as
opposed to drm_gem_object_unreference_unlocked()) so it needs to be
called with "struct_mutex" held. If we don't hold the lock, it triggers
a BUG_ON(!mutex_is_locked(&dev->struct_mutex));
I also audited the other places that call intel_cleanup_ring_buffer()
and they all hold the lock so they're OK.
This was introduced in: 8187a2b70e3 "drm/i915: introduce
intel_ring_buffer structure (V2)" and it's a regression from v2.6.34.
Addresses: https://bugzilla.kernel.org/show_bug.cgi?id=16247
Signed-off-by: Dan Carpenter <error27@gmail.com>
Reported-by: Benny Halevy <bhalevy@panasas.com>
Tested-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
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Commit 7a772c492fcfffae812ffca78a628e76fa57fe58 has two bugs which
made the hotplug problems on my laptop worse instead of better.
First, it did not, in fact, disable the CRT plug interrupt -- it
disabled all the other hotplug interrupts. It seems rather doubtful
that that bit of the patch fixed anything, so let's just remove it.
(If you want to add it back, you probably meant ~CRT_HOTPLUG_INT_EN.)
Second, on at least my GM45, setting CRT_HOTPLUG_ACTIVATION_PERIOD_64
and CRT_HOTPLUG_VOLTAGE_COMPARE_50 (when they were previously unset)
causes a hotplug interrupt about three seconds later. The old code
never restored PORT_HOTPLUG_EN so this could only happen once, but
they new code restores those registers. So just set those bits when
we set up the interrupt in the first place.
Signed-off-by: Andy Lutomirski <luto@mit.edu>
Signed-off-by: Eric Anholt <eric@anholt.net>
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The eDP spec claims a 20% overhead for the 8:10 encoding scheme used
on the wire. Take this into account when picking the lane/clock speed
for the panel.
v3: some panels are out of spec, try our best to deal with them, don't
refuse modes on eDP panels, and try the largest allowed settings if
all else fails on eDP.
v4: fix stupid typo, forgot to git add before amending.
Fixes several reports in bugzilla:
https://bugs.freedesktop.org/show_bug.cgi?id=28070
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
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The register offset for FW_BLC_SELF is a totally different set of bits
on Broadwater (it's actually MI_RDRET_STATE), so don't treat it like
FW_BLC_SELF on 965G chips.
Fixes bug https://bugs.freedesktop.org/show_bug.cgi?id=26874.
Cc: stable@kernel.org
Tested-by: Norman Yarvin <yarvin@yarchive.net>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
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If we fill the tail of the physical ring buffer with NOOP when wrapping,
we need to account for the reduction in available space.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Eric Anholt <eric@anholt.net>
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IDE mode of MCP89 on MBP 7,1 doesn't set DMA enable bits in the BMDMA
status register. Make the following changes to work around the problem.
* Instead of using hard coded 1 in id->driver_data as class code
match, use ATA_GEN_CLASS_MATCH and carry the matched id in
host->private_data.
* Instead of matching PCI_VENDOR_ID_CENATEK, use ATA_GEN_FORCE_DMA
flag in id instead.
* Add ATA_GEN_FORCE_DMA to the id entry of MBP 7,1.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Peer Chen <pchen@nvidia.com>
Cc: stable@kernel.org
Reported-by: Anders Østhus <grapz666@gmail.com>
Reported-by: Andreas Graf <andreas_graf@csgraf.de>
Reported-by: Benoit Gschwind <gschwind@gnu-log.net>
Reported-by: Damien Cassou <damien.cassou@gmail.com>
Reported-by: tixetsal@juno.com
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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For yet unknown reason, MCP89 on MBP 7,1 doesn't work w/ ahci under
linux but the controller doesn't require explicit mode setting and
works fine with ata_generic. Make ahci ignore the controller on MBP
7,1 and let ata_generic take it for now.
Reported in bko#15923.
https://bugzilla.kernel.org/show_bug.cgi?id=15923
NVIDIA is investigating why ahci mode doesn't work.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Peer Chen <pchen@nvidia.com>
Cc: stable@kernel.org
Reported-by: Anders Østhus <grapz666@gmail.com>
Reported-by: Andreas Graf <andreas_graf@csgraf.de>
Reported-by: Benoit Gschwind <gschwind@gnu-log.net>
Reported-by: Damien Cassou <damien.cassou@gmail.com>
Reported-by: tixetsal@juno.com
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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In function ahci_store_em_buffer(), if the input (signed char*) buffer
contains negative data, the constructed 32-bit long message data may
be wrong.
Signed-off-by: Harry Zhang <harry.zhang@amd.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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Introduce a filter function to skip "." and ".." directories when calculating
tid number, otherwise tid 0 will be included in the all_tid result array.
Cc: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <4C185F68.1020505@cn.fujitsu.com>
Signed-off-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
watchdog: docs: add an entry for imx2_wdt
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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: (27 commits)
drm/radeon/kms: remove rv100 bios connector quirk
drm/radeon/kms/pm: fix power state indexing on igp chips in dynpm mode
DRM / radeon / KMS: Fix hibernation regression related to radeon PM (was: Re: [Regression, post-2.6.34] Hibernation broken on machines with radeon/KMS and r300)
drm/radeon/kms/igp: fix possible divide by 0 in bandwidth code (v2)
drm/radeon: add quirk to make HP nx6125 laptop resume.
drm/radeon/kms: add some missing regs to evergreen gpu init
drm/radeon/kms: fix typos in evergreen command checker
drm/radeon/kms: avoid oops on mac r4xx cards
fb: fix colliding defines for fb flags.
drm/radeon/kms: Force HDP_NONSURF to maximum size
drm/radeon/kms: disable frac fb dividers for rs6xx
drm/radeon/kms: don't read attempt to read bios from VRAM on unposted GPU.
drm/radeon/kms: fix typo in evergreen_gpu_init
drm/radeon/kms: return ret in cursor_set failure path
drm/ttm: non pooled page allocation should have GFP_USER set
drm/radeon/r100/r200: fix calculation of compressed cube maps
drm/radeon/r200: handle more hw tex coord types
drm/radeon/kms: CS checker texture fixes for r1xx/r2xx/r3xx
drm/radeon: add fake RN50 table for powerpc
drm/fb: Fix video= mode computation
...
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