Commit Graph

361759 Commits

Author SHA1 Message Date
Alex Deucher
2e97be73e5 drm/radeon/evergreen+: don't enable HPD interrupts on eDP/LVDS
Avoids potential interrupt storms when the display is disabled.

May fix:
https://bugzilla.kernel.org/show_bug.cgi?id=56041

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2013-04-15 10:34:12 -04:00
Jerome Glisse
64d7b8bed8 drm/radeon: add si tile mode array query v3
Allow userspace to query for the tile mode array so userspace can properly
compute surface pitch and alignment requirement depending on tiling.

v2: Make strict aliasing safer by casting to char when copying
v3: merge fix from Christian

Signed-off-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-11 09:22:06 -04:00
Christian König
902aaef6c6 drm/radeon: add ring working query
Add new ioctl option and bumb minor version number.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-11 09:22:05 -04:00
Alex Deucher
cedb655a3a drm/radeon: handle broken disabled rb mask gracefully
If the disabled rb mask register is not properly initialized
program a sane default based on the number of RBs for the
asic.  This avoids a potential divide by 0 when calculating
the backend mask.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-11 09:22:04 -04:00
Alex Deucher
55b615aec6 drm/radeon: add pcie set/get lanes callbacks for newer asics
Uses the same functions as older asics.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:41 -04:00
Alex Deucher
d5445a17e7 drm/radeon: update r600 set/get pcie lane config
Updated to the preferred programming sequence.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:41 -04:00
Alex Deucher
492d2b61b3 drm/radeon/kms: replace *REG32_PCIE_P with *REG32_PCIE_PORT
Avoid confusion with the *REG32_P mask macro.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:40 -04:00
Alex Deucher
0363a55972 drm/radeon: remove unused blit remnants from si.c
We use the DMA ring rather than the GFX ring for
bo moves.  This code was never used and commented out.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:39 -04:00
Christian König
9a21059dc4 drm/radeon: add UVD tiling addr config v2
v2: set UVD tiling config for rv730

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
2013-04-09 10:31:39 -04:00
Christian König
ec5891fbe1 drm/radeon: init UVD clocks to sane defaults
Just until we get proper DPM for that.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:38 -04:00
Christian König
ef0e6e657c drm/radeon: add set_uvd_clocks callback for r7xx v3
v2: avoid 64bit divide
v3: rv740 uses the evegreen upll configuration

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
2013-04-09 10:31:37 -04:00
Christian König
2539eb02de drm/radeon: add set_uvd_clocks callback for SI
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:37 -04:00
Alex Deucher
a8b4925c79 drm/radeon: add set_uvd_clocks callback for evergreen
v2: remove unneeded register definitions

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:36 -04:00
Alex Deucher
23d33ba32b drm/radeon: add set_uvd_clocks callback for ON/LN/TN (v4)
v2: write clk registers only once!
v3: update cg scratch register properly
v4: add TN support

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:35 -04:00
Christian König
7062ab67d4 drm/radeon: add radeon_atom_get_clock_dividers helper
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:35 -04:00
Alex Deucher
73afc70d11 drm/radeon: add pm callback for setting uvd clocks
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:34 -04:00
Christian König
f2ba57b5ea drm/radeon: UVD bringup v8
Just everything needed to decode videos using UVD.

v6: just all the bugfixes and support for R7xx-SI merged in one patch
v7: UVD_CGC_GATE is a write only register, lockup detection fix
v8: split out VRAM fallback changes, remove support for RV770,
    add support for HEMLOCK, add buffer sizes checks

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:33 -04:00
Christian König
4474f3a91f drm/radeon: rework fallback handling v2
Let the CS module decide if we can fall back to VRAM or not.

v2: remove unintended change

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:33 -04:00
Christian König
574490401d drm/radeon: UVD doesn't needs VM on SI v2
v2: update error message and comment

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:32 -04:00
Samuel Li
a0a53aa8c7 drm/radeon: Use direct mapping for fast fb access on RS690
This patch allows the CPU to map the stolen vram segment
directly rather than going through the PCI BAR.  This
significantly improves performance for certain workloads with
a properly patched ddx.

Use radeon.fastfb=1 to enable it (disabled by default).
Currently only supported on RS690, but support for RS780/880
and newer APUs may be added eventually.

Signed-off-by: Samuel Li <samuel.li@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:31:31 -04:00
Alex Deucher
7c1c7c18fc drm/radeon/dce6: add missing display reg for tiling setup
A new tiling config register for the display blocks was
added on DCE6.

May fix:
https://bugs.freedesktop.org/show_bug.cgi?id=62889
https://bugs.freedesktop.org/show_bug.cgi?id=57919

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2013-04-09 10:23:50 -04:00
Alex Deucher
9ed8b1f93c drm/radeon: clean up vram/gtt location handling
Add a per-asic MC (memory controller) mask which holds the
mak address mask the asic is capable of.  Use this when
calculating the vram and gtt locations rather using asic
specific functions or limiting everything to 32 bits.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2013-04-09 10:23:50 -04:00
Alex Deucher
367cbe2fec drm/radeon: fix typo in rv515_mc_resume()
Doesn't affect anything as the same address gets written
in both cases.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2013-04-08 11:07:08 -04:00
Alex Deucher
411678288d drm/radeon: use frac fb div on RS780/RS880
Monitors seem to prefer it.  Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=37696

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2013-04-01 16:06:25 -04:00
Alex Deucher
bf05d99851 drm/radeon: don't use get_engine_clock() on APUs
It doesn't work reliably.  Just report back the currently
selected engine clock.

Partially fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=62493

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
2013-04-01 15:23:58 -04:00
Dave Airlie
7ac8833f59 Merge branch 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel into HEAD
Daniel writes:
"Just three revert/disable by default patches, one of them cc: stable
(since the offending commit was cc: stable, too)."

* 'drm-intel-fixes' of git://people.freedesktop.org/~danvet/drm-intel:
  Revert "drm/i915: write backlight harder"
  drm/i915: don't disable the power well yet
  Revert "drm/i915: set TRANSCODER_EDP even earlier"
2013-03-25 12:20:00 +10:00
Dave Airlie
ac165b006b Merge branch 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into HEAD
Inki writes:
Includes bug fixes and code cleanups.
And it considers some restrictions to G2D hardware.
With this, the malfunction and page fault issues to g2d driver
would be fixed.

* 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
  drm/exynos: Check g2d cmd list for g2d restrictions
  drm/exynos: Add a new function to get gem buffer size
  drm/exynos: Deal with g2d buffer info more efficiently
  drm/exynos: Clean up some G2D codes for readability
  drm/exynos: Fix G2D core malfunctioning issue
  drm/exynos: clear node object type at gem unmap
  drm/exynos: Fix error routine to getting dma addr.
  drm/exynos: Replaced kzalloc & memcpy with kmemdup
  drm/exynos: fimd: calculate the correct address offset
  drm/exynos: Make mixer_check_timing static
  drm/exynos: modify the compatible string for exynos fimd
2013-03-25 12:19:10 +10:00
Daniel Vetter
b1289371fc Revert "drm/i915: write backlight harder"
This reverts commit cf0a6584aa.

Turns out that cargo-culting breaks systems. Note that we can't revert
further, since

commit 770c12312a
Author: Takashi Iwai <tiwai@suse.de>
Date:   Sat Aug 11 08:56:42 2012 +0200

    drm/i915: Fix blank panel at reopening lid

fixed a regression in 3.6-rc kernels for which we've never figured out
the exact root cause. But some further inspection of the backlight
code reveals that it's seriously lacking locking. And especially the
asle backlight update is know to get fired (through some smm magic)
when writing specific backlight control registers. So the possibility
of suffering from races is rather real.

Until those races are fixed I don't think it makes sense to try
further hacks. Which sucks a bit, but sometimes that's how it is :(

References: http://www.mail-archive.com/intel-gfx@lists.freedesktop.org/msg18788.html
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=47941
Tested-by: Takashi Iwai <tiwai@suse.de>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: stable@vger.kernel.org (the reverted commit was cc: stable, too)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-03-24 13:23:20 +01:00
Paulo Zanoni
2124b72e62 drm/i915: don't disable the power well yet
We're still not 100% ready to disable the power well, so don't disable
it for now. When we disable it we break the audio driver (because some
of the audio registers are on the power well) and machines with eDP on
port D (because it doesn't use TRANSCODER_EDP).

Also, instead of just reverting the code, add a Kernel option to let
us disable it if we want. This will allow us to keep developing and
testing the feature while it's not enabled.

This fixes problems caused by the following commit:
  commit d6dd9eb1d9
  Author: Daniel Vetter <daniel.vetter@ffwll.ch>
  Date:   Tue Jan 29 16:35:20 2013 -0200
       drm/i915: dynamic Haswell display power well support

References: http://www.mail-archive.com/intel-gfx@lists.freedesktop.org/msg18788.html
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-03-24 13:22:33 +01:00
Daniel Vetter
bba2181c49 Revert "drm/i915: set TRANSCODER_EDP even earlier"
This reverts commit cc464b2a17.

The reason is that Takashi Iwai reported a regression bisected to this
commit:

http://www.mail-archive.com/intel-gfx@lists.freedesktop.org/msg18788.html

His machine has eDP on port D (usual desktop all-in-on setup), which
intel_dp.c identifies as an eDP panel, but the hsw ddi code
mishandles.

Closer inspection of the code reveals that haswell_crtc_mode_set also
checks intel_encoder_is_pch_edp when setting is_cpu_edp. On haswell
that doesn't make much sense (since there's no edp on the pch), but
what this function _really_ checks is whether that edp connector is on
port A or port D. It's just that on ilk-ivb port D was on the pch ...

So that explains why this seemingly innocent change killed eDP on port
D. Furthermore it looks like everything else accidentally works, since
we've never enabled eDP on port D support for hsw intentionally (e.g.
we still register the HDMI output for port D in that case).

But in retrospective I also don't like that this leaks highly platform
specific details into common code, and the reason is that the drm
vblank layer sucks. So instead I think we should:
- move the cpu_transcoder into the dynamic pipe_config tracking (once
  that's merged).
- fix up the drm vblank layer to finally deal with kms crtc objects
  instead of int pipes.

v2: Pimp commit message with the better diagnosis as discussed with
Paulo on irc.

Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-03-24 13:22:32 +01:00
Linus Torvalds
8bb9660418 Linux 3.9-rc4 2013-03-23 16:52:44 -07:00
Linus Torvalds
a607a1143a Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target fixes from Nicholas Bellinger:
 "These are mostly minor fixes this time around.  The iscsi-target CHAP
  big-endian bugfix and bump FD_MAX_SECTORS=2048 default patch to allow
  1MB sized I/Os for FILEIO backends on >= v3.5 code are both CC'ed to
  stable.

  Also, there is a persistent reservations regression that has recently
  been reported for >= v3.8.x code, that is currently being tracked down
  for v3.9."

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  target/pscsi: Reject cross page boundary case in pscsi_map_sg
  target/file: Bump FD_MAX_SECTORS to 2048 to handle 1M sized I/Os
  tcm_vhost: Flush vhost_work in vhost_scsi_flush()
  tcm_vhost: Add missed lock in vhost_scsi_clear_endpoint()
  target: fix possible memory leak in core_tpg_register()
  target/iscsi: Fix mutual CHAP auth on big-endian arches
  target_core_sbc: use noop for SYNCHRONIZE_CACHE
2013-03-23 16:51:55 -07:00
Linus Torvalds
22c3f2fff6 A few bugfixes for md
- recent regressions in raid5
  - recent regressions in dmraid
  - a few instances of CONFIG_MULTICORE_RAID456 linger
 
 Several tagged for -stable
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Merge tag 'md-3.9-fixes' of git://neil.brown.name/md

Pull md fixes from NeilBrown:
 "A few bugfixes for md

   - recent regressions in raid5
   - recent regressions in dmraid
   - a few instances of CONFIG_MULTICORE_RAID456 linger

  Several tagged for -stable"

* tag 'md-3.9-fixes' of git://neil.brown.name/md:
  md: remove CONFIG_MULTICORE_RAID456 entirely
  md/raid5: ensure sync and DISCARD don't happen at the same time.
  MD: Prevent sysfs operations on uninitialized kobjects
  MD RAID5: Avoid accessing gendisk or queue structs when not available
  md/raid5: schedule_construction should abort if nothing to do.
2013-03-23 15:49:49 -07:00
Linus Torvalds
c8c1f16717 Simple stuff. See one-line summaries.
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Merge tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev

Pull libata updates from Jeff Garzik:
 "Simple stuff.  See one-line summaries."

* tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  pata_samsung_cf: use module_platform_driver_probe()
  [libata] Avoid specialized TLA's in ZPODD's Kconfig
  libata-acpi.c: fix copy and paste mistake in ata_acpi_register_power_resource
  sata_fsl: Remove redundant NULL check before kfree
  ahci: Add Device IDs for Intel Wellsburg PCH
  ata_piix: Add MODULE_PARM_DESC to prefer_ms_hyperv
2013-03-23 12:33:36 -07:00
Linus Torvalds
df2a8f39cd Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c fixes from Wolfram Sang:
 "One bugfix for the tegra driver.  Two updates regarding email
  addresses and MAINTAINERS which I like to have up-to-date so people
  can be reached immediately.  While we are here, there is on PCI_ID
  addition."

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  MAINTAINERS: add maintainer entry for atmel i2c driver
  i2c: Fix my e-mail address in drivers and documentation
  i2c: iSMT: add Intel Avoton DeviceIDs
  i2c: tegra: check the clk_prepare_enable() return value
2013-03-23 12:32:14 -07:00
Linus Torvalds
a4e71e7937 Merge git://www.linux-watchdog.org/linux-watchdog
Pull watchdog fixes from Wim Van Sebroeck:
 "Fix a boot issues and correct the AcpiMmioSel bitmask in the
  sp5100_tco watchdog device driver"

* git://www.linux-watchdog.org/linux-watchdog:
  watchdog: sp5100_tco: Set the AcpiMmioSel bitmask value to 1 instead of 2
  watchdog: sp5100_tco: Remove code that may cause a boot failure
2013-03-23 12:30:39 -07:00
Torsten Duwe
c19b3b0f6e KMS: fix EDID detailed timing frame rate
When KMS has parsed an EDID "detailed timing", it leaves the frame rate
zeroed.  Consecutive (debug-) output of that mode thus yields 0 for
vsync.  This simple fix also speeds up future invocations of
drm_mode_vrefresh().

While it is debatable whether this qualifies as a -stable fix I'd apply
it for consistency's sake; drm_helper_probe_single_connector_modes()
does the same thing already for all probed modes.

Cc: stable@vger.kernel.org
Signed-off-by: Torsten Duwe <duwe@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-23 10:46:10 -07:00
Torsten Duwe
16dad1d743 KMS: fix EDID detailed timing vsync parsing
EDID spreads some values across multiple bytes; bit-fiddling is needed
to retrieve these.  The current code to parse "detailed timings" has a
cut&paste error that results in a vsync offset of at most 15 lines
instead of 63.

See

   http://en.wikipedia.org/wiki/EDID

and in the "EDID Detailed Timing Descriptor" see bytes 10+11 show why
that needs to be a left shift.

Cc: stable@vger.kernel.org
Signed-off-by: Torsten Duwe <duwe@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-23 10:46:10 -07:00
Linus Torvalds
5da273fe3f Merge git://git.infradead.org/users/willy/linux-nvme
Pull NVMe driver update from Matthew Wilcox:
 "These patches have mostly been baking for a few months; sorry I didn't
  get them in during the merge window.  They're all bug fixes, except
  for the addition of the SMART log and the addition to MAINTAINERS."

* git://git.infradead.org/users/willy/linux-nvme:
  NVMe: Add namespaces with no LBA range feature
  MAINTAINERS: Add entry for the NVMe driver
  NVMe: Initialize iod nents to 0
  NVMe: Define SMART log
  NVMe: Add result to nvme_get_features
  NVMe: Set result from user admin command
  NVMe: End queued bio requests when freeing queue
  NVMe: Free cmdid on nvme_submit_bio error
2013-03-22 16:43:53 -07:00
Linus Torvalds
14629ed314 Merge branch 'akpm' (fixes from Andrew)
Merge misc fixes from Andrew Morton.

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mqueue: sys_mq_open: do not call mnt_drop_write() if read-only
  mm/hotplug: only free wait_table if it's allocated by vmalloc
  dma-debug: update DMA debug API to better handle multiple mappings of a buffer
  dma-debug: fix locking bug in check_unmap()
  drivers/rtc/rtc-at91rm9200.c: use a variable for storing IMR
  drivers/video/ep93xx-fb.c: include <linux/io.h> for devm_ioremap()
  drivers/rtc/rtc-da9052.c: fix for rtc device registration
  mm: zone_end_pfn is too small
  poweroff: change orderly_poweroff() to use schedule_work()
  mm/hugetlb: fix total hugetlbfs pages count when using memory overcommit accouting
  printk: Provide a wake_up_klogd() off-case
  irq_work.h: fix warning when CONFIG_IRQ_WORK=n
2013-03-22 16:41:44 -07:00
Vladimir Davydov
38d78e587d mqueue: sys_mq_open: do not call mnt_drop_write() if read-only
mnt_drop_write() must be called only if mnt_want_write() succeeded,
otherwise the mnt_writers counter will diverge.

mnt_writers counters are used to check if remounting FS as read-only is
OK, so after an extra mnt_drop_write() call, it would be impossible to
remount mqueue FS as read-only.  Besides, on umount a warning would be
printed like this one:

  =====================================
  [ BUG: bad unlock balance detected! ]
  3.9.0-rc3 #5 Not tainted
  -------------------------------------
  a.out/12486 is trying to release lock (sb_writers) at:
  mnt_drop_write+0x1f/0x30
  but there are no more locks to release!

Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Cc: Doug Ledford <dledford@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-22 16:41:21 -07:00
Jianguo Wu
ca4b3f302c mm/hotplug: only free wait_table if it's allocated by vmalloc
zone->wait_table may be allocated from bootmem, it can not be freed.

Signed-off-by: Jianguo Wu <wujianguo@huawei.com>
Reviewed-by: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Tang Chen <tangchen@cn.fujitsu.com>
Cc: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-22 16:41:20 -07:00
Alexander Duyck
96e7d7a1e0 dma-debug: update DMA debug API to better handle multiple mappings of a buffer
There were reports of the igb driver unmapping buffers without calling
dma_mapping_error.  On closer inspection issues were found in the DMA
debug API and how it handled multiple mappings of the same buffer.

The issue I found is the fact that the debug_dma_mapping_error would
only set the map_err_type to MAP_ERR_CHECKED in the case that the was
only one match for device and device address.  However in the case of
non-IOMMU, multiple addresses existed and as a result it was not setting
this field once a second mapping was instantiated.  I have resolved this
by changing the search so that it instead will now set MAP_ERR_CHECKED
on the first buffer that matches the device and DMA address that is
currently in the state MAP_ERR_NOT_CHECKED.

A secondary side effect of this patch is that in the case of multiple
buffers using the same address only the last mapping will have a valid
map_err_type.  The previous mappings will all end up with map_err_type
set to MAP_ERR_CHECKED because of the dma_mapping_error call in
debug_dma_map_page.  However this behavior may be preferable as it means
you will likely only see one real error per multi-mapped buffer, versus
the current behavior of multiple false errors mer multi-mapped buffer.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Reviewed-by: Shuah Khan <shuah.khan@hp.com>
Tested-by: Shuah Khan <shuah.khan@hp.com>
Cc: Jakub Kicinski <kubakici@wp.pl>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-22 16:41:20 -07:00
Alexander Duyck
8d640a51ec dma-debug: fix locking bug in check_unmap()
In check_unmap() it is possible to get into a dead-locked state if
dma_mapping_error is called.  The problem is that the bucket is locked in
check_unmap, and locked again by debug_dma_mapping_error which is called
by dma_mapping_error.  To resolve that we must release the lock on the
bucket before making the call to dma_mapping_error.

[akpm@linux-foundation.org: restore 80-col trickery to be consistent with the rest of the file]
Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Cc: Joerg Roedel <joro@8bytes.org>
Reviewed-by: Shuah Khan <shuah.khan@hp.com>
Tested-by: Shuah Khan <shuah.khan@hp.com>
Cc: Jakub Kicinski <kubakici@wp.pl>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-22 16:41:20 -07:00
Nicolas Ferre
0ef1594c01 drivers/rtc/rtc-at91rm9200.c: use a variable for storing IMR
On some revisions of AT91 SoCs, the RTC IMR register is not working.
Instead of elaborating a workaround for that specific SoC or IP version,
we simply use a software variable to store the Interrupt Mask Register
and modify it for each enabling/disabling of an interrupt.  The overhead
of this is negligible anyway.

The interrupt mask register (IMR) for the RTC is broken on the AT91SAM9x5
sub-family of SoCs (good overview of the members here:
http://www.eewiki.net/display/linuxonarm/AT91SAM9x5 ).  The "user visible
effect" is the RTC doesn't work.

That sub-family is less than two years old and only has devicetree (DT)
support and came online circa lk 3.7 .  The dust is yet to settle on the
DT stuff at least for AT91 SoCs (translation: lots of stuff is still
broken, so much that it is hard to know where to start).

The fix in the patch is pretty simple: just shadow the silicon IMR
register with a variable in the driver.  Some older SoCs (pre-DT) use the
the rtc-at91rm9200 driver (e.g.  obviously the AT91RM9200) and they should
not be impacted by the change.  There shouldn't be a large volume of
interrupts associated with a RTC.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Reported-by: Douglas Gilbert <dgilbert@interlog.com>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: Ludovic Desroches <ludovic.desroches@atmel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-22 16:41:20 -07:00
H Hartley Sweeten
e66b05873a drivers/video/ep93xx-fb.c: include <linux/io.h> for devm_ioremap()
Commit be86781497 ("drivers/video/ep93xx-fb.c: use devm_ functions")
introduced a build error:

  drivers/video/ep93xx-fb.c: In function 'ep93xxfb_probe':
  drivers/video/ep93xx-fb.c:532: error: implicit declaration of function 'devm_ioremap'
  drivers/video/ep93xx-fb.c:533: warning: assignment makes pointer from integer without a cast

Include <linux/io.h> to pickup the declaration of 'devm_ioremap'.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Acked-by: Ryan Mallon <rmallon@gmail.com>
Cc: Damien Cassou <damien.cassou@lifl.fr>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-22 16:41:20 -07:00
Ashish Jangam
925e8ea6bc drivers/rtc/rtc-da9052.c: fix for rtc device registration
Add support for the virtual irq since now MFD only handles virtual irq
Without this patch rtc device will fail in registration.

(akpm: Ashish has a different version whcih will be needed for 3.8.x and
earlier kernels)

Signed-off-by: Ashish <ashish.jangam@kpitcummins.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-22 16:41:20 -07:00
Russ Anderson
f9228b204f mm: zone_end_pfn is too small
Booting with 32 TBytes memory hits BUG at mm/page_alloc.c:552! (output
below).

The key hint is "page 4294967296 outside zone".
4294967296 = 0x100000000 (bit 32 is set).

The problem is in include/linux/mmzone.h:

  530 static inline unsigned zone_end_pfn(const struct zone *zone)
  531 {
  532         return zone->zone_start_pfn + zone->spanned_pages;
  533 }

zone_end_pfn is "unsigned" (32 bits).  Changing it to "unsigned long"
(64 bits) fixes the problem.

zone_end_pfn() was added recently in commit 108bcc96ef ("mm: add & use
zone_end_pfn() and zone_spans_pfn()")

Output from the failure.

  No AGP bridge found
  page 4294967296 outside zone [ 4294967296 - 4327469056 ]
  ------------[ cut here ]------------
  kernel BUG at mm/page_alloc.c:552!
  invalid opcode: 0000 [#1] SMP
  Modules linked in:
  CPU 0
  Pid: 0, comm: swapper Not tainted 3.9.0-rc2.dtp+ #10
  RIP: free_one_page+0x382/0x430
  Process swapper (pid: 0, threadinfo ffffffff81942000, task ffffffff81955420)
  Call Trace:
    __free_pages_ok+0x96/0xb0
    __free_pages+0x25/0x50
    __free_pages_bootmem+0x8a/0x8c
    __free_memory_core+0xea/0x131
    free_low_memory_core_early+0x4a/0x98
    free_all_bootmem+0x45/0x47
    mem_init+0x7b/0x14c
    start_kernel+0x216/0x433
    x86_64_start_reservations+0x2a/0x2c
    x86_64_start_kernel+0x144/0x153
  Code: 89 f1 ba 01 00 00 00 31 f6 d3 e2 4c 89 ef e8 66 a4 01 00 e9 2c fe ff ff 0f 0b eb fe 0f 0b 66 66 2e 0f 1f 84 00 00 00 00 00 eb f3 <0f> 0b eb fe 0f 0b 0f 1f 84 00 00 00 00 00 eb f6 0f 0b eb fe 49

Signed-off-by: Russ Anderson <rja@sgi.com>
Reported-by: George Beshers <gbeshers@sgi.com>
Acked-by: Hedi Berriche <hedi@sgi.com>
Cc: Cody P Schafer <cody@linux.vnet.ibm.com>
Cc: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-22 16:41:20 -07:00
Oleg Nesterov
2ca067efd8 poweroff: change orderly_poweroff() to use schedule_work()
David said:

    Commit 6c0c0d4d10 ("poweroff: fix bug in orderly_poweroff()")
    apparently fixes one bug in orderly_poweroff(), but introduces
    another.  The comments on orderly_poweroff() claim it can be called
    from any context - and indeed we call it from interrupt context in
    arch/powerpc/platforms/pseries/ras.c for example.  But since that
    commit this is no longer safe, since call_usermodehelper_fns() is not
    safe in interrupt context without the UMH_NO_WAIT option.

orderly_poweroff() can be used from any context but UMH_WAIT_EXEC is
sleepable.  Move the "force" logic into __orderly_poweroff() and change
orderly_poweroff() to use the global poweroff_work which simply calls
__orderly_poweroff().

While at it, remove the unneeded "int argc" and change argv_split() to
use GFP_KERNEL.

We use the global "bool poweroff_force" to pass the argument, this can
obviously affect the previous request if it is pending/running.  So we
only allow the "false => true" transition assuming that the pending
"true" should succeed anyway.  If schedule_work() fails after that we
know that work->func() was not called yet, it must see the new value.

This means that orderly_poweroff() becomes async even if we do not run
the command and always succeeds, schedule_work() can only fail if the
work is already pending.  We can export __orderly_poweroff() and change
the non-atomic callers which want the old semantics.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reported-by: David Gibson <david@gibson.dropbear.id.au>
Cc: Lucas De Marchi <lucas.demarchi@profusion.mobi>
Cc: Feng Hong <hongfeng@marvell.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Serge Hallyn <serge.hallyn@canonical.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-22 16:41:20 -07:00
Wanpeng Li
d00285884c mm/hugetlb: fix total hugetlbfs pages count when using memory overcommit accouting
hugetlb_total_pages is used for overcommit calculations but the current
implementation considers only the default hugetlb page size (which is
either the first defined hugepage size or the one specified by
default_hugepagesz kernel boot parameter).

If the system is configured for more than one hugepage size, which is
possible since commit a137e1cc6d ("hugetlbfs: per mount huge page
sizes") then the overcommit estimation done by __vm_enough_memory()
(resp.  shown by meminfo_proc_show) is not precise - there is an
impression of more available/allowed memory.  This can lead to an
unexpected ENOMEM/EFAULT resp.  SIGSEGV when memory is accounted.

Testcase:
  boot: hugepagesz=1G hugepages=1
  the default overcommit ratio is 50
  before patch:

    egrep 'CommitLimit' /proc/meminfo
    CommitLimit:     55434168 kB

  after patch:

    egrep 'CommitLimit' /proc/meminfo
    CommitLimit:     54909880 kB

[akpm@linux-foundation.org: coding-style tweak]
Signed-off-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: <stable@vger.kernel.org>		[3.0+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-03-22 16:41:20 -07:00