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This is the 3.10.79 stable release
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commit 3916e3fd81021fb795bfbdb17f375b6b3685bced upstream.
Single channel LVDS maxes out at 112 MHz. The 15" pre-retina models
shipped with 1440x900 (106 MHz) by default or 1680x1050 (119 MHz)
as a BTO option, both versions used dual channel LVDS even though
the smaller one would have fit into a single channel.
Notes:
Bug report showing that the MacBookPro8,2 with 1440x900 uses dual
channel LVDS (this lead to it being hardcoded in intel_lvds.c by
Daniel Vetter with commit 618563e3945b9d0864154bab3c607865b557cecc):
https://bugzilla.kernel.org/show_bug.cgi?id=42842
If i915.lvds_channel_mode=2 is missing even though the machine needs
it, every other vertical line is white and consequently, only the left
half of the screen is visible (verified by myself on a MacBookPro9,1).
Forum posting concerning a MacBookPro6,2 with 1440x900, author is
using i915.lvds_channel_mode=2 on the kernel command line, proving
that the machine uses dual channels:
https://bbs.archlinux.org/viewtopic.php?id=185770
Chi Mei N154C6-L04 with 1440x900 is a replacement panel for all
MacBook Pro "A1286" models, and that model number encompasses the
MacBookPro6,2 / 8,2 / 9,1. Page 17 of the panel's datasheet shows it's
driven with dual channel LVDS:
http://www.ebay.com/itm/-/400690878560
http://www.everymac.com/ultimate-mac-lookup/?search_keywords=A1286
http://www.taopanel.com/chimei/datasheet/N154C6-L04.pdf
Those three 15" models, MacBookPro6,2 / 8,2 / 9,1, are the only ones
with i915 graphics and dual channel LVDS, so that list should be
complete. And the 8,2 is already in intel_lvds.c.
Possible motivation to use dual channel LVDS even on the 1440x900
models: Reduce the number of different parts, i.e. use identical logic
boards and display cabling on both versions and the only differing
component is the panel.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Acked-by: Jani Nikula <jani.nikula@intel.com>
[Jani: included notes in the commit message for posterity]
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This is the 3.10.77 stable release
Conflicts:
drivers/video/console/Kconfig
scripts/kconfig/menu.c
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commit 9535c4757b881e06fae72a857485ad57c422b8d2 upstream.
The hardware, according to the specs, is limited to 256 byte transfers,
and current driver has no protections in case users attempt to do larger
transfers. The code will just stomp over status register and mayhem
ensues.
Let's split larger transfers into digestable chunks. Doing this allows
Atmel MXT driver on Pixel 1 function properly (it hasn't since commit
9d8dc3e529a19e427fd379118acd132520935c5d "Input: atmel_mxt_ts -
implement T44 message handling" which tries to consume multiple
touchscreen/touchpad reports in a single transaction).
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit fd99a0943ffaa0320ea4f69d09ed188f950c0432 upstream.
Use the correct flags for atom.
v2: handle DRM_MODE_FLAG_DBLCLK
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f2c9e560b406f2f6b14b345c7da33467dee9cdf2 upstream.
Use readb() and memcpy_fromio() accessors instead.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This fixes the following warnings when building for arm64...
drivers/gpu/drm/drm_gem_cma_helper.c: In function ‘drm_gem_cma_descr ibe’:
drivers/gpu/drm/drm_gem_cma_helper.c:273:4: warning: format ‘%Zx’ expects argument of type ‘size_t’, but argument 6 has type ‘dma_addr_t’ [-Wformat=]
off, cma_obj->paddr, cma_obj->vaddr, obj->size);
^
drivers/gpu/drm/drm_gem_cma_helper.c:273:4: warning: format ‘%d’ expects argument of type ‘int’, but argument 8 has type ‘size_t’ [-Wformat=]
Signed-off-by: Jon Medhurst <tixy@linaro.org>
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commit a17d4996e051e78d164989b894608cf37cd5110b upstream.
Just keep it working, seems to fix some PLL problems.
Bug: https://bugs.freedesktop.org/show_bug.cgi?id=73378
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 54acf107e4e66d1f4a697e08a7f60dba9fcf07c3 upstream.
To make sure the writes go through the pci bridge.
bug:
https://bugzilla.kernel.org/show_bug.cgi?id=90741
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 0586915ec10d0ae60de5cd3381ad25a704760402 upstream.
To make sure the writes go through the pci bridge.
bug:
https://bugzilla.kernel.org/show_bug.cgi?id=90741
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 9d1393f23d5656cdd5f368efd60694d4aeed81d3 upstream.
To make sure the writes go through the pci bridge.
bug:
https://bugzilla.kernel.org/show_bug.cgi?id=90741
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f957063fee6392bb9365370db6db74dc0b2dce0a upstream.
To make sure the writes go through the pci bridge.
bug:
https://bugzilla.kernel.org/show_bug.cgi?id=90741
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit c320bb5f6dc0cb88a811cbaf839303e0a3916a92 upstream.
To make sure the writes go through the pci bridge.
bug:
https://bugzilla.kernel.org/show_bug.cgi?id=90741
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit a28b2a47edcd0cb7c051b445f71a426000394606 upstream.
Passing zeroed drm_radeon_cs struct to DRM_IOCTL_RADEON_CS produces the
following oops.
Fix by always calling INIT_LIST_HEAD() to avoid the crash in list_sort().
----------------------------------
#include <stdint.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <drm/radeon_drm.h>
static const struct drm_radeon_cs cs;
int main(int argc, char **argv)
{
return ioctl(open(argv[1], O_RDWR), DRM_IOCTL_RADEON_CS, &cs);
}
----------------------------------
[ttrantal@test2 ~]$ ./main /dev/dri/card0
[ 46.904650] BUG: unable to handle kernel NULL pointer dereference at (null)
[ 46.905022] IP: [<ffffffff814d6df2>] list_sort+0x42/0x240
[ 46.905022] PGD 68f29067 PUD 688b5067 PMD 0
[ 46.905022] Oops: 0002 [#1] SMP
[ 46.905022] CPU: 0 PID: 2413 Comm: main Not tainted 4.0.0-rc1+ #58
[ 46.905022] Hardware name: Hewlett-Packard HP Compaq dc5750 Small Form Factor/0A64h, BIOS 786E3 v02.10 01/25/2007
[ 46.905022] task: ffff880058e2bcc0 ti: ffff880058e64000 task.ti: ffff880058e64000
[ 46.905022] RIP: 0010:[<ffffffff814d6df2>] [<ffffffff814d6df2>] list_sort+0x42/0x240
[ 46.905022] RSP: 0018:ffff880058e67998 EFLAGS: 00010246
[ 46.905022] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 46.905022] RDX: ffffffff81644410 RSI: ffff880058e67b40 RDI: ffff880058e67a58
[ 46.905022] RBP: ffff880058e67a88 R08: 0000000000000000 R09: 0000000000000000
[ 46.905022] R10: ffff880058e2bcc0 R11: ffffffff828e6ca0 R12: ffffffff81644410
[ 46.905022] R13: ffff8800694b8018 R14: 0000000000000000 R15: ffff880058e679b0
[ 46.905022] FS: 00007fdc65a65700(0000) GS:ffff88006d600000(0000) knlGS:0000000000000000
[ 46.905022] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 46.905022] CR2: 0000000000000000 CR3: 0000000058dd9000 CR4: 00000000000006f0
[ 46.905022] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 46.905022] DR3: 0000000000000000 DR6: 00000000ffff4ff0 DR7: 0000000000000400
[ 46.905022] Stack:
[ 46.905022] ffff880058e67b40 ffff880058e2bcc0 ffff880058e67a78 0000000000000000
[ 46.905022] 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[ 46.905022] 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[ 46.905022] Call Trace:
[ 46.905022] [<ffffffff81644a65>] radeon_cs_parser_fini+0x195/0x220
[ 46.905022] [<ffffffff81645069>] radeon_cs_ioctl+0xa9/0x960
[ 46.905022] [<ffffffff815e1f7c>] drm_ioctl+0x19c/0x640
[ 46.905022] [<ffffffff810f8fdd>] ? trace_hardirqs_on_caller+0xfd/0x1c0
[ 46.905022] [<ffffffff810f90ad>] ? trace_hardirqs_on+0xd/0x10
[ 46.905022] [<ffffffff8160c066>] radeon_drm_ioctl+0x46/0x80
[ 46.905022] [<ffffffff81211868>] do_vfs_ioctl+0x318/0x570
[ 46.905022] [<ffffffff81462ef6>] ? selinux_file_ioctl+0x56/0x110
[ 46.905022] [<ffffffff81211b41>] SyS_ioctl+0x81/0xa0
[ 46.905022] [<ffffffff81dc6312>] system_call_fastpath+0x12/0x17
[ 46.905022] Code: 48 89 b5 10 ff ff ff 0f 84 03 01 00 00 4c 8d bd 28 ff ff
ff 31 c0 48 89 fb b9 15 00 00 00 49 89 d4 4c 89 ff f3 48 ab 48 8b 46 08 <48> c7
00 00 00 00 00 48 8b 0e 48 85 c9 0f 84 7d 00 00 00 c7 85
[ 46.905022] RIP [<ffffffff814d6df2>] list_sort+0x42/0x240
[ 46.905022] RSP <ffff880058e67998>
[ 46.905022] CR2: 0000000000000000
[ 47.149253] ---[ end trace 09576b4e8b2c20b8 ]---
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Tommi Rantala <tt.rantala@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit dbfb00c3e7e18439f2ebf67fe99bf7a50b5bae1e upstream.
The logic was reversed from what the hw actually exposed.
Fixes graphics corruption in certain harvest configurations.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 226e5ae9e5f9108beb0bde4ac69f68fe6210fed9 upstream.
If CONFIG_DEBUG_MUTEXES is set, the mutex->owner field is only cleared
if the mutex debugging is enabled which introduces a race in our
mutex_is_locked_by() - i.e. we may inspect the old owner value before it
is acquired by the new task.
This is the root cause of this error:
# diff --git a/kernel/locking/mutex-debug.c b/kernel/locking/mutex-debug.c
# index 5cf6731..3ef3736 100644
# --- a/kernel/locking/mutex-debug.c
# +++ b/kernel/locking/mutex-debug.c
# @@ -80,13 +80,13 @@ void debug_mutex_unlock(struct mutex *lock)
# DEBUG_LOCKS_WARN_ON(lock->owner != current);
#
# DEBUG_LOCKS_WARN_ON(!lock->wait_list.prev && !lock->wait_list.next);
# - mutex_clear_owner(lock);
# }
#
# /*
# * __mutex_slowpath_needs_to_unlock() is explicitly 0 for debug
# * mutexes so that we can do it here after we've verified state.
# */
# + mutex_clear_owner(lock);
# atomic_set(&lock->count, 1);
# }
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=87955
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit add284a3a2481e759d6bec35f6444c32c8ddc383 upstream.
In order to act as a full command barrier by itself, we need to tell the
pipecontrol to actually stall the command streamer while the flush runs.
We require the full command barrier before operations like
MI_SET_CONTEXT, which currently rely on a prior invalidate flush.
References: https://bugs.freedesktop.org/show_bug.cgi?id=83677
Cc: Simon Farnsworth <simon@farnz.org.uk>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 148b83d0815a3778c8949e6a97cb798cbaa0efb3 upstream.
In the gen7 pipe control there is an extra bit to flush the media
caches, so let's set it during cache invalidation flushes.
v2: Rename to MEDIA_STATE_CLEAR to be more inline with spec.
Cc: Simon Farnsworth <simon@farnz.org.uk>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 410cce2a6b82299b46ff316c6384e789ce275ecb upstream.
The check was already in place in the dp mode_valid check, but
radeon_dp_get_dp_link_clock() never returned the high clock
mode_valid was checking for because that function clipped the
clock based on the hw capabilities. Add an explicit check
in the mode_valid function.
bug:
https://bugs.freedesktop.org/show_bug.cgi?id=87172
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 5e5c21cac1001089007260c48b0c89ebaace0e71 upstream.
Check the that ring we are using for copies is functional
rather than the GFX ring. On newer asics we use the DMA
ring for bo moves.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 89669e7a7f96be3ee8d9a22a071d7c0d3b4428fc upstream.
The commit "vmwgfx: Rework fence event action" introduced a number of bugs
that are fixed with this commit:
a) A forgotten return stateemnt.
b) An if statement with identical branches.
Reported-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit b0616c5306b342ceca07044dbc4f917d95c4f825 upstream.
Otherwise we'll have backtraces in assert_panel_unlocked because the
BIOS locks the register. In the reporter's case this regression was
introduced in
commit c31407a3672aaebb4acddf90944a114fa5c8af7b
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu Oct 18 21:07:01 2012 +0100
drm/i915: Add no-lvds quirk for Supermicro X7SPA-H
Reported-by: Alexey Orishko <alexey.orishko@gmail.com>
Cc: Alexey Orishko <alexey.orishko@gmail.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Francois Tigeot <ftigeot@wolfpond.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Tested-by: Alexey Orishko <alexey.orishko@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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3.18.0-rc6
commit f5475cc43c899e33098d4db44b7c5e710f16589d upstream.
I was unable too boot 3.18.0-rc6 because of the following kernel
panic in drm_calc_vbltimestamp_from_scanoutpos():
[drm] Initialized drm 1.1.0 20060810
[drm] radeon kernel modesetting enabled.
[drm] initializing kernel modesetting (RV100 0x1002:0x515E 0x15D9:0x8080).
[drm] register mmio base: 0xC8400000
[drm] register mmio size: 65536
radeon 0000:0b:01.0: VRAM: 128M 0x00000000D0000000 - 0x00000000D7FFFFFF (16M used)
radeon 0000:0b:01.0: GTT: 512M 0x00000000B0000000 - 0x00000000CFFFFFFF
[drm] Detected VRAM RAM=128M, BAR=128M
[drm] RAM width 16bits DDR
[TTM] Zone kernel: Available graphics memory: 3829346 kiB
[TTM] Zone dma32: Available graphics memory: 2097152 kiB
[TTM] Initializing pool allocator
[TTM] Initializing DMA pool allocator
[drm] radeon: 16M of VRAM memory ready
[drm] radeon: 512M of GTT memory ready.
[drm] GART: num cpu pages 131072, num gpu pages 131072
[drm] PCI GART of 512M enabled (table at 0x0000000037880000).
radeon 0000:0b:01.0: WB disabled
radeon 0000:0b:01.0: fence driver on ring 0 use gpu addr 0x00000000b0000000 and cpu addr 0xffff8800bbbfa000
[drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[drm] Driver supports precise vblank timestamp query.
[drm] radeon: irq initialized.
[drm] Loading R100 Microcode
radeon 0000:0b:01.0: Direct firmware load for radeon/R100_cp.bin failed with error -2
radeon_cp: Failed to load firmware "radeon/R100_cp.bin"
[drm:r100_cp_init] *ERROR* Failed to load firmware!
radeon 0000:0b:01.0: failed initializing CP (-2).
radeon 0000:0b:01.0: Disabling GPU acceleration
[drm] radeon: cp finalized
BUG: unable to handle kernel NULL pointer dereference at 000000000000025c
IP: [<ffffffff8150423b>] drm_calc_vbltimestamp_from_scanoutpos+0x4b/0x320
PGD 0
Oops: 0000 [#1] SMP
Modules linked in:
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.18.0-rc6-4-default #2649
Hardware name: Supermicro X7DB8/X7DB8, BIOS 6.00 07/26/2006
task: ffff880234da2010 ti: ffff880234da4000 task.ti: ffff880234da4000
RIP: 0010:[<ffffffff8150423b>] [<ffffffff8150423b>] drm_calc_vbltimestamp_from_scanoutpos+0x4b/0x320
RSP: 0000:ffff880234da7918 EFLAGS: 00010086
RAX: ffffffff81557890 RBX: 0000000000000000 RCX: ffff880234da7a48
RDX: ffff880234da79f4 RSI: 0000000000000000 RDI: ffff880232e15000
RBP: ffff880234da79b8 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000000a R11: 0000000000000001 R12: ffff880232dda1c0
R13: ffff880232e1518c R14: 0000000000000292 R15: ffff880232e15000
FS: 0000000000000000(0000) GS:ffff88023fc40000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 000000000000025c CR3: 0000000002014000 CR4: 00000000000007e0
Stack:
ffff880234da79d8 0000000000000286 ffff880232dcbc00 0000000000002480
ffff880234da7958 0000000000000296 ffff880234da7998 ffffffff8151b51d
ffff880234da7a48 0000000032dcbeb0 ffff880232dcbc00 ffff880232dcbc58
Call Trace:
[<ffffffff8151b51d>] ? drm_vma_offset_remove+0x1d/0x110
[<ffffffff8152dc98>] radeon_get_vblank_timestamp_kms+0x38/0x60
[<ffffffff8152076a>] ? ttm_bo_release_list+0xba/0x180
[<ffffffff81503751>] drm_get_last_vbltimestamp+0x41/0x70
[<ffffffff81503933>] vblank_disable_and_save+0x73/0x1d0
[<ffffffff81106b2f>] ? try_to_del_timer_sync+0x4f/0x70
[<ffffffff81505245>] drm_vblank_cleanup+0x65/0xa0
[<ffffffff815604fa>] radeon_irq_kms_fini+0x1a/0x70
[<ffffffff8156c07e>] r100_init+0x26e/0x410
[<ffffffff8152ae3e>] radeon_device_init+0x7ae/0xb50
[<ffffffff8152d57f>] radeon_driver_load_kms+0x8f/0x210
[<ffffffff81506965>] drm_dev_register+0xb5/0x110
[<ffffffff8150998f>] drm_get_pci_dev+0x8f/0x200
[<ffffffff815291cd>] radeon_pci_probe+0xad/0xe0
[<ffffffff8141a365>] local_pci_probe+0x45/0xa0
[<ffffffff8141b741>] pci_device_probe+0xd1/0x130
[<ffffffff81633dad>] driver_probe_device+0x12d/0x3e0
[<ffffffff8163413b>] __driver_attach+0x9b/0xa0
[<ffffffff816340a0>] ? __device_attach+0x40/0x40
[<ffffffff81631cd3>] bus_for_each_dev+0x63/0xa0
[<ffffffff8163378e>] driver_attach+0x1e/0x20
[<ffffffff81633390>] bus_add_driver+0x180/0x240
[<ffffffff81634914>] driver_register+0x64/0xf0
[<ffffffff81419cac>] __pci_register_driver+0x4c/0x50
[<ffffffff81509bf5>] drm_pci_init+0xf5/0x120
[<ffffffff821dc871>] ? ttm_init+0x6a/0x6a
[<ffffffff821dc908>] radeon_init+0x97/0xb5
[<ffffffff810002fc>] do_one_initcall+0xbc/0x1f0
[<ffffffff810e3278>] ? __wake_up+0x48/0x60
[<ffffffff8218e256>] kernel_init_freeable+0x18a/0x215
[<ffffffff8218d983>] ? initcall_blacklist+0xc0/0xc0
[<ffffffff818a78f0>] ? rest_init+0x80/0x80
[<ffffffff818a78fe>] kernel_init+0xe/0xf0
[<ffffffff818c0c3c>] ret_from_fork+0x7c/0xb0
[<ffffffff818a78f0>] ? rest_init+0x80/0x80
Code: 45 ac 0f 88 a8 01 00 00 3b b7 d0 01 00 00 49 89 ff 0f 83 99 01 00 00 48 8b 47 20 48 8b 80 88 00 00 00 48 85 c0 0f 84 cd 01 00 00 <41> 8b b1 5c 02 00 00 41 8b 89 58 02 00 00 89 75 98 41 8b b1 60
RIP [<ffffffff8150423b>] drm_calc_vbltimestamp_from_scanoutpos+0x4b/0x320
RSP <ffff880234da7918>
CR2: 000000000000025c
---[ end trace ad2c0aadf48e2032 ]---
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009
It has helped me to add a NULL pointer check that was suggested at
http://lists.freedesktop.org/archives/dri-devel/2014-October/070663.html
I am not familiar with the code. But the change looks sane
and we need something fast at this stage of 3.18 development.
Suggested-by: Helge Deller <deller@gmx.de>
Signed-off-by: Petr Mladek <pmladek@suse.cz>
Tested-by: Petr Mladek <pmladek@suse.cz>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f0d7bfb9407fccb6499ec01c33afe43512a439a2 upstream.
Need to unlock the crtc after updating the blanking state.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 595d373f1e9c9ce0fc946457fdb488e8a58972cd upstream.
Fixes type/mask calculation being based on uninitialised data for VGA
outputs.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit b478e336b3e75505707a11e78ef8b964ef0a03af upstream.
The current error path calls tilcdc_unload() in case of an error to release
the resources. However, this is wrong because not all resources have been
allocated by the time an error occurs in tilcdc_load().
To fix it, this commit adds proper labels to bail out at the different
stages in the load function, and release only the resources actually allocated.
Tested-by: Darren Etheridge <detheridge@ti.com>
Tested-by: Johannes Pointner <johannes.pointner@br-automation.com>
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Fixes: 3a49012224ca ("drm/tilcdc: panel: fix leak when unloading the module")
Signed-off-by: Matwey V. Kornilov <matwey.kornilov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 1e99cfa8de0f0879091e33cd65fd60418d006ad9 upstream.
The translation from the X driver to the KMS one typo'ed a couple
of array indices, causing the HW cursor to look weird (blocky with
leaking edge colors). This fixes it.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 1952f24d0fa6292d65f886887af87ba8ac79b3ba upstream.
Vbios connector table lists non-existent VGA port.
Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=83184
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit f01ea0c3d9db536c64d47922716d8b3b8f21d850 upstream.
The code waiting for fifo idle was incorrect and could possibly spin
forever under certain circumstances.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reported-by: Mark Sheldon <markshel@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Reivewed-by: Mark Sheldon <markshel@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 83502a5d34386f7c6973bc70e1c423f55f5a2e3a upstream.
Type error and cause AST2000 cannot be detected correctly
Signed-off-by: Y.C. Chen <yc_chen@aspeedtech.com>
Reviewed-by: Egbert Eich <eich@suse.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 7a98948f3b536ca9a077e84966ddc0e9f53726df upstream.
The vblank waits in intel_tv_detect_type() are timing out for some
reason. This is a regression caused removing seemingly useless vblank
waits from the modeset seqeuence in:
commit 56ef52cad5e37fca89638e4bad598a994ecc3d9f
Author: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Thu May 8 19:23:15 2014 +0300
drm/i915: Kill vblank waits after pipe enable on gmch platforms
So it turns out they weren't all entirely useless. Apparently the pipe
has to go through one full frame before we enable the TV port. Add a
vblank wait to intel_enable_tv() to make sure that happens.
Another approach was attempted by placing the vblank wait just after
enabling the port. The theory behind that attempt was that we need to
let the port stay enabled for one full frame before disabling it again
during load detection. But that didn't work, and we definitely must
have the vblank wait before enabling the port.
Cc: Alan Bartlett <ajb@elrepo.org>
Tested-by: Alan Bartlett <ajb@elrepo.org>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=79311
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit bbe1c2740d3a25aa1dbe5d842d2ff09cddcdde0a upstream.
The __init annotations for the DMI callback functions are wrong as this
code can be called even after the module has been initialized, e.g. like
this:
# echo 1 > /sys/bus/pci/devices/0000:00:02.0/remove
# modprobe i915
# echo 1 > /sys/bus/pci/rescan
The first command will remove the PCI device from the kernel's device
list so the second command won't see it right away. But as it registers
a PCI driver it'll see it on the third command. If the system happens to
match one of the DMI table entries we'll try to call a function in long
released memory and generate an Oops, at best.
Fix this by removing the bogus annotation.
Modpost should have caught that one but it ignores section reference
mismatches from the .rodata section. :/
Fixes: 25e341cfc33d ("drm/i915: quirk away broken OpRegion VBT")
Fixes: 8ca4013d702d ("CHROMIUM: i915: Add DMI override to skip CRT...")
Fixes: 425d244c8670 ("drm/i915: ignore LVDS on intel graphics systems...")
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Duncan Laurie <dlaurie@chromium.org>
Cc: Jarod Wilson <jarod@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au> # Can modpost be fixed?
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit ece4a17d237a79f63fbfaf3f724a12b6d500555c upstream.
Withtout this, ring initialization fails reliabily during resume with
[drm:init_ring_common] *ERROR* render ring initialization failed ctl 0001f001 head ffffff8804 tail 00000000 start 000e4000
This is not a complete fix, but it is verified to make the ring
initialization failures during resume much less likely.
We were not able to root-cause this bug (likely HW-specific to Gen4 chips)
yet. This is therefore used as a ducttape before problem is fully
understood and proper fix created, so that people don't suffer from
completely unusable systems in the meantime.
The discussion and debugging is happening at
https://bugs.freedesktop.org/show_bug.cgi?id=76554
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 5dc355325b648dc9b4cf3bea4d968de46fd59215 upstream.
Looks like the lm63 driver supports the lm64 as well.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 46c2df68f03a236b30808bba361f10900c88d95e upstream.
We can use "unsigned int" instead of "atomic_t" by updating start_pool
variable under _manager->lock. This patch will make it possible to avoid
skipping when choosing a pool to shrink in round-robin style, after next
patch changes mutex_lock(_manager->lock) to !mutex_trylock(_manager->lork).
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 11e504cc705e8ccb06ac93a276e11b5e8fee4d40 upstream.
list_empty(&_manager->pools) being false before taking _manager->lock
does not guarantee that _manager->npools != 0 after taking _manager->lock
because _manager->npools is updated under _manager->lock.
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit c9a3ad25eddfdb898114a9d73cdb4c3472d9dfca upstream.
display_timings_release calls kfree on the display_timings object passed
to it. Calling kfree after it is wrong. SLUB debug showed the following
warning:
=============================================================================
BUG kmalloc-64 (Tainted: G W ): Object already free
-----------------------------------------------------------------------------
Disabling lock debugging due to kernel taint
INFO: Allocated in of_get_display_timings+0x2c/0x214 age=601 cpu=0
pid=884
__slab_alloc.constprop.79+0x2e0/0x33c
kmem_cache_alloc+0xac/0xdc
of_get_display_timings+0x2c/0x214
panel_probe+0x7c/0x314 [tilcdc]
platform_drv_probe+0x18/0x48
[..snip..]
INFO: Freed in panel_destroy+0x18/0x3c [tilcdc] age=0 cpu=0 pid=907
__slab_free+0x34/0x330
panel_destroy+0x18/0x3c [tilcdc]
tilcdc_unload+0xd0/0x118 [tilcdc]
drm_dev_unregister+0x24/0x98
[..snip..]
Signed-off-by: Guido Martínez <guido@vanguardiasur.com.ar>
Tested-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit eb565a2bbadc6a5030a6dbe58db1aa52453e7edf upstream.
Unregister resources in the correct order on tilcdc_drm_fini, which is
the reverse order they were registered during tilcdc_drm_init.
This also means unregistering the driver before releasing its resources.
Signed-off-by: Guido Martínez <guido@vanguardiasur.com.ar>
Tested-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 3a49012224ca9016658a831a327ff6a7fe5bb4f9 upstream.
The driver did not unregister the allocated framebuffer, which caused
memory leaks (and memory manager WARNs) when unloading. Also, the
framebuffer device under /dev still existed after unloading.
Add a call to drm_fbdev_cma_fini when unloading the module to prevent
both issues.
Signed-off-by: Guido Martínez <guido@vanguardiasur.com.ar>
Tested-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 16dcbdef404f4e87dab985494381939fe0a2d456 upstream.
Add a drm_sysfs_connector_remove call when we destroy the panel to make
sure the connector node in sysfs gets deleted.
This is required for proper unload and re-load of this driver, otherwise
we will get a warning about a duplicate filename in sysfs.
Signed-off-by: Guido Martínez <guido@vanguardiasur.com.ar>
Tested-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit daa15b4cd1eee58eb1322062a3320b1dbe5dc96e upstream.
Add a drm_sysfs_connector_remove call when we destroy the panel to make
sure the connector node in sysfs gets deleted.
This is required for proper unload and re-load of this driver as a
module. Without this, we would get a warning at re-load time like so:
tda998x 0-0070: found TDA19988
------------[ cut here ]------------
WARNING: CPU: 0 PID: 825 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x54/0x74()
sysfs: cannot create duplicate filename '/class/drm/card0-HDMI-A-1'
Modules linked in: [..]
CPU: 0 PID: 825 Comm: modprobe Not tainted 3.15.0-rc4-00027-g9dcdef4 #82
[<c0013bb8>] (unwind_backtrace) from [<c0011824>] (show_stack+0x10/0x14)
[<c0011824>] (show_stack) from [<c0034e8c>] (warn_slowpath_common+0x68/0x88)
[<c0034e8c>] (warn_slowpath_common) from [<c0034edc>] (warn_slowpath_fmt+0x30/0x40)
[<c0034edc>] (warn_slowpath_fmt) from [<c01243f4>] (sysfs_warn_dup+0x54/0x74)
[<c01243f4>] (sysfs_warn_dup) from [<c0124708>] (sysfs_do_create_link_sd.isra.2+0xb0/0xb8)
[<c0124708>] (sysfs_do_create_link_sd.isra.2) from [<c02ae37c>] (device_add+0x338/0x520)
[<c02ae37c>] (device_add) from [<c02ae6e8>] (device_create_groups_vargs+0xa0/0xc4)
[<c02ae6e8>] (device_create_groups_vargs) from [<c02ae758>] (device_create+0x24/0x2c)
[<c02ae758>] (device_create) from [<c029b4ec>] (drm_sysfs_connector_add+0x64/0x204)
[<c029b4ec>] (drm_sysfs_connector_add) from [<bf0b1b40>] (slave_modeset_init+0x120/0x1bc [tilcdc])
[<bf0b1b40>] (slave_modeset_init [tilcdc]) from [<bf0b2be8>] (tilcdc_load+0x214/0x4c0 [tilcdc])
[<bf0b2be8>] (tilcdc_load [tilcdc]) from [<c029955c>] (drm_dev_register+0xa4/0x104)
[..snip..]
---[ end trace 4df8d614936ebdee ]---
[drm:drm_sysfs_connector_add] *ERROR* failed to register connector device: -17
Signed-off-by: Guido Martínez <guido@vanguardiasur.com.ar>
Tested-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit e396900e649b0af31161634d87fe37076f46c12b upstream.
Add a drm_sysfs_connector_remove call when we destroy the panel to make
sure the connector node in sysfs gets deleted.
This is required for proper unload and re-load of this driver as a
module. Without this, we would get a warning at re-load time like so:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 824 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x54/0x74()
sysfs: cannot create duplicate filename '/class/drm/card0-LVDS-1'
Modules linked in: [...]
CPU: 0 PID: 824 Comm: modprobe Not tainted 3.15.0-rc4-00027-g6484f96-dirty #81
[<c0013bb8>] (unwind_backtrace) from [<c0011824>] (show_stack+0x10/0x14)
[<c0011824>] (show_stack) from [<c0034e8c>] (warn_slowpath_common+0x68/0x88)
[<c0034e8c>] (warn_slowpath_common) from [<c0034edc>] (warn_slowpath_fmt+0x30/0x40)
[<c0034edc>] (warn_slowpath_fmt) from [<c01243f4>] (sysfs_warn_dup+0x54/0x74)
[<c01243f4>] (sysfs_warn_dup) from [<c0124708>] (sysfs_do_create_link_sd.isra.2+0xb0/0xb8)
[<c0124708>] (sysfs_do_create_link_sd.isra.2) from [<c02ae37c>] (device_add+0x338/0x520)
[<c02ae37c>] (device_add) from [<c02ae6e8>] (device_create_groups_vargs+0xa0/0xc4)
[<c02ae6e8>] (device_create_groups_vargs) from [<c02ae758>] (device_create+0x24/0x2c)
[<c02ae758>] (device_create) from [<c029b4ec>] (drm_sysfs_connector_add+0x64/0x204)
[<c029b4ec>] (drm_sysfs_connector_add) from [<bf0b1fec>] (panel_modeset_init+0xb8/0x134 [tilcdc])
[<bf0b1fec>] (panel_modeset_init [tilcdc]) from [<bf0b2bf0>] (tilcdc_load+0x214/0x4c0 [tilcdc])
[<bf0b2bf0>] (tilcdc_load [tilcdc]) from [<c029955c>] (drm_dev_register+0xa4/0x104)
[ .. snip .. ]
---[ end trace b2d09cd9578b0497 ]---
[drm:drm_sysfs_connector_add] *ERROR* failed to register connector device: -17
Signed-off-by: Guido Martínez <guido@vanguardiasur.com.ar>
Tested-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 2d31ca3ad7d5d44c8adc7f253c96ce33f3a2e931 upstream.
Regular randconfig nightly testing has detected problems with omapdrm.
omapdrm fails to build when the kernel is built to support 64-bit DMA
addresses and/or 64-bit physical addresses due to an assumption about
the width of these types.
Use %pad to print DMA addresses, rather than %x or %Zx (which is even
more wrong than %x). Avoid passing a uint32_t pointer into a function
which expects dma_addr_t pointer.
drivers/gpu/drm/omapdrm/omap_plane.c: In function 'omap_plane_pre_apply':
drivers/gpu/drm/omapdrm/omap_plane.c:145:2: error: format '%x' expects argument of type 'unsigned int', but argument 5 has type 'dma_addr_t' [-Werror=format]
drivers/gpu/drm/omapdrm/omap_plane.c:145:2: error: format '%x' expects argument of type 'unsigned int', but argument 6 has type 'dma_addr_t' [-Werror=format]
make[5]: *** [drivers/gpu/drm/omapdrm/omap_plane.o] Error 1
drivers/gpu/drm/omapdrm/omap_gem.c: In function 'omap_gem_get_paddr':
drivers/gpu/drm/omapdrm/omap_gem.c:794:4: error: format '%x' expects argument of type 'unsigned int', but argument 3 has type 'dma_addr_t' [-Werror=format]
drivers/gpu/drm/omapdrm/omap_gem.c: In function 'omap_gem_describe':
drivers/gpu/drm/omapdrm/omap_gem.c:991:4: error: format '%Zx' expects argument of type 'size_t', but argument 7 has type 'dma_addr_t' [-Werror=format]
drivers/gpu/drm/omapdrm/omap_gem.c: In function 'omap_gem_init':
drivers/gpu/drm/omapdrm/omap_gem.c:1470:4: error: format '%x' expects argument of type 'unsigned int', but argument 7 has type 'dma_addr_t' [-Werror=format]
make[5]: *** [drivers/gpu/drm/omapdrm/omap_gem.o] Error 1
drivers/gpu/drm/omapdrm/omap_dmm_tiler.c: In function 'dmm_txn_append':
drivers/gpu/drm/omapdrm/omap_dmm_tiler.c:226:2: error: passing argument 3 of 'alloc_dma' from incompatible pointer type [-Werror]
make[5]: *** [drivers/gpu/drm/omapdrm/omap_dmm_tiler.o] Error 1
make[5]: Target `__build' not remade because of errors.
make[4]: *** [drivers/gpu/drm/omapdrm] Error 2
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 0ac66effe7fcdee55bda6d5d10d3372c95a41920 upstream.
In some cases we fetch the edid in the detect() callback
in order to determine what sort of monitor is connected.
If that happens, don't fetch the edid again in the get_modes()
callback or we will leak the edid.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit fbb60fe35ad579b511de8604b06a30b43846473b upstream.
Return IRQ_NONE if it was not our irq. This is necessary for the case
when qxl is sharing irq line with a device A in a crash kernel. If qxl
is initialized before A and A's irq was raised during this gap,
returning IRQ_HANDLED in this case will cause this irq to be raised
again after EOI since kernel think it was handled but in fact it was
not.
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 201bb62402e0227375c655446ea04fcd0acf7287 upstream.
If the value in the scratch register is 0, set it to the
max level. This fixes an issue where the console fb blanking
code calls back into the backlight driver on unblank and then
sets the backlight level to 0 after the driver has already
set the mode and enabled the backlight.
bugs:
https://bugs.freedesktop.org/show_bug.cgi?id=81382
https://bugs.freedesktop.org/show_bug.cgi?id=70207
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 0986c1a55ca64b44ee126a2f719a6e9f28cbe0ed upstream.
When we set the valid bit on invalid GART entries they are
loaded into the TLB when an adjacent entry is loaded. This
poisons the TLB with invalid entries which are sometimes
not correctly removed on TLB flush.
For stable inclusion the patch probably needs to be modified a bit.
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 6abafb78f9881b4891baf74ab4e9f090ae45230e upstream.
Fixes hangs on driver load on some cards.
bug:
https://bugs.freedesktop.org/show_bug.cgi?id=76998
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 4e578080ed3262ed2c3985868539bc66218d25c0 upstream.
Commit "drm/vmwgfx: correct fb_fix_screeninfo.line_length", while fixing a
vmwgfx fbdev bug, also writes the pitch to a supposedly read-only register:
SVGA_REG_BYTES_PER_LINE, while it should be (and also in fact is) written to
SVGA_REG_PITCHLOCK.
This patch is Cc'd stable because of the unknown effects writing to this
register might have, particularly on older device versions.
v2: Updated log message.
Cc: Christopher Friedt <chrisfriedt@gmail.com>
Tested-by: Christopher Friedt <chrisfriedt@gmail.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit ec65da385d46f63740c1c9230b891a6dcbd64c71 upstream.
It hangs the hardware.
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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