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Chris Wilson c998e8a0f4 drm/i915: Hold rpm during GEM suspend in driver unload/suspend
i915_gem_suspend() tries to access the device to ensure it is idle and
all writes from the device are flushed to memory. It assumed is already
held the runtime pm wakeref, but we should explicitly acquire it for our
access to be safe.

[  619.926287] WARNING: CPU: 3 PID: 9353 at drivers/gpu/drm/i915/intel_drv.h:1750 gen6_write32+0x23e/0x2a0 [i915]
[  619.926300] RPM wakelock ref not held during HW access
[  619.926311] Modules linked in: vgem x86_pkg_temp_thermal intel_powerclamp snd_hda_codec_hdmi snd_hda_codec_generic snd_hda_codec coretemp snd_hwdep crct10dif_pclmul snd_hda_core crc32_pclmul snd_pcm mei_me mei lpc_ich ghash_clmulni_intel i915(-) sdhci_pci sdhci mmc_core e1000e ptp pps_core prime_numbers [last unloaded: snd_hda_intel]
[  619.926578] CPU: 3 PID: 9353 Comm: drv_module_relo Tainted: G     U          4.10.0-CI-Trybot_609+ #1
[  619.926585] Hardware name: LENOVO 42962WU/42962WU, BIOS 8DET56WW (1.26 ) 12/01/2011
[  619.926592] Call Trace:
[  619.926609]  dump_stack+0x67/0x92
[  619.926625]  __warn+0xc6/0xe0
[  619.926640]  warn_slowpath_fmt+0x4a/0x50
[  619.926726]  gen6_write32+0x23e/0x2a0 [i915]
[  619.926801]  gen6_mm_switch+0x38/0x70 [i915]
[  619.926871]  i915_switch_context+0xec/0xa10 [i915]
[  619.926942]  i915_gem_switch_to_kernel_context+0x13c/0x2b0 [i915]
[  619.927019]  i915_gem_suspend+0x2b/0x180 [i915]
[  619.927079]  i915_driver_unload+0x22/0x200 [i915]
[  619.927093]  ? __this_cpu_preempt_check+0x13/0x20
[  619.927105]  ? trace_hardirqs_on_caller+0xe7/0x200
[  619.927118]  ? trace_hardirqs_on+0xd/0x10
[  619.927128]  ? _raw_spin_unlock_irqrestore+0x3d/0x60
[  619.927192]  i915_pci_remove+0x14/0x20 [i915]
[  619.927205]  pci_device_remove+0x34/0xb0
[  619.927219]  device_release_driver_internal+0x158/0x210
[  619.927234]  driver_detach+0x3b/0x80
[  619.927245]  bus_remove_driver+0x53/0xd0
[  619.927256]  driver_unregister+0x27/0x50
[  619.927267]  pci_unregister_driver+0x25/0xa0
[  619.927351]  i915_exit+0x1a/0xb1a [i915]
[  619.927362]  SyS_delete_module+0x193/0x1e0
[  619.927378]  entry_SYSCALL_64_fastpath+0x1c/0xb1
[  619.927386] RIP: 0033:0x7f82b46c5d37
[  619.927393] RSP: 002b:00007ffdb6f610d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000b0
[  619.927408] RAX: ffffffffffffffda RBX: ffffffff81481ff3 RCX: 00007f82b46c5d37
[  619.927415] RDX: 0000000000000001 RSI: 0000000000000800 RDI: 000000000224f558
[  619.927422] RBP: ffffc90001187f88 R08: 0000000000000000 R09: 00007ffdb6f61100
[  619.927428] R10: 000000000224f4e0 R11: 0000000000000246 R12: 0000000000000000
[  619.927435] R13: 00007ffdb6f612b0 R14: 0000000000000000 R15: 0000000000000000
[  619.927451]  ? __this_cpu_preempt_check+0x13/0x20

or

[  641.646590] WARNING: CPU: 1 PID: 8913 at drivers/gpu/drm/i915/intel_drv.h:1750 intel_runtime_pm_get_noresume+0x8b/0x90 [i915]
[  641.646595] RPM wakelock ref not held during HW access
[  641.646600] Modules linked in: vgem snd_hda_codec_hdmi snd_hda_codec_generic x86_pkg_temp_thermal intel_powerclamp coretemp snd_hda_codec snd_hwdep crct10dif_pclmul snd_hda_core crc32_pclmul ghash_clmulni_intel snd_pcm mei_me mei i915(-) r8169 mii prime_numbers i2c_hid [last unloaded: snd_hda_intel]
[  641.646825] CPU: 1 PID: 8913 Comm: drv_module_relo Tainted: G     U          4.10.0-CI-Trybot_609+ #1
[  641.646836] Hardware name: TOSHIBA SATELLITE P50-C/06F4                            , BIOS 1.20 10/08/2015
[  641.646843] Call Trace:
[  641.646857]  dump_stack+0x67/0x92
[  641.646869]  __warn+0xc6/0xe0
[  641.646880]  warn_slowpath_fmt+0x4a/0x50
[  641.646893]  ? __this_cpu_preempt_check+0x13/0x20
[  641.646904]  ? trace_hardirqs_on_caller+0xe7/0x200
[  641.646957]  intel_runtime_pm_get_noresume+0x8b/0x90 [i915]
[  641.647022]  __i915_add_request+0x423/0x540 [i915]
[  641.647080]  i915_gem_switch_to_kernel_context+0x148/0x2b0 [i915]
[  641.647145]  i915_gem_suspend+0x2b/0x180 [i915]
[  641.647189]  i915_driver_unload+0x22/0x200 [i915]
[  641.647200]  ? __this_cpu_preempt_check+0x13/0x20
[  641.647210]  ? trace_hardirqs_on_caller+0xe7/0x200
[  641.647220]  ? trace_hardirqs_on+0xd/0x10
[  641.647231]  ? _raw_spin_unlock_irqrestore+0x3d/0x60
[  641.647276]  i915_pci_remove+0x14/0x20 [i915]
[  641.647293]  pci_device_remove+0x34/0xb0
[  641.647307]  device_release_driver_internal+0x158/0x210
[  641.647321]  driver_detach+0x3b/0x80
[  641.647330]  bus_remove_driver+0x53/0xd0
[  641.647338]  driver_unregister+0x27/0x50
[  641.647348]  pci_unregister_driver+0x25/0xa0
[  641.647415]  i915_exit+0x1a/0xb1a [i915]
[  641.647429]  SyS_delete_module+0x193/0x1e0
[  641.647444]  entry_SYSCALL_64_fastpath+0x1c/0xb1
[  641.647453] RIP: 0033:0x7fc622bd2d37
[  641.647463] RSP: 002b:00007ffff8ffb5c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000b0
[  641.647475] RAX: ffffffffffffffda RBX: ffffffff81481ff3 RCX: 00007fc622bd2d37
[  641.647480] RDX: 0000000000000001 RSI: 0000000000000800 RDI: 0000000000d49118
[  641.647485] RBP: ffffc90000997f88 R08: 0000000000000000 R09: 00007ffff8ffb5f0
[  641.647491] R10: 0000000000d490a0 R11: 0000000000000246 R12: 0000000000000000
[  641.647498] R13: 00007ffff8ffb7a0 R14: 0000000000000000 R15: 0000000000000000
[  641.647510]  ? __this_cpu_preempt_check+0x13/0x20

v2: Keep holding rpm until the end to cover i915_gem_sanitize() as well.

Fixes: 5ab57c7020 ("drm/i915: Flush logical context image out to memory upon suspend")
Fixes: 1c777c5d1d ("drm/i915/hsw: Fix GPU hang during resume from S3-devices state")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/20170302083029.19576-1-chris@chris-wilson.co.uk
Reviewed-by: Imre Deak <imre.deak@intel.com>
Cc: <stable@vger.kernel.org> # v4.9+
2017-03-02 12:44:08 +00:00
arch Merge airlied/drm-next into drm-misc-next 2017-02-27 09:30:11 +01:00
block
certs
crypto
Documentation Merge airlied/drm-next into drm-misc-next 2017-02-27 09:30:11 +01:00
drivers drm/i915: Hold rpm during GEM suspend in driver unload/suspend 2017-03-02 12:44:08 +00:00
firmware
fs Merge branch 'for-linus-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs 2017-02-11 09:15:58 -08:00
include drm/i915/skl: Add missing SKL ID 2017-02-27 13:38:07 +02:00
init
ipc
kernel Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2017-02-11 10:24:16 -08:00
lib lib/Kconfig: make PRIME_NUMBERS not user selectable. 2017-02-24 12:11:21 +10:00
mm mm/slub.c: fix random_seq offset destruction 2017-02-08 15:41:43 -08:00
net l2tp: do not use udp_ioctl() 2017-02-10 15:57:34 -05:00
samples
scripts
security
sound Linux 4.10-rc8 2017-02-23 12:10:12 +10:00
tools Merge airlied/drm-next into drm-misc-next 2017-02-27 09:30:11 +01:00
usr
virt
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Linux 4.10-rc8 2017-02-23 12:10:12 +10:00
Makefile Linux 4.10-rc8 2017-02-12 13:03:20 -08:00
README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.