[Bug 94211] New: [pnv atomic] GPU hang deadlock

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94211

            Bug ID: 94211
           Summary: [pnv atomic] GPU hang deadlock
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: chris at chris-wilson.co.uk
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

[ 1200.320145] INFO: task kworker/1:1:25 blocked for more than 120 seconds.
[ 1200.320161]       Tainted: G           OE   4.5.0-rc4+ #340
[ 1200.320167] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 1200.320173] kworker/1:1     D f6e4dd10     0    25      2 0x00000000
[ 1200.320195] Workqueue: events i915_hangcheck_elapsed
[ 1200.320201]  f6e4dd30 00000046 f6d8e944 f6e4dd10 c1528c6d f624b000 00000001
f5c86380
[ 1200.320213]  f6207800 f60fb340 f6dead00 f6e4e000 f6dead00 f6e4ddb8 f6e4dd3c
c1528c6d
[ 1200.320224]  f6d8e944 f6e4dd44 c1528ead f6e4dd6c c1529e13 f6d8e94c f6d8e948
f6d8e94c
[ 1200.320235] Call Trace:
[ 1200.320247]  [<c1528c6d>] ? schedule+0x2d/0x80
[ 1200.320253]  [<c1528c6d>] schedule+0x2d/0x80
[ 1200.320260]  [<c1528ead>] schedule_preempt_disabled+0xd/0x10
[ 1200.320266]  [<c1529e13>] __ww_mutex_lock_slowpath+0x78/0x125
[ 1200.320273]  [<c1529f04>] __ww_mutex_lock+0x44/0x6c
[ 1200.320279]  [<c1312a91>] drm_modeset_lock+0x31/0xf0
[ 1200.320284]  [<c1312b70>] drm_modeset_lock_all_ctx+0x20/0xc0
[ 1200.320293]  [<c12f374f>] drm_atomic_helper_suspend+0x2f/0x90
[ 1200.320301]  [<c138df95>] intel_display_suspend+0x15/0x50
[ 1200.320307]  [<c1312e52>] ? drm_modeset_lock_all+0x72/0xb0
[ 1200.320313]  [<c138e005>] intel_prepare_reset+0x35/0x40
[ 1200.320320]  [<c132028d>] i915_handle_error+0x24d/0x710
[ 1200.320328]  [<c106bae2>] ? dequeue_entity+0x3a2/0xc90
[ 1200.320356]  [<c1062e58>] ? ttwu_do_wakeup+0x18/0x100
[ 1200.320369]  [<c1320a44>] i915_hangcheck_elapsed+0x2f4/0x450
[ 1200.320381]  [<c10551b4>] process_one_work+0x114/0x370
[ 1200.320390]  [<c1055524>] worker_thread+0x114/0x450
[ 1200.320399]  [<c1055410>] ? process_one_work+0x370/0x370
[ 1200.320407]  [<c1059a3c>] kthread+0x9c/0xb0
[ 1200.320420]  [<c152ba09>] ret_from_kernel_thread+0x21/0x38
[ 1200.320428]  [<c10599a0>] ? kthread_park+0x50/0x50

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