[Bug 111249] New: [CI][BAT] igt at i915_selftest@* / reload tests - dmesg-warn - DEBUG_LOCKS_WARN_ON(lock->magic != lock)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111249

            Bug ID: 111249
           Summary: [CI][BAT] igt at i915_selftest@* / reload tests -
                    dmesg-warn - DEBUG_LOCKS_WARN_ON(lock->magic != lock)
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: martin.peres at free.fr
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_6571/fi-byt-clapper/igt@i915_module_load@reload-with-fault-injection.html

<4> [318.260827] ------------[ cut here ]------------
<4> [318.260849] DEBUG_LOCKS_WARN_ON(lock->magic != lock)
<4> [318.260864] WARNING: CPU: 1 PID: 2112 at kernel/locking/mutex.c:912
__mutex_lock+0x750/0x9b0
<4> [318.260899] Modules linked in: i915(-) snd_hda_codec snd_hwdep
snd_hda_core snd_pcm vgem coretemp crct10dif_pclmul crc32_pclmul
ghash_clmulni_intel cdc_ether lpc_ich usbnet r8152 mii i2c_designware_pci
prime_numbers btusb btrtl btbcm btintel bluetooth ecdh_generic ecc [last
unloaded: i915]
<4> [318.260976] CPU: 1 PID: 2112 Comm: kworker/u4:13 Tainted: G     U         
  5.3.0-rc2-CI-CI_DRM_6571+ #1
<4> [318.261000] Hardware name: GOOGLE Clapper/Clapper, BIOS MrChromebox
02/04/2018
<4> [318.261134] Workqueue: i915 __i915_vm_release [i915]
<4> [318.261156] RIP: 0010:__mutex_lock+0x750/0x9b0
<4> [318.261170] Code: c0 0f 84 3a f9 ff ff 44 8b 05 8c a6 97 00 45 85 c0 0f 85
2a f9 ff ff 48 c7 c6 79 43 09 82 48 c7 c7 08 1e 08 82 e8 80 62 6e ff <0f> 0b e9
10 f9 ff ff f6 c2 04 0f 84 f3 fa ff ff 48 89 d1 83 e1 03
<4> [318.261212] RSP: 0018:ffffc9000037fcf0 EFLAGS: 00010282
<4> [318.261228] RAX: 0000000000000000 RBX: 0000000000000000 RCX:
0000000000000001
<4> [318.261247] RDX: 0000000080000001 RSI: 0000000000000000 RDI:
ffffffff8112dd4c
<4> [318.261265] RBP: ffffc9000037fda0 R08: 0000000000000000 R09:
00000000000397c0
<4> [318.261283] R10: ffffc9000037fdb8 R11: 0000000000000840 R12:
0000000000000000
<4> [318.261302] R13: ffff88806340b0b0 R14: 0000000000000002 R15:
ffff88804d2a9288
<4> [318.261320] FS:  0000000000000000(0000) GS:ffff888077900000(0000)
knlGS:0000000000000000
<4> [318.261341] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [318.261357] CR2: 000055ca541533a8 CR3: 0000000074b4e000 CR4:
00000000001006e0
<4> [318.261375] Call Trace:
<4> [318.261389]  ? __mutex_lock+0x9d/0x9b0
<4> [318.261403]  ? __mutex_lock+0x44a/0x9b0
<4> [318.261506]  ? i915_vma_destroy+0x86/0x350 [i915]
<4> [318.261521]  ? __mutex_lock+0x44a/0x9b0
<4> [318.261626]  ? i915_vma_destroy+0x86/0x350 [i915]
<4> [318.261725]  i915_vma_destroy+0x86/0x350 [i915]
<4> [318.261826]  gen6_ppgtt_cleanup+0x40/0xf0 [i915]
<4> [318.261927]  __i915_vm_release+0xfc/0x1d0 [i915]
<4> [318.261949]  process_one_work+0x245/0x610
<4> [318.261968]  worker_thread+0x37/0x380
<4> [318.261984]  ? process_one_work+0x610/0x610
<4> [318.261998]  kthread+0x119/0x130
<4> [318.262011]  ? kthread_park+0xa0/0xa0
<4> [318.262027]  ret_from_fork+0x3a/0x50
<4> [318.262047] irq event stamp: 69029
<4> [318.262061] hardirqs last  enabled at (69029): [<ffffffff819cece4>]
_raw_spin_unlock_irq+0x24/0x50
<4> [318.262085] hardirqs last disabled at (69028): [<ffffffff819ceb6a>]
_raw_spin_lock_irq+0xa/0x40
<4> [318.262108] softirqs last  enabled at (68976): [<ffffffff81c0033e>]
__do_softirq+0x33e/0x4ae
<4> [318.262131] softirqs last disabled at (68967): [<ffffffff810b80b9>]
irq_exit+0xa9/0xc0
<4> [318.262153] WARNING: CPU: 1 PID: 2112 at kernel/locking/mutex.c:912
__mutex_lock+0x750/0x9b0
<4> [318.262175] ---[ end trace dd3174496a951280 ]---
<7> [318.263642] i915 Wakeref last acquired:
   track_intel_runtime_pm_wakeref+0x14/0x90 [i915]
   intel_display_power_get+0x1f/0x60 [i915]
   intel_power_domains_init_hw+0xd3/0x570 [i915]
   i915_driver_probe+0xdfc/0x1950 [i915]
   i915_pci_probe+0x3f/0x1a0 [i915]
   pci_device_probe+0x9e/0x120
   really_probe+0xea/0x3d0
   driver_probe_device+0x10b/0x120
<7> [318.263740] i915 Wakeref count: 1
<7> [318.264304] i915 Wakeref x1 taken at:
   track_intel_runtime_pm_wakeref+0x14/0x90 [i915]
   intel_display_power_get+0x1f/0x60 [i915]
   edp_panel_vdd_on+0xd5/0x210 [i915]
   intel_dp_aux_xfer+0xeb/0x920 [i915]
   intel_dp_aux_transfer+0xa7/0x200 [i915]
   drm_dp_dpcd_access+0x76/0x110
   drm_dp_dpcd_read+0x29/0xc0
   intel_dp_read_dpcd+0x38/0x120 [i915]
<5> [318.801647] Setting dangerous option inject_load_failure - tainting kernel

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