igt@i915_selftest@mock - fail - WARN_ON(__i915_vma_unbind(vma))

https://intel-gfx-ci.01.org/tree/drm-tip/IGT_5507/shard-hsw7/igt@i915_selftest@mock.html

<4> [42.067397] WARN_ON(__i915_vma_unbind(vma))
<4> [42.067462] WARNING: CPU: 6 PID: 1297 at drivers/gpu/drm/i915/gt/intel_ggtt.c:675 i915_ggtt_driver_release+0x17b/0x1f0 [i915]
<4> [42.067463] Modules linked in: vgem snd_hda_codec_hdmi i915(-) x86_pkg_temp_thermal mei_hdcp coretemp crct10dif_pclmul snd_hda_codec_realtek snd_hda_codec_generic crc32_pclmul snd_intel_dspcfg ghash_clmulni_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm r8169 lpc_ich mei_me realtek mei prime_numbers [last unloaded: snd_hda_intel]
<4> [42.067473] CPU: 6 PID: 1297 Comm: i915_selftest Tainted: G     U            5.6.0-rc5-CI-CI_DRM_8132+ #1
<4> [42.067474] Hardware name: MSI MS-7924/Z97M-G43(MS-7924), BIOS V1.12 02/15/2016
<4> [42.067502] RIP: 0010:i915_ggtt_driver_release+0x17b/0x1f0 [i915]
<4> [42.067504] Code: cb 3a b2 e0 0f b6 b5 50 a3 00 00 40 84 f6 75 21 5b 5d 41 5c 41 5d 41 5e 41 5f c3 4c 89 fe 48 c7 c7 de 8e 72 a0 e8 95 14 b8 e0 <0f> 0b e9 44 ff ff ff 48 8d 9d 50 a3 00 00 48 8d bd 58 a3 00 00 e8
<4> [42.067505] RSP: 0018:ffffc90000aa7df8 EFLAGS: 00010282
<4> [42.067507] RAX: 0000000000000000 RBX: ffff8883f6f192d8 RCX: 0000000000000006
<4> [42.067508] RDX: 000000000000168a RSI: ffff8883ebd058f8 RDI: ffffffff823797b5
<4> [42.067509] RBP: ffff8883f6f10000 R08: ffff8883ebd058f8 R09: 0000000000000000
<4> [42.067510] R10: ffffc90000aa7d58 R11: 0000000000000000 R12: ffff8883f6f19600
<4> [42.067511] R13: ffff8883f6f19390 R14: ffff8883f6f19518 R15: ffffffffa06e8318
<4> [42.067513] FS:  00007fe28147ee40(0000) GS:ffff888410300000(0000) knlGS:0000000000000000
<4> [42.067514] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [42.067515] CR2: 0000564b71664280 CR3: 00000003fb5b2004 CR4: 00000000001606e0
<4> [42.067516] Call Trace:
<4> [42.067541]  i915_driver_release+0x2c/0x90 [i915]
<4> [42.067545]  pci_device_remove+0x36/0xb0
<4> [42.067549]  device_release_driver_internal+0xe0/0x1c0
<4> [42.067552]  driver_detach+0x42/0x80
<4> [42.067554]  bus_remove_driver+0x56/0xd0
<4> [42.067556]  pci_unregister_driver+0x25/0xa0
<4> [42.067595]  i915_exit+0x1b/0x21 [i915]
<4> [42.067598]  __x64_sys_delete_module+0x115/0x1e0
<4> [42.067601]  ? trace_hardirqs_off_thunk+0x1a/0x1c
<4> [42.067603]  ? do_syscall_64+0xd/0x220
<4> [42.067605]  do_syscall_64+0x4f/0x220
<4> [42.067609]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [42.067610] RIP: 0033:0x7fe280b2a1b7
<4> [42.067612] Code: 73 01 c3 48 8b 0d d1 8c 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 b0 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 8c 2c 00 f7 d8 64 89 01 48
<4> [42.067613] RSP: 002b:00007ffe133912f8 EFLAGS: 00000206 ORIG_RAX: 00000000000000b0
<4> [42.067614] RAX: ffffffffffffffda RBX: 00007ffe133913f0 RCX: 00007fe280b2a1b7
<4> [42.067616] RDX: 0000000000000004 RSI: 0000000000000800 RDI: 0000556db2b7fde8
<4> [42.067617] RBP: 0000556db2b7fd80 R08: 00007ffe133902f4 R09: 00007ffe13391320
<4> [42.067618] R10: 00007ffe133902f4 R11: 0000000000000206 R12: 0000000000000000
<4> [42.067619] R13: 00007ffe13391a60 R14: 0000000000000000 R15: 0000000000000000
<4> [42.067625] irq event stamp: 134374
<4> [42.067628] hardirqs last  enabled at (134373): [<ffffffff811308bc>] vprintk_emit+0xcc/0x330
<4> [42.067630] hardirqs last disabled at (134374): [<ffffffff81001d50>] trace_hardirqs_off_thunk+0x1a/0x1c
<4> [42.067632] softirqs last  enabled at (133788): [<ffffffff81e00385>] __do_softirq+0x385/0x47f
<4> [42.067635] softirqs last disabled at (133777): [<ffffffff810bab7a>] irq_exit+0xba/0xc0
<4> [42.067636] ---[ end trace 539a35c61f752871 ]---