igt@i915_selftest@live_coherency - incomplete - GEM_BUG_ON(!ctx.engine)
<0> [465.730769] i915_sel-4754 2.... 463077169us : __i915_subtests: Running i915_gem_coherency_live_selftests/igt_gem_coherency
<0> [465.730831] i915_sel-4754 2.... 463077183us : igt_gem_coherency: igt_gem_coherency:328 GEM_BUG_ON(!ctx.engine)
<0> [465.730835] ---------------------------------
<4> [465.731346] ------------[ cut here ]------------
<2> [465.731350] kernel BUG at drivers/gpu/drm/i915/gem/selftests/i915_gem_coherency.c:328!
<4> [465.731360] invalid opcode: 0000 [#1] PREEMPT SMP PTI
<4> [465.731361] irq event stamp: 75232743
<4> [465.731366] hardirqs last enabled at (75232743): [<ffffffff81247f4d>] __slab_alloc.isra.83.constprop.88+0x4d/0x70
<4> [465.731368] hardirqs last disabled at (75232742): [<ffffffff81247f19>] __slab_alloc.isra.83.constprop.88+0x19/0x70
<4> [465.731372] softirqs last enabled at (75232390): [<ffffffff81e00385>] __do_softirq+0x385/0x47f
<4> [465.731376] softirqs last disabled at (75232379): [<ffffffff810b93ea>] irq_exit+0xba/0xc0
<4> [465.731382] CPU: 2 PID: 4754 Comm: i915_selftest Tainted: G U W 5.5.0-rc3-CI-CI_DRM_7640+ #1
<4> [465.731387] Hardware name: Dell Inc. XPS 13 9350/, BIOS 1.4.12 11/30/2016
<4> [465.731458] RIP: 0010:igt_gem_coherency+0x1b1/0x620 [i915]
<4> [465.731464] Code: 00 48 c7 c2 a0 80 c5 a0 48 c7 c7 2d 6f b2 a0 e8 55 8a 67 e0 bf 01 00 00 00 e8 6b 5c 67 e0 31 f6 bf 09 00 00 00 e8 7f 9b 58 e0 <0f> 0b 89 c6 8d 50 08 8d 48 10 83 e8 80 e9 9a fe ff ff 48 8d 50 18
<4> [465.731468] RSP: 0018:ffffc900005739d0 EFLAGS: 00010296
<4> [465.731474] RAX: ffff88826f3a5140 RBX: 0000000000000000 RCX: 0000000000000000
<4> [465.731479] RDX: 0000000000000006 RSI: 0000000000000000 RDI: 0000000000000009
<4> [465.731483] RBP: ffff88826f19d000 R08: 0000000000000000 R09: 0000000000000000
<4> [465.731485] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888262318540
<4> [465.731487] R13: ffff88826d434d78 R14: ffff888262310000 R15: 0000000000000000
<4> [465.731489] FS: 00007f077bceae40(0000) GS:ffff888275d00000(0000) knlGS:0000000000000000
<4> [465.731492] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [465.731494] CR2: 0000557e25fee948 CR3: 00000002551a6004 CR4: 00000000003606e0
<4> [465.731496] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
<4> [465.731498] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
<4> [465.731500] Call Trace:
<4> [465.731576] __i915_subtests+0xb8/0x210 [i915]
<4> [465.731650] ? i915_perf_selftests+0x60/0x60 [i915]
<4> [465.731720] ? __i915_nop_setup+0x10/0x10 [i915]
<4> [465.731789] __run_selftests+0x112/0x170 [i915]
<4> [465.731857] i915_live_selftests+0x2c/0x60 [i915]
<4> [465.731915] i915_pci_probe+0x93/0x1c0 [i915]
<4> [465.731922] ? _raw_spin_unlock_irqrestore+0x34/0x60
<4> [465.731928] pci_device_probe+0x9e/0x120
<4> [465.731935] really_probe+0xea/0x420
<4> [465.731941] driver_probe_device+0x10b/0x120
<4> [465.731947] device_driver_attach+0x4a/0x50
<4> [465.731952] __driver_attach+0x97/0x130
<4> [465.731958] ? device_driver_attach+0x50/0x50
<4> [465.731963] bus_for_each_dev+0x74/0xc0
<4> [465.731969] bus_add_driver+0x142/0x220
<4> [465.731975] driver_register+0x56/0xf0
<4> [465.732030] i915_init+0x6c/0x7c [i915]
<4> [465.732034] ? 0xffffffffa0246000
<4> [465.732037] do_one_initcall+0x58/0x300
<4> [465.732041] ? rcu_read_lock_sched_held+0x4d/0x80
<4> [465.732044] ? kmem_cache_alloc_trace+0x290/0x2c0
<4> [465.732050] do_init_module+0x56/0x1f2
<4> [465.732056] load_module+0x243e/0x29f0
<4> [465.732066] ? __do_sys_finit_module+0xe9/0x110
<4> [465.732069] __do_sys_finit_module+0xe9/0x110
<4> [465.732075] do_syscall_64+0x4f/0x220
<4> [465.732077] entry_SYSCALL_64_after_hwframe+0x49/0xbe
<4> [465.732079] RIP: 0033:0x7f077b397839
<4> [465.732082] Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 1f f6 2c 00 f7 d8 64 89 01 48
<4> [465.732085] RSP: 002b:00007ffceda5bc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
<4> [465.732087] RAX: ffffffffffffffda RBX: 00005640f73aaec0 RCX: 00007f077b397839
<4> [465.732089] RDX: 0000000000000000 RSI: 00005640f73a4180 RDI: 0000000000000006
<4> [465.732091] RBP: 00005640f73a4180 R08: 0000000000000004 R09: 00005640f73ac8b0
<4> [465.732093] R10: 00007ffceda5bdb0 R11: 0000000000000246 R12: 0000000000000000
<4> [465.732094] R13: 00005640f739bc00 R14: 0000000000000020 R15: 0000000000000048
<4> [465.732099] Modules linked in: i915(+) amdgpu gpu_sched ttm vgem snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic mei_hdcp x86_pkg_temp_thermal coretemp snd_intel_dspcfg crct10dif_pclmul snd_hda_codec crc32_pclmul snd_hwdep snd_hda_core snd_pcm ghash_clmulni_intel asix usbnet mii mei_me mei prime_numbers intel_lpss_pci i2c_hid pinctrl_sunrisepoint pinctrl_intel btusb btrtl btbcm btintel bluetooth ecdh_generic ecc [last unloaded: i915]
<4> [465.732125] ---[ end trace 1faca6ac684a70ec ]---
````