igt@i915_selftest@live@gt_lrc - dmesg-fail - Unclaimed write to register 0x20a8
<4> [364.430091] i915 0000:00:02.0: Unclaimed write to register 0x20a8
<4> [364.430149] WARNING: CPU: 1 PID: 5574 at drivers/gpu/drm/i915/intel_uncore.c:1255 __unclaimed_reg_debug+0x69/0x80 [i915]
<4> [364.430521] Modules linked in: i915(+) vgem btusb snd_hda_codec_hdmi btrtl btbcm btintel snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio bluetooth coretemp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel ecdh_generic ecc r8169 realtek lpc_ich snd_intel_dspcfg snd_hda_codec snd_hwdep snd_hda_core snd_pcm pinctrl_cherryview prime_numbers [last unloaded: i915]
<4> [364.430762] CPU: 1 PID: 5574 Comm: i915_selftest Tainted: G U 5.11.0-rc4-CI-Patchwork_19447+ #1
<4> [364.430775] Hardware name: /NUC5CPYB, BIOS PYBSWCEL.86A.0058.2016.1102.1842 11/02/2016
<4> [364.430784] RIP: 0010:__unclaimed_reg_debug+0x69/0x80 [i915]
<4> [364.431093] Code: 48 8b 78 08 4c 8b 67 50 4d 85 e4 74 2c e8 df ca 0a e1 45 89 e8 48 89 e9 4c 89 e2 48 89 c6 48 c7 c7 d0 6a 85 a0 e8 88 83 3f e1 <0f> 0b 48 8b 43 08 83 a8 88 0d 00 00 01 eb a7 4c 8b 27 eb cf 0f 1f
<4> [364.431105] RSP: 0018:ffffc900000c4eb0 EFLAGS: 00010082
<4> [364.431122] RAX: 0000000000000000 RBX: ffff888110440ef8 RCX: 0000000000010006
<4> [364.431132] RDX: 0000000080010006 RSI: ffffffff8235a897 RDI: 00000000ffffffff
<4> [364.431142] RBP: ffffffffa08a4cbb R08: ffff888104c2da68 R09: 00000000fffffffe
<4> [364.431151] R10: 00000000c1e8b637 R11: 000000003d6a7231 R12: ffff88810132a5d0
<4> [364.431160] R13: 00000000000020a8 R14: 0000000000000092 R15: ffff8881199d41a8
<4> [364.431170] FS: 00007f5ddf704e40(0000) GS:ffff88817b900000(0000) knlGS:0000000000000000
<4> [364.431180] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4> [364.431190] CR2: 00005613de5058f0 CR3: 000000010b322000 CR4: 00000000001006e0
<4> [364.431200] Call Trace:
<4> [364.431212] <IRQ>
<4> [364.431234] fwtable_write32+0x113/0x1c0 [i915]
<4> [364.431554] gen8_logical_ring_enable_irq+0x30/0x50 [i915]
<4> [364.431873] irq_enable.part.10+0x23/0x40 [i915]
<4> [364.432188] signal_irq_work+0x62d/0x710 [i915]
<4> [364.432534] irq_work_single+0x3f/0x70
<4> [364.432559] irq_work_run_list+0x28/0x40
<4> [364.432574] irq_work_run+0x26/0x40
<4> [364.432587] __sysvec_irq_work+0x3e/0x1c0
<4> [364.432601] asm_call_irq_on_stack+0x12/0x20
<4> [364.432618] </IRQ>
<4> [364.432630] sysvec_irq_work+0xb8/0xd0
<4> [364.432649] asm_sysvec_irq_work+0x12/0x20
<4> [364.432661] RIP: 0010:_raw_spin_unlock_irqrestore+0x25/0x50
<4> [364.432675] Code: ff 5b c3 66 90 55 48 89 fd 48 83 c7 18 53 48 89 f3 48 8b 74 24 10 e8 3a f4 67 ff 48 89 ef e8 c2 36 68 ff f6 c7 02 75 1a 53 9d <bf> 01 00 00 00 e8 01 4c 64 ff 65 8b 05 da 8d 57 7e 85 c0 74 0a 5b
<4> [364.432685] RSP: 0018:ffffc900001d7870 EFLAGS: 00000246
<4> [364.432703] RAX: 0000000000000001 RBX: 0000000000000246 RCX: 0000000000000006
<4> [364.432713] RDX: 0000000000000000 RSI: ffffffff823bad26 RDI: ffffffff8235fc77
<4> [364.432722] RBP: ffff88811e4d6280 R08: 0000000000000001 R09: 0000000000000001
<4> [364.432732] R10: 0000000059d199cc R11: 0000000073f9dd03 R12: 0000000000000000
<4> [364.432741] R13: 0000000000000246 R14: ffff888104f7dae8 R15: ffff88811e4d6250
<4> [364.432802] dma_fence_add_callback+0x61/0xc0
<4> [364.432831] i915_request_wait+0x1fd/0x610 [i915]
<4> [364.433195] ? __i915_request_await_external+0x40/0x40 [i915]
<4> [364.433557] __lrc_isolation+0x1fb/0xdf0 [i915]
<4> [364.433888] ? __mutex_unlock_slowpath+0x3e/0x2a0
<4> [364.433932] live_lrc_isolation+0x101/0x240 [i915]
<4> [364.434287] __i915_subtests.cold.7+0x42/0x92 [i915]
<4> [364.434665] ? __i915_live_teardown+0x50/0x50 [i915]
<4> [364.435009] ? __intel_gt_live_setup+0x30/0x30 [i915]
<4> [364.435368] __run_selftests.part.3+0x100/0x161 [i915]
<4> [364.435748] i915_live_selftests.cold.5+0x1f/0x47 [i915]
<4> [364.436118] i915_pci_probe+0x93/0x1d0 [i915]
<4> [364.436420] ? _raw_spin_unlock_irqrestore+0x2f/0x50
<4> [364.436449] pci_device_probe+0x9e/0x110
<4> [364.436475] really_probe+0x1c4/0x430
<4> [364.436499] driver_probe_device+0xd9/0x140
<4> [364.436518] device_driver_attach+0x4a/0x50
<4> [364.436536] __driver_attach+0x83/0x140
<4> [364.436548] ? device_driver_attach+0x50/0x50
<4> [364.436561] ? device_driver_attach+0x50/0x50
<4> [364.436574] bus_for_each_dev+0x75/0xc0
<4> [364.436600] bus_add_driver+0x14b/0x1f0
<4> [364.436620] driver_register+0x66/0xb0
<4> [364.436637] i915_init+0x70/0x87 [i915]
<4> [364.436942] ? 0xffffffffa009f000
<4> [364.436953] do_one_initcall+0x56/0x2e0
<4> [364.436970] ? kmem_cache_alloc_trace+0x367/0x420
<4> [364.437004] do_init_module+0x55/0x200
<4> [364.437023] load_module+0x27a7/0x2a50
<4> [364.437135] ? __do_sys_finit_module+0xad/0x110
<4> [364.437146] __do_sys_finit_module+0xad/0x110
<4> [364.437210] do_syscall_64+0x33/0x80
<4> [364.437225] entry_SYSCALL_64_after_hwframe+0x44/0xa9
<4> [364.437238] RIP: 0033:0x7f5dded9c839
<4> [364.437249] 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> [364.437260] RSP: 002b:00007ffea87acde8 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
<4> [364.437278] RAX: ffffffffffffffda RBX: 00005624e5211d10 RCX: 00007f5dded9c839
<4> [364.437288] RDX: 0000000000000000 RSI: 00005624e52138b0 RDI: 0000000000000007
<4> [364.437297] RBP: 00005624e52138b0 R08: 0000000000000004 R09: 00005624e5208290
<4> [364.437306] R10: 00007ffea87acf30 R11: 0000000000000246 R12: 0000000000000000
<4> [364.437315] R13: 00005624e52037a0 R14: 0000000000000020 R15: 0000000000000045
<4> [364.437373] irq event stamp: 9253632
<4> [364.437382] hardirqs last enabled at (9253631): [<ffffffff81a9e132>] _raw_spin_unlock_irqrestore+0x42/0x50
<4> [364.437394] hardirqs last disabled at (9253632): [<ffffffff81a91a3c>] sysvec_irq_work+0xc/0xd0
<4> [364.437406] softirqs last enabled at (9253628): [<ffffffff81e00342>] __do_softirq+0x342/0x48e
<4> [364.437419] softirqs last disabled at (9253621): [<ffffffff81c00f52>] asm_call_irq_on_stack+0x12/0x20
<4> [364.437431] ---[ end trace 8dd7df4767c2efb6 ]---