[Bug 104825] [amdgpu] [drm:gfx_v8_0_hw_fini] *ERROR* KCQ disabled failed (scratch(0xC040)=0x00000000) when unbinding

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Comment # 17 on bug 104825 from
No issues on drm-next-4.17-wip, unbinding works without any lockdep issues.

Do you plan to backport these changes to 4.16 or maybe even 4.15?


For the record, suspend fails on drm-next-4.17-wip. This could be possibly
related, but I don't know how to debug this and most likely this is out of
scope of this bug.

[   96.222095] PM: suspend entry (deep)
[   96.222099] PM: Syncing filesystems ... done.
[   96.230020] INFO: trying to register non-static key.
[   96.230024] the code is fine but needs lockdep annotation.
[   96.230026] turning off the locking correctness validator.
[   96.230029] CPU: 39 PID: 4506 Comm: pm-suspend Not tainted 4.16.0-rc7+ #2
[   96.230031] Hardware name: ASUSTeK COMPUTER INC. Z10PE-D16 WS/Z10PE-D16 WS,
BIOS 3407 03/10/2017
[   96.230033] Call Trace:
[   96.230040]  dump_stack+0x46/0x59
[   96.230046]  register_lock_class+0x192/0x361
[   96.230050]  ? cycles_2_ns+0x55/0x75
[   96.230054]  __lock_acquire.isra.30+0x97/0x595
[   96.230057]  lock_acquire+0x105/0x12e
[   96.230060]  ? devres_for_each_res+0x41/0xc4
[   96.230064]  ? __fw_entry_found+0x3b/0x3b
[   96.230068]  _raw_spin_lock_irqsave+0x3d/0x74
[   96.230071]  ? devres_for_each_res+0x41/0xc4
[   96.230073]  ? kref_get+0xa/0xa
[   96.230075]  ? alloc_fw_cache_entry+0x4e/0x4e
[   96.230077]  devres_for_each_res+0x41/0xc4
[   96.230096]  dev_cache_fw_image+0x59/0x11d
[   96.230098]  ? fw_pm_notify+0xd1/0xd1
[   96.230102]  dpm_for_each_dev+0x41/0x58
[   96.230104]  fw_pm_notify+0xac/0xd1
[   96.230108]  notifier_call_chain+0x39/0x5a
[   96.230127]  __blocking_notifier_call_chain+0x4e/0x65
[   96.230130]  __pm_notifier_call_chain+0x1b/0x2f
[   96.230133]  pm_suspend+0x15b/0x2c1
[   96.230135]  state_store+0x4b/0x7e
[   96.230140]  kernfs_fop_write+0x114/0x15c
[   96.230145]  __vfs_write+0x33/0xd7
[   96.230148]  ? __sb_start_write+0x94/0x180
[   96.230150]  ? __sb_start_write+0xc0/0x180
[   96.230153]  vfs_write+0xa5/0xe2
[   96.230156]  SyS_write+0x5f/0xa3
[   96.230160]  do_syscall_64+0x79/0x88
[   96.230164]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   96.230166] RIP: 0033:0x7fac7a914468
[   96.230168] RSP: 002b:00007ffea25554e0 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
[   96.230171] RAX: ffffffffffffffda RBX: 0000000000000004 RCX:
00007fac7a914468
[   96.230172] RDX: 0000000000000004 RSI: 0000558679eb4500 RDI:
0000000000000001
[   96.230174] RBP: 0000558679eb4500 R08: 000000000000000a R09:
0000558679eeb6b0
[   96.230175] R10: 00007fac7a9a5b20 R11: 0000000000000246 R12:
0000000000000004
[   96.230177] R13: 0000000000000001 R14: 00007fac7abe1740 R15:
0000000000000004
[   96.230183] BUG: unable to handle kernel NULL pointer dereference at
0000000000000008
[   96.230189] IP: devres_for_each_res+0x59/0xc4
[   96.230191] PGD 0 P4D 0 
[   96.230196] Oops: 0000 [#1] PREEMPT SMP PTI
[   96.230199] Modules linked in:
[   96.230203] CPU: 39 PID: 4506 Comm: pm-suspend Not tainted 4.16.0-rc7+ #2
[   96.230205] Hardware name: ASUSTeK COMPUTER INC. Z10PE-D16 WS/Z10PE-D16 WS,
BIOS 3407 03/10/2017
[   96.230208] RIP: 0010:devres_for_each_res+0x59/0xc4
[   96.230210] RSP: 0018:ffffa63689fabc70 EFLAGS: 00010086
[   96.230214] RAX: 0000000000000000 RBX: ffff9fd574d4ad98 RCX:
ffff9fd574d4b1f0
[   96.230216] RDX: ffff9fd576ea0918 RSI: ffff9fd574d4b1c0 RDI:
ffff9fd576ea0918
[   96.230218] RBP: ffffffffa8951b3a R08: 0000000000000000 R09:
0000000000000000
[   96.230221] R10: ffff9fd576ea0000 R11: ffffffffab22aa07 R12:
ffffffffa8951f44
[   96.230223] R13: dead000000000100 R14: ffffffffa8951c08 R15:
ffff9fd574d4b1a8
[   96.230226] FS:  00007fac7b021740(0000) GS:ffff9fe57f400000(0000)
knlGS:0000000000000000
[   96.230229] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   96.230231] CR2: 0000000000000008 CR3: 000000202a4a8002 CR4:
00000000003606e0
[   96.230233] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[   96.230236] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[   96.230238] Call Trace:
[   96.230243]  dev_cache_fw_image+0x59/0x11d
[   96.230247]  ? fw_pm_notify+0xd1/0xd1
[   96.230250]  dpm_for_each_dev+0x41/0x58
[   96.230253]  fw_pm_notify+0xac/0xd1
[   96.230256]  notifier_call_chain+0x39/0x5a
[   96.230261]  __blocking_notifier_call_chain+0x4e/0x65
[   96.230264]  __pm_notifier_call_chain+0x1b/0x2f
[   96.230267]  pm_suspend+0x15b/0x2c1
[   96.230271]  state_store+0x4b/0x7e
[   96.230275]  kernfs_fop_write+0x114/0x15c
[   96.230279]  __vfs_write+0x33/0xd7
[   96.230284]  ? __sb_start_write+0x94/0x180
[   96.230286]  ? __sb_start_write+0xc0/0x180
[   96.230290]  vfs_write+0xa5/0xe2
[   96.230295]  SyS_write+0x5f/0xa3
[   96.230299]  do_syscall_64+0x79/0x88
[   96.230303]  entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[   96.230305] RIP: 0033:0x7fac7a914468
[   96.230308] RSP: 002b:00007ffea25554e0 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
[   96.230311] RAX: ffffffffffffffda RBX: 0000000000000004 RCX:
00007fac7a914468
[   96.230313] RDX: 0000000000000004 RSI: 0000558679eb4500 RDI:
0000000000000001
[   96.230316] RBP: 0000558679eb4500 R08: 000000000000000a R09:
0000558679eeb6b0
[   96.230318] R10: 00007fac7a9a5b20 R11: 0000000000000246 R12:
0000000000000004
[   96.230320] R13: 0000000000000001 R14: 00007fac7abe1740 R15:
0000000000000004
[   96.230326] Code: 48 83 ec 28 48 89 4c 24 18 4c 89 4c 24 20 e8 ca 7d 4b 00
48 8d 8b 58 04 00 00 48 89 44 24 08 48 8b 83 60 04 00 00 48 89 4c 24 10 <4c> 8b
68 08 48 3b 44 24 10 74 44 4c 3b 70 10 75 35 48 83 c0 28 
[   96.230390] RIP: devres_for_each_res+0x59/0xc4 RSP: ffffa63689fabc70
[   96.230392] CR2: 0000000000000008
[   96.230395] ---[ end trace 43f33fa700a0efa9 ]---
[   96.233392] note: pm-suspend[4506] exited with preempt_count 1


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