[Bug 196337] [amdgpu][carrizo] Re-enable GFX PG breaks Carrizo

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=196337

--- Comment #1 from Johannes Hirte (johannes.hirte at datenkhaos.de) ---
Still an issue with linux-4.13-rc3. I can login via ssh, so I can provide the
logs. Showing blocked tasks gives me this:

[  620.046142] sysrq: SysRq : Show Blocked State
[  620.046155]   task                        PC stack   pid father
[  620.046194] disk_cache:0    D    0  2446      1 0x00000006
[  620.046201] Call Trace:
[  620.046214]  __schedule+0x217/0x710
[  620.046222]  ? preempt_count_add+0x6f/0xb0
[  620.046268]  ? _raw_spin_lock_irqsave+0x18/0x50
[  620.046274]  schedule+0x3b/0x90
[  620.046280]  amd_sched_entity_fini+0x95/0xe0
[  620.046286]  ? wait_woken+0x80/0x80
[  620.046292]  amdgpu_vm_fini+0x38/0x280
[  620.046297]  amdgpu_driver_postclose_kms+0x81/0x1f0
[  620.046302]  ? drm_master_release+0x61/0x110
[  620.046306]  drm_release+0x260/0x380
[  620.046312]  __fput+0xd4/0x1e0
[  620.046317]  ____fput+0x9/0x10
[  620.046322]  task_work_run+0x71/0x90
[  620.046327]  do_exit+0x2c1/0xb00
[  620.046332]  ? futex_wait+0x149/0x230
[  620.046336]  do_group_exit+0x3e/0xb0
[  620.046341]  get_signal+0x25b/0x610
[  620.046347]  do_signal+0x23/0x5e0
[  620.046352]  ? __schedule+0x217/0x710
[  620.046356]  ? preempt_count_add+0x6f/0xb0
[  620.046362]  ? strlcpy+0x36/0x50
[  620.046367]  exit_to_usermode_loop+0x53/0x90
[  620.046371]  syscall_return_slowpath+0x53/0x60
[  620.046374]  entry_SYSCALL_64_fastpath+0x92/0x94
[  620.046379] RIP: 0033:0x7fd3ebc0323d
[  620.046382] RSP: 002b:00007fd3dcc6bbb0 EFLAGS: 00000246 ORIG_RAX:
00000000000000ca
[  620.046386] RAX: fffffffffffffe00 RBX: 0000000001bf0cd8 RCX:
00007fd3ebc0323d
[  620.046389] RDX: 0000000000000000 RSI: 0000000000000080 RDI:
0000000001bf0d00
[  620.046392] RBP: 0000000000000000 R08: 0000000000000000 R09:
cccccccccccccccd
[  620.046395] R10: 0000000000000000 R11: 0000000000000246 R12:
0000000000000000
[  620.046398] R13: 0000000001bf0cb0 R14: 0000000000000000 R15:
0000000001bf0d00

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