https://bugs.freedesktop.org/show_bug.cgi?id=104142

            Bug ID: 104142
           Summary: Stack trace in runpm when Tonga card powers down
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: mike@fireburn.co.uk

Created attachment 135997
  --> https://bugs.freedesktop.org/attachment.cgi?id=135997&action=edit
Dmesg

[ 9087.801615] WARNING: CPU: 6 PID: 1002 at dm_suspend+0x49/0x50
[ 9087.801617] Modules linked in:
[ 9087.801620] CPU: 6 PID: 1002 Comm: kworker/6:0 Tainted: G        W       
4.15.0-rc2-agd5f+ #300
[ 9087.801621] Hardware name: Alienware Alienware 15 R2/0H6J09, BIOS 1.3.12
07/28/2017
[ 9087.801622] Workqueue: pm pm_runtime_work
[ 9087.801623] task: 00000000fc3d3872 task.stack: 00000000a1a771ba
[ 9087.801624] RIP: 0010:dm_suspend+0x49/0x50
[ 9087.801625] RSP: 0018:ffffc900000fbca0 EFLAGS: 00010282
[ 9087.801626] RAX: 0000000000000000 RBX: ffff88089c9e0000 RCX:
0000000000000000
[ 9087.801627] RDX: 0000000000000001 RSI: 0000000000000282 RDI:
ffff88089c9ea8f0
[ 9087.801627] RBP: 0000000000000003 R08: 00000000c0000000 R09:
ffffffff824e7648
[ 9087.801628] R10: ffffea001e7c8020 R11: ffff8808c1d19480 R12:
ffff88089c9e0000
[ 9087.801628] R13: ffffffff82241e98 R14: 0000000000000004 R15:
ffffffff816b7670
[ 9087.801629] FS:  0000000000000000(0000) GS:ffff8808c1d80000(0000)
knlGS:0000000000000000
[ 9087.801630] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 9087.801631] CR2: 00007f43c544dbb8 CR3: 000000000240a004 CR4:
00000000001606e0
[ 9087.801631] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 9087.801632] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 9087.801632] Call Trace:
[ 9087.801636]  amdgpu_suspend+0x61/0x170
[ 9087.801637]  amdgpu_device_suspend+0x195/0x390
[ 9087.801639]  ? vga_switcheroo_runtime_resume+0x50/0x50
[ 9087.801640]  amdgpu_pmops_runtime_suspend+0x4d/0xc0
[ 9087.801642]  pci_pm_runtime_suspend+0x4d/0x120
[ 9087.801644]  vga_switcheroo_runtime_suspend+0x19/0x90
[ 9087.801645]  __rpm_callback+0xb5/0x1e0
[ 9087.801647]  ? vga_switcheroo_runtime_resume+0x50/0x50
[ 9087.801648]  rpm_callback+0x1a/0x70
[ 9087.801649]  ? vga_switcheroo_runtime_resume+0x50/0x50
[ 9087.801650]  rpm_suspend+0x124/0x650
[ 9087.801652]  pm_runtime_work+0x58/0x80
[ 9087.801653]  process_one_work+0x1d5/0x3d0
[ 9087.801655]  worker_thread+0x42/0x3e0
[ 9087.801656]  kthread+0xf0/0x130
[ 9087.801657]  ? cancel_delayed_work+0x10/0x10
[ 9087.801658]  ? kthread_create_worker_on_cpu+0x70/0x70
[ 9087.801660]  ret_from_fork+0x1f/0x30
[ 9087.801661] Code: a9 00 00 00 75 25 48 8b 7b 08 e8 93 4f f0 ff 48 8b bb 00
92 00 00 be 08 00 00 00 48 89 83 68 a9 00 00 e8 bb 4f 04 00 31 c0 5b c3 <0f> ff
eb d7 0f 1f 00 53 48 89 fb 48 8b bf 20 92 00 00 e8 20 8d
[ 9087.801675] ---[ end trace 8e3cd942fb9ca189 ]---
[ 9087.996944] amdgpu 0000:01:00.0: GPU pci config reset


I'm seeing these a lot, also in Linus's tree

Will try and bisect later though I have a funny feeling it might be DC related

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