Warning at drivers/gpu/drm/i915/intel_runtime_pm.c:638

From: Thomas Voegtle <tv@lio96.de>
To: "Imre Deak" <imre.deak@intel.com>,
	linux-kernel@vger.kernel.org,
	"Khaled Almahallawy" <khaled.almahallawy@intel.com>,
	"Ville Syrjälä" <ville.syrjala@linux.intel.com>
Subject: Warning at drivers/gpu/drm/i915/intel_runtime_pm.c:638
Date: Sun, 13 Jun 2021 20:11:48 +0200 (CEST)	[thread overview]
Message-ID: <cea1f9a-52e0-b83-593d-52997fe1aaf6@er-systems.de> (raw)

Hi,

since 5.13.0-rcX I get that warning below when shutting down or reboot.
There is only this warning I have no other problems with the driver.
Shutdown or reboot is successful.

I bisected it down to:

commit 7962893ecb853aa7c8925ce237ab6c4274cfc1c7
Author: Imre Deak <imre.deak@intel.com>
Date:   Wed Jan 27 20:19:09 2021 +0200

     drm/i915: Disable runtime power management during shutdown

...
[  OK  ] Reached target Shutdown.
[   43.142532] ------------[ cut here ]------------
[   43.147160] i915 0000:00:02.0: i915 raw-wakerefs=1 wakelocks=1 on 
cleanup
[   43.153949] WARNING: CPU: 3 PID: 1 at 
drivers/gpu/drm/i915/intel_runtime_pm.c:638 
intel_runtime_pm_driver_release+0x42/0x50
[   43.165069] CPU: 3 PID: 1 Comm: systemd-shutdow Not tainted 
5.13.0-rc5-i5-00235-g43cb5d49a99b #333
[   43.174019] Hardware name: To Be Filled By O.E.M. To Be Filled By 
O.E.M./H81 Pro BTC R2.0, BIOS P1.20 07/22/2014
[   43.184176] RIP: 0010:intel_runtime_pm_driver_release+0x42/0x50
[   43.190096] Code: fc 10 0f b7 d9 48 8b 6f 50 48 85 ed 74 23 e8 05 c4 10 
00 45 89 e0 89 d9 48 89 ea 48 89 c6 48 c7 c7 c0 96 07 94 e8 0e 8c b6 ff 
<0f> 0b 5b 5d 41
5c c3 48 8b 2f eb d8 66 90 48 8b 87 68 99 ff ff 48
[   43.208842] RSP: 0018:ffffb2028002bd30 EFLAGS: 00010282
[   43.214069] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 
00000000ffff7fff
[   43.221200] RDX: ffffb2028002bb50 RSI: 00000000ffff7fff RDI: 
0000000000000003
[   43.228324] RBP: ffff971840982e80 R08: 0000000000000000 R09: 
0000000000000001
[   43.235448] R10: 0000000000000000 R11: ffffb2028002bb48 R12: 
0000000000000001
[   43.242572] R13: ffffffff940a33d3 R14: ffff971840a22948 R15: 
0000000000000000
[   43.249696] FS:  00007f1bba03a1c0(0000) GS:ffff971a53780000(0000) 
knlGS:0000000000000000
[   43.257776] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   43.263519] CR2: 00007f1bb97d94a0 CR3: 00000001080b8002 CR4: 
00000000001706e0
[   43.270645] Call Trace:
[   43.273089]  device_shutdown+0x149/0x1f0
[   43.277015]  kernel_restart+0x9/0x50
[   43.280593]  __do_sys_reboot+0xe7/0x1d0
[   43.284433]  ? vfs_writev+0xb4/0x150
[   43.288014]  ? __cond_resched+0x10/0x40
[   43.291851]  ? task_work_run+0x6c/0xa0
[   43.295604]  do_syscall_64+0x5d/0x70
[   43.299185]  ? syscall_exit_to_user_mode+0x20/0x40
[   43.303978]  ? do_syscall_64+0x69/0x70
[   43.307730]  ? exc_page_fault+0x201/0x600
[   43.311741]  ? asm_exc_page_fault+0x8/0x30
[   43.315841]  entry_SYSCALL_64_after_hwframe+0x44/0xae
[   43.320894] RIP: 0033:0x7f1bb95177d6
[   43.324475] Code: 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 
00 00 48 63 d7 be 69 19 12 28 48 c7 c7 ad de e1 fe b8 a9 00 00 00 0f 05 
<48> 3d 00 f0 ff
ff 77 02 f3 c3 48 8b 15 91 06 2c 00 f7 d8 64 89 02
[   43.343218] RSP: 002b:00007fffea4c3cc8 EFLAGS: 00000202 ORIG_RAX: 
00000000000000a9
[   43.350785] RAX: ffffffffffffffda RBX: 0000000001234567 RCX: 
00007f1bb95177d6
[   43.357909] RDX: 0000000001234567 RSI: 0000000028121969 RDI: 
fffffffffee1dead
[   43.365041] RBP: 0000000000000000 R08: 0000000000000000 R09: 
0000000000000000
[   43.372166] R10: 0000000000000002 R11: 0000000000000202 R12: 
0000000000000000
[   43.379291] R13: 00007fffea4c3e78 R14: 0000000000000000 R15: 
0000000000000000
[   43.386422] ---[ end trace be6a3ef0677f3d04 ]---
[   43.391174] reboot: Restarting system

Hope this useful for you,

       Thomas