[Intel-gfx] [PATCH] snd/hda: Flush interrupts on disabling

[Takashi Iwai]

On Sat, 20 Jul 2019 13:33:37 +0200,
Chris Wilson wrote:
> 
> I was looking at
> 
> <4> [241.835158] general protection fault: 0000 [#1] PREEMPT SMP PTI
> <4> [241.835181] CPU: 1 PID: 214 Comm: kworker/1:3 Tainted: G     U            5.2.0-CI-CI_DRM_6509+ #1
> <4> [241.835199] Hardware name: Dell Inc.                 OptiPlex 745                 /0GW726, BIOS 2.3.1  05/21/2007
> <4> [241.835234] Workqueue: events snd_hdac_bus_process_unsol_events [snd_hda_core]
> <4> [241.835256] RIP: 0010:input_handle_event+0x16d/0x5e0
> <4> [241.835270] Code: 48 8b 93 58 01 00 00 8b 52 08 89 50 04 8b 83 f8 06 00 00 48 8b 93 00 07 00 00 8d 70 01 48 8d 04 c2 83 e1 08 89 b3 f8 06 00 00 <66> 89 28 66 44 89 60 02 44 89 68 04 8b 93 f8 06 00 00 0f 84 fd fe
> <4> [241.835304] RSP: 0018:ffffc9000019fda0 EFLAGS: 00010046
> <4> [241.835317] RAX: 6b6b6b6ec6c6c6c3 RBX: ffff8880290fefc8 RCX: 0000000000000000
> <4> [241.835332] RDX: 000000006b6b6b6b RSI: 000000006b6b6b6c RDI: 0000000000000046
> <4> [241.835347] RBP: 0000000000000005 R08: 0000000000000000 R09: 0000000000000001
> <4> [241.835362] R10: ffffc9000019faa0 R11: 0000000000000000 R12: 0000000000000004
> <4> [241.835377] R13: 0000000000000000 R14: ffff8880290ff1d0 R15: 0000000000000293
> <4> [241.835392] FS:  0000000000000000(0000) GS:ffff88803de80000(0000) knlGS:0000000000000000
> <4> [241.835409] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> <4> [241.835422] CR2: 00007ffe9a99e9b7 CR3: 000000002f588000 CR4: 00000000000006e0
> <4> [241.835436] Call Trace:
> <4> [241.835449]  input_event+0x45/0x70
> <4> [241.835464]  snd_jack_report+0xdc/0x100
> <4> [241.835490]  snd_hda_jack_report_sync+0x83/0xc0 [snd_hda_codec]
> <4> [241.835512]  snd_hdac_bus_process_unsol_events+0x5a/0x70 [snd_hda_core]
> <4> [241.835530]  process_one_work+0x245/0x610
> 
> which has the hallmarks of a worker queued from interrupt after it was
> supposedly cancelled (note the POISON_FREE), and I could not see where
> the interrupt would be flushed on shutdown so added the likely suspects.
> 
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111174
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Takashi Iwai <tiwai at suse.de>
> Cc: Jaroslav Kysela <perex at perex.cz>

OK, I'll queue this to my for-next branch, as it looks like a right
thing (although not sure whether it fixes actually).


thanks,

Takashi