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* [PATCH v3] ALSA: hda/i915 - avoid hung task timeout in i915 wait
@ 2022-03-09 18:24 ` Kai Vehmanen
  0 siblings, 0 replies; 7+ messages in thread
From: Kai Vehmanen @ 2022-03-09 18:24 UTC (permalink / raw)
  To: alsa-devel, tiwai
  Cc: tvrtko.ursulin, kai.vehmanen, Ramalingam C, intel-gfx,
	lucas.demarchi, amadeuszx.slawinski

If kernel is built with hung task detection enabled and
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT set to less than 60 seconds,
snd_hdac_i915_init() will trigger the hung task timeout in case i915 is
not available and taint the kernel.

Use wait_for_completion_killable_timeout() for the wait to
avoid this problem.

Co-developed-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
---
 sound/hda/hdac_i915.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Changes V2->V3:
 - drop the loop and just use 
   wait_for_completion_killable_timeout() (feedback from Tvrtko Ursulin)
 - new approach, so dropped the previous reviewed-by tags

diff --git a/sound/hda/hdac_i915.c b/sound/hda/hdac_i915.c
index 454474ac5716..efe810af28c5 100644
--- a/sound/hda/hdac_i915.c
+++ b/sound/hda/hdac_i915.c
@@ -160,8 +160,8 @@ int snd_hdac_i915_init(struct hdac_bus *bus)
 		if (!IS_ENABLED(CONFIG_MODULES) ||
 		    !request_module("i915")) {
 			/* 60s timeout */
-			wait_for_completion_timeout(&acomp->master_bind_complete,
-						    msecs_to_jiffies(60 * 1000));
+			wait_for_completion_killable_timeout(&acomp->master_bind_complete,
+							     msecs_to_jiffies(60 * 1000));
 		}
 	}
 	if (!acomp->ops) {

base-commit: 3a0099a1909dea6022690b0ae496938dd2e5771c
-- 
2.35.1


^ permalink raw reply related	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2022-03-10 13:37 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2022-03-09 18:24 [PATCH v3] ALSA: hda/i915 - avoid hung task timeout in i915 wait Kai Vehmanen
2022-03-09 18:24 ` [Intel-gfx] " Kai Vehmanen
2022-03-09 19:59 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for ALSA: hda/i915 - avoid hung task timeout in i915 wait (rev3) Patchwork
2022-03-10 13:15 ` [PATCH v3] ALSA: hda/i915 - avoid hung task timeout in i915 wait Tvrtko Ursulin
2022-03-10 13:15   ` [Intel-gfx] " Tvrtko Ursulin
2022-03-10 13:36 ` Takashi Iwai
2022-03-10 13:36   ` [Intel-gfx] " Takashi Iwai

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