If the SOF hw_params() fail, typically with an IPC error thrown by the
firmware, the period_elapsed workqueue is not initialized, but we
still cancel it in hw_free(), which results in a kernel warning.
Move the initialization to the .open callback. Tested on Broadwell
(Samus) and IceLake.
Fixes: e2803e610ae ("ASoC: SOF: PCM: add period_elapsed work to fix
race condition in interrupt context")
GitHub issue: https://github.com/thesofproject/linux/issues/932
Reviewed-by: Takashi Iwai <tiwai@xxxxxxx>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
---
sound/soc/sof/pcm.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/sound/soc/sof/pcm.c b/sound/soc/sof/pcm.c
index e94892053690..6dc5f97be0bc 100644
--- a/sound/soc/sof/pcm.c
+++ b/sound/soc/sof/pcm.c
@@ -211,9 +211,6 @@ static int sof_pcm_hw_params(struct snd_pcm_substream *substream,
/* save pcm hw_params */
memcpy(&spcm->params[substream->stream], params, sizeof(*params));
- INIT_WORK(&spcm->stream[substream->stream].period_elapsed_work,
- sof_pcm_period_elapsed_work);
-
/* clear hw_params_upon_resume flag */
spcm->hw_params_upon_resume[substream->stream] = 0;
@@ -431,6 +428,9 @@ static int sof_pcm_open(struct snd_pcm_substream *substream)
dev_dbg(sdev->dev, "pcm: open stream %d dir %d\n", spcm->pcm.pcm_id,
substream->stream);
+ INIT_WORK(&spcm->stream[substream->stream].period_elapsed_work,
+ sof_pcm_period_elapsed_work);
+
caps = &spcm->pcm.caps[substream->stream];
/* set any runtime constraints based on topology */
--
2.20.1
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
