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* [PATCH] ASoC: sti: Fix deadlock via snd_pcm_stop_xrun() call
@ 2022-03-15 16:41 Takashi Iwai
  2022-03-15 16:58 ` Arnaud POULIQUEN
  2022-03-16 20:35 ` Mark Brown
  0 siblings, 2 replies; 3+ messages in thread
From: Takashi Iwai @ 2022-03-15 16:41 UTC (permalink / raw)
  To: Mark Brown; +Cc: Arnaud Pouliquen, Daniel Palmer, alsa-devel

This is essentially a revert of the commit dc865fb9e7c2 ("ASoC: sti:
Use snd_pcm_stop_xrun() helper"), which converted the manual
snd_pcm_stop() calls with snd_pcm_stop_xrun().

The commit above introduced a deadlock as snd_pcm_stop_xrun() itself
takes the PCM stream lock while the caller already holds it.  Since
the conversion was done only for consistency reason and the open-call
with snd_pcm_stop() to the XRUN state is a correct usage, let's revert
the commit back as the fix.

Fixes: dc865fb9e7c2 ("ASoC: sti: Use snd_pcm_stop_xrun() helper")
Reported-by: Daniel Palmer <daniel@0x0f.com>
Cc: Arnaud POULIQUEN <arnaud.pouliquen@st.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20220315091319.3351522-1-daniel@0x0f.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/soc/sti/uniperif_player.c | 6 +++---
 sound/soc/sti/uniperif_reader.c | 2 +-
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/sound/soc/sti/uniperif_player.c b/sound/soc/sti/uniperif_player.c
index 2ed92c990b97..dd9013c47664 100644
--- a/sound/soc/sti/uniperif_player.c
+++ b/sound/soc/sti/uniperif_player.c
@@ -91,7 +91,7 @@ static irqreturn_t uni_player_irq_handler(int irq, void *dev_id)
 			SET_UNIPERIF_ITM_BCLR_FIFO_ERROR(player);
 
 			/* Stop the player */
-			snd_pcm_stop_xrun(player->substream);
+			snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
 		}
 
 		ret = IRQ_HANDLED;
@@ -105,7 +105,7 @@ static irqreturn_t uni_player_irq_handler(int irq, void *dev_id)
 		SET_UNIPERIF_ITM_BCLR_DMA_ERROR(player);
 
 		/* Stop the player */
-		snd_pcm_stop_xrun(player->substream);
+		snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
 
 		ret = IRQ_HANDLED;
 	}
@@ -138,7 +138,7 @@ static irqreturn_t uni_player_irq_handler(int irq, void *dev_id)
 		dev_err(player->dev, "Underflow recovery failed\n");
 
 		/* Stop the player */
-		snd_pcm_stop_xrun(player->substream);
+		snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
 
 		ret = IRQ_HANDLED;
 	}
diff --git a/sound/soc/sti/uniperif_reader.c b/sound/soc/sti/uniperif_reader.c
index 136059331211..065c5f0d1f5f 100644
--- a/sound/soc/sti/uniperif_reader.c
+++ b/sound/soc/sti/uniperif_reader.c
@@ -65,7 +65,7 @@ static irqreturn_t uni_reader_irq_handler(int irq, void *dev_id)
 	if (unlikely(status & UNIPERIF_ITS_FIFO_ERROR_MASK(reader))) {
 		dev_err(reader->dev, "FIFO error detected\n");
 
-		snd_pcm_stop_xrun(reader->substream);
+		snd_pcm_stop(reader->substream, SNDRV_PCM_STATE_XRUN);
 
 		ret = IRQ_HANDLED;
 	}
-- 
2.31.1


^ permalink raw reply related	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2022-03-16 20:37 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2022-03-15 16:41 [PATCH] ASoC: sti: Fix deadlock via snd_pcm_stop_xrun() call Takashi Iwai
2022-03-15 16:58 ` Arnaud POULIQUEN
2022-03-16 20:35 ` Mark Brown

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