[alsa-devel] Applied "ASoC: wm_adsp: Check for buffer in trigger stop" to the asoc tree

[Mark Brown]

The patch

   ASoC: wm_adsp: Check for buffer in trigger stop

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 43d147be5738a9ed6cfb25c285ac50d6dd5793be Mon Sep 17 00:00:00 2001
From: Charles Keepax <ckeepax at opensource.cirrus.com>
Date: Tue, 2 Apr 2019 13:49:14 +0100
Subject: [PATCH] ASoC: wm_adsp: Check for buffer in trigger stop

Trigger stop can be called in situations where trigger start failed
and as such it can't be assumed the buffer is already attached to
the compressed stream or a NULL pointer may be dereferenced.

Fixes: 639e5eb3c7d6 ("ASoC: wm_adsp: Correct handling of compressed streams that restart")
Signed-off-by: Charles Keepax <ckeepax at opensource.cirrus.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/codecs/wm_adsp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/wm_adsp.c b/sound/soc/codecs/wm_adsp.c
index 5608ed5decca..b0b48eb9c7c9 100644
--- a/sound/soc/codecs/wm_adsp.c
+++ b/sound/soc/codecs/wm_adsp.c
@@ -3587,7 +3587,8 @@ int wm_adsp_compr_trigger(struct snd_compr_stream *stream, int cmd)
 		}
 		break;
 	case SNDRV_PCM_TRIGGER_STOP:
-		wm_adsp_buffer_clear(compr->buf);
+		if (wm_adsp_compr_attached(compr))
+			wm_adsp_buffer_clear(compr->buf);
 		break;
 	default:
 		ret = -EINVAL;
-- 
2.20.1