From 83de8f83816e8e15227dac985163e3d433a2bf9d Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Fri, 19 Nov 2021 11:26:29 +0100
Subject: [PATCH] ALSA: usb-audio: Don't start stream for capture at prepare
Git-commit: 83de8f83816e8e15227dac985163e3d433a2bf9d
Patch-mainline: v5.16-rc3
References: bsc#1192354
The recent change made mistakenly the stream for capture started at
prepare stage. Add the stream direction check to avoid it.
Fixes: 9c9a3b9da891 ("ALSA: usb-audio: Rename early_playback_start flag with lowlatency_playback")
Link: https://lore.kernel.org/r/20211119102629.7476-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/usb/pcm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 57b046e73bfe..cec6e91afea2 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -640,7 +640,8 @@ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream)
runtime->delay = 0;
subs->lowlatency_playback = lowlatency_playback_available(runtime, subs);
- if (!subs->lowlatency_playback)
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK &&
+ !subs->lowlatency_playback)
ret = start_endpoints(subs);
unlock:
--
2.26.2