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authorTakashi Iwai <tiwai@suse.de>2006-08-04 14:57:19 +0400
committerJaroslav Kysela <perex@suse.cz>2006-09-23 12:39:59 +0400
commit2529bba7606b23c1b7161d3c2ad486162e8650f9 (patch)
treefc19403b51f9a8c3d080fac7acd50c3a95cb652c /sound/core/pcm.c
parentf03d68fe343d70bb06ecdb3d70dcf0e678ed99f9 (diff)
downloadlinux-2529bba7606b23c1b7161d3c2ad486162e8650f9.tar.xz
[ALSA] Fix substream selection in PCM and rawmidi
The PCM and rawmidi substreams can be selected explicitly by opening control handle and set via *_PREFER_SUBDEVICE ioctl. But, when multiple controls are opened, the driver gets confused. The patch fixes the initialization of prefer_*_subdevice and the check of multiple controls. The first set subdevice is picked up as the valid one. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/core/pcm.c')
-rw-r--r--sound/core/pcm.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index f52178abf120..ed3b09469560 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -792,7 +792,8 @@ int snd_pcm_attach_substream(struct snd_pcm *pcm, int stream,
kctl = snd_ctl_file(list);
if (kctl->pid == current->pid) {
prefer_subdevice = kctl->prefer_pcm_subdevice;
- break;
+ if (prefer_subdevice != -1)
+ break;
}
}
up_read(&card->controls_rwsem);