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| author | Takashi Iwai <tiwai@suse.de> | 2006-08-04 12:57:19 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2006-09-23 10:39:59 +0200 |
| commit | 2529bba7606b23c1b7161d3c2ad486162e8650f9 (patch) | |
| tree | fc19403b51f9a8c3d080fac7acd50c3a95cb652c /sound/core | |
| parent | f03d68fe343d70bb06ecdb3d70dcf0e678ed99f9 (diff) | |
| download | lwn-2529bba7606b23c1b7161d3c2ad486162e8650f9.tar.gz lwn-2529bba7606b23c1b7161d3c2ad486162e8650f9.zip | |
[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')
| -rw-r--r-- | sound/core/control.c | 2 | ||||
| -rw-r--r-- | sound/core/pcm.c | 3 | ||||
| -rw-r--r-- | sound/core/rawmidi.c | 3 |
3 files changed, 6 insertions, 2 deletions
diff --git a/sound/core/control.c b/sound/core/control.c index 31ad58154c06..ac1442682eac 100644 --- a/sound/core/control.c +++ b/sound/core/control.c @@ -75,6 +75,8 @@ static int snd_ctl_open(struct inode *inode, struct file *file) init_waitqueue_head(&ctl->change_sleep); spin_lock_init(&ctl->read_lock); ctl->card = card; + ctl->prefer_pcm_subdevice = -1; + ctl->prefer_rawmidi_subdevice = -1; ctl->pid = current->pid; file->private_data = ctl; write_lock_irqsave(&card->ctl_files_rwlock, flags); 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); diff --git a/sound/core/rawmidi.c b/sound/core/rawmidi.c index 8a2bdfae63e3..269c467ca9bb 100644 --- a/sound/core/rawmidi.c +++ b/sound/core/rawmidi.c @@ -430,7 +430,8 @@ static int snd_rawmidi_open(struct inode *inode, struct file *file) kctl = snd_ctl_file(list); if (kctl->pid == current->pid) { subdevice = kctl->prefer_rawmidi_subdevice; - break; + if (subdevice != -1) + break; } } up_read(&card->controls_rwsem); |