summaryrefslogtreecommitdiff
path: root/sound/oss/soundcard.c
diff options
context:
space:
mode:
authorArnd Bergmann <arnd@arndb.de>2010-07-11 12:16:36 +0200
committerTakashi Iwai <tiwai@suse.de>2010-07-12 17:41:05 +0200
commit90dc763fef4c869e60b2a7ad92e1a7dab68575ea (patch)
treeab3757f14a6d84e36afa36ac5f325fd316d4e197 /sound/oss/soundcard.c
parent395c61d19621e80b763810cc988416dc1b6bfd3e (diff)
sound: push BKL into open functions
This moves the lock_kernel() call from soundcore_open to the individual OSS device drivers, where we can deal with it one driver at a time if needed, or just kill off the drivers. All core components in ALSA already provide adequate locking in their open()-functions and do not require the big kernel lock, so there is no need to add the BKL there. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/oss/soundcard.c')
-rw-r--r--sound/oss/soundcard.c20
1 files changed, 11 insertions, 9 deletions
diff --git a/sound/oss/soundcard.c b/sound/oss/soundcard.c
index 2d9c51312622..92aa762ffb7e 100644
--- a/sound/oss/soundcard.c
+++ b/sound/oss/soundcard.c
@@ -210,42 +210,44 @@ static int sound_open(struct inode *inode, struct file *file)
printk(KERN_ERR "Invalid minor device %d\n", dev);
return -ENXIO;
}
+ lock_kernel();
switch (dev & 0x0f) {
case SND_DEV_CTL:
dev >>= 4;
if (dev >= 0 && dev < MAX_MIXER_DEV && mixer_devs[dev] == NULL) {
request_module("mixer%d", dev);
}
+ retval = -ENXIO;
if (dev && (dev >= num_mixers || mixer_devs[dev] == NULL))
- return -ENXIO;
+ break;
if (!try_module_get(mixer_devs[dev]->owner))
- return -ENXIO;
+ break;
+
+ retval = 0;
break;
case SND_DEV_SEQ:
case SND_DEV_SEQ2:
- if ((retval = sequencer_open(dev, file)) < 0)
- return retval;
+ retval = sequencer_open(dev, file);
break;
case SND_DEV_MIDIN:
- if ((retval = MIDIbuf_open(dev, file)) < 0)
- return retval;
+ retval = MIDIbuf_open(dev, file);
break;
case SND_DEV_DSP:
case SND_DEV_DSP16:
case SND_DEV_AUDIO:
- if ((retval = audio_open(dev, file)) < 0)
- return retval;
+ retval = audio_open(dev, file);
break;
default:
printk(KERN_ERR "Invalid minor device %d\n", dev);
- return -ENXIO;
+ retval = -ENXIO;
}
+ unlock_kernel();
return 0;
}