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>
diff --git a/sound/oss/msnd_pinnacle.c b/sound/oss/msnd_pinnacle.c
index a1e3f96..153d822 100644
--- a/sound/oss/msnd_pinnacle.c
+++ b/sound/oss/msnd_pinnacle.c
@@ -756,12 +756,15 @@
int minor = iminor(inode);
int err = 0;
+ lock_kernel();
if (minor == dev.dsp_minor) {
if ((file->f_mode & FMODE_WRITE &&
test_bit(F_AUDIO_WRITE_INUSE, &dev.flags)) ||
(file->f_mode & FMODE_READ &&
- test_bit(F_AUDIO_READ_INUSE, &dev.flags)))
- return -EBUSY;
+ test_bit(F_AUDIO_READ_INUSE, &dev.flags))) {
+ err = -EBUSY;
+ goto out;
+ }
if ((err = dsp_open(file)) >= 0) {
dev.nresets = 0;
@@ -782,7 +785,8 @@
/* nothing */
} else
err = -EINVAL;
-
+out:
+ unlock_kernel();
return err;
}