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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/vwsnd.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/vwsnd.c')
-rw-r--r--sound/oss/vwsnd.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/sound/oss/vwsnd.c b/sound/oss/vwsnd.c
index 20b3b325aa80..99c94c48558c 100644
--- a/sound/oss/vwsnd.c
+++ b/sound/oss/vwsnd.c
@@ -2921,6 +2921,7 @@ static int vwsnd_audio_open(struct inode *inode, struct file *file)
DBGE("(inode=0x%p, file=0x%p)\n", inode, file);
+ lock_kernel();
INC_USE_COUNT;
for (devc = vwsnd_dev_list; devc; devc = devc->next_dev)
if ((devc->audio_minor & ~0x0F) == (minor & ~0x0F))
@@ -2928,6 +2929,7 @@ static int vwsnd_audio_open(struct inode *inode, struct file *file)
if (devc == NULL) {
DEC_USE_COUNT;
+ unlock_kernel();
return -ENODEV;
}
@@ -2936,11 +2938,13 @@ static int vwsnd_audio_open(struct inode *inode, struct file *file)
mutex_unlock(&devc->open_mutex);
if (file->f_flags & O_NONBLOCK) {
DEC_USE_COUNT;
+ unlock_kernel();
return -EBUSY;
}
interruptible_sleep_on(&devc->open_wait);
if (signal_pending(current)) {
DEC_USE_COUNT;
+ unlock_kernel();
return -ERESTARTSYS;
}
mutex_lock(&devc->open_mutex);
@@ -2993,6 +2997,7 @@ static int vwsnd_audio_open(struct inode *inode, struct file *file)
file->private_data = devc;
DBGRV();
+ unlock_kernel();
return 0;
}
@@ -3062,15 +3067,18 @@ static int vwsnd_mixer_open(struct inode *inode, struct file *file)
DBGEV("(inode=0x%p, file=0x%p)\n", inode, file);
INC_USE_COUNT;
+ lock_kernel();
for (devc = vwsnd_dev_list; devc; devc = devc->next_dev)
if (devc->mixer_minor == iminor(inode))
break;
if (devc == NULL) {
DEC_USE_COUNT;
+ unlock_kernel();
return -ENODEV;
}
file->private_data = devc;
+ unlock_kernel();
return 0;
}