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| author | Arnd Bergmann <arnd@arndb.de> | 2010-07-11 12:16:36 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-07-12 17:41:05 +0200 |
| commit | 90dc763fef4c869e60b2a7ad92e1a7dab68575ea (patch) | |
| tree | ab3757f14a6d84e36afa36ac5f325fd316d4e197 /sound/oss/vwsnd.c | |
| parent | 395c61d19621e80b763810cc988416dc1b6bfd3e (diff) | |
| download | kernel_samsung_smdk4412-90dc763fef4c869e60b2a7ad92e1a7dab68575ea.zip kernel_samsung_smdk4412-90dc763fef4c869e60b2a7ad92e1a7dab68575ea.tar.gz kernel_samsung_smdk4412-90dc763fef4c869e60b2a7ad92e1a7dab68575ea.tar.bz2 | |
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.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/sound/oss/vwsnd.c b/sound/oss/vwsnd.c index 20b3b32..99c94c4 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; } |