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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 /arch
parent395c61d19621e80b763810cc988416dc1b6bfd3e (diff)
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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 'arch')
-rw-r--r--arch/um/drivers/hostaudio_kern.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/um/drivers/hostaudio_kern.c b/arch/um/drivers/hostaudio_kern.c
index ae42695c359..68142df7660 100644
--- a/arch/um/drivers/hostaudio_kern.c
+++ b/arch/um/drivers/hostaudio_kern.c
@@ -8,6 +8,7 @@
#include "linux/slab.h"
#include "linux/sound.h"
#include "linux/soundcard.h"
+#include "linux/smp_lock.h"
#include "asm/uaccess.h"
#include "init.h"
#include "os.h"
@@ -198,7 +199,10 @@ static int hostaudio_open(struct inode *inode, struct file *file)
if (file->f_mode & FMODE_WRITE)
w = 1;
+ lock_kernel();
ret = os_open_file(dsp, of_set_rw(OPENFLAGS(), r, w), 0);
+ unlock_kernel();
+
if (ret < 0) {
kfree(state);
return ret;
@@ -254,7 +258,9 @@ static int hostmixer_open_mixdev(struct inode *inode, struct file *file)
if (file->f_mode & FMODE_WRITE)
w = 1;
+ lock_kernel();
ret = os_open_file(mixer, of_set_rw(OPENFLAGS(), r, w), 0);
+ unlock_kernel();
if (ret < 0) {
printk(KERN_ERR "hostaudio_open_mixdev failed to open '%s', "