diff options
Diffstat (limited to 'drivers/media/video/videodev.c')
| -rw-r--r-- | drivers/media/video/videodev.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/media/video/videodev.c b/drivers/media/video/videodev.c index 67a661c..7649860 100644 --- a/drivers/media/video/videodev.c +++ b/drivers/media/video/videodev.c @@ -36,6 +36,7 @@ #include <linux/init.h> #include <linux/kmod.h> #include <linux/slab.h> +#include <linux/smp_lock.h> #include <asm/uaccess.h> #include <asm/system.h> @@ -442,6 +443,7 @@ static int video_open(struct inode *inode, struct file *file) if(minor>=VIDEO_NUM_DEVICES) return -ENODEV; + lock_kernel(); mutex_lock(&videodev_lock); vfl=video_device[minor]; if(vfl==NULL) { @@ -451,6 +453,7 @@ static int video_open(struct inode *inode, struct file *file) vfl=video_device[minor]; if (vfl==NULL) { mutex_unlock(&videodev_lock); + unlock_kernel(); return -ENODEV; } } @@ -464,6 +467,7 @@ static int video_open(struct inode *inode, struct file *file) } fops_put(old_fops); mutex_unlock(&videodev_lock); + unlock_kernel(); return err; } |
