diff options
Diffstat (limited to 'drivers/usb/image/mdc800.c')
| -rw-r--r-- | drivers/usb/image/mdc800.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/image/mdc800.c b/drivers/usb/image/mdc800.c index e192e8f7c560..dce4f7b69ac3 100644 --- a/drivers/usb/image/mdc800.c +++ b/drivers/usb/image/mdc800.c @@ -96,6 +96,7 @@ #include <linux/module.h> #include <linux/wait.h> #include <linux/mutex.h> +#include <linux/smp_lock.h> #include <linux/usb.h> #include <linux/fs.h> @@ -622,6 +623,7 @@ static int mdc800_device_open (struct inode* inode, struct file *file) int retval=0; int errn=0; + lock_kernel(); mutex_lock(&mdc800->io_lock); if (mdc800->state == NOT_CONNECTED) @@ -660,6 +662,7 @@ static int mdc800_device_open (struct inode* inode, struct file *file) error_out: mutex_unlock(&mdc800->io_lock); + unlock_kernel(); return errn; } |