1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/media/video/se401.c b/drivers/media/video/se401.c
index acceed5d04ae..d16bbf0d2783 100644
--- a/drivers/media/video/se401.c
+++ b/drivers/media/video/se401.c
@@ -936,14 +936,18 @@ static int se401_open(struct inode *inode, struct file *file)
         struct usb_se401 *se401 = (struct usb_se401 *)dev;
         int err = 0;
 
-        if (se401->user)
+        lock_kernel();
+        if (se401->user) {
+                unlock_kernel();
                 return -EBUSY;
+        }
         se401->fbuf = rvmalloc(se401->maxframesize * SE401_NUMFRAMES);
         if (se401->fbuf)
                 file->private_data = dev;
         else
                 err = -ENOMEM;
         se401->user = !err;
+        unlock_kernel();
 
         return err;
 }