From: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>

Videopix Frame Grabber: vfc_debug() doesn't release the device lock
when copy_from_user() fails

Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/sbus/char/vfc_dev.c |    1 +
 1 files changed, 1 insertion(+)

diff -puN drivers/sbus/char/vfc_dev.c~videopix-frame-grabber-fix-unreleased-lock-in-vfc_debug drivers/sbus/char/vfc_dev.c
--- a/drivers/sbus/char/vfc_dev.c~videopix-frame-grabber-fix-unreleased-lock-in-vfc_debug
+++ a/drivers/sbus/char/vfc_dev.c
@@ -248,6 +248,7 @@ static int vfc_debug(struct vfc_dev *dev
 					buffer,inout.len);
 
 		if (copy_to_user(argp,&inout,sizeof(inout))) {
+			vfc_unlock_device(dev);
 			kfree(buffer);
 			return -EFAULT;
 		}
_