[SPARC] Videopix Frame Grabber: Fix unreleased lock in vfc_debug()

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>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/sbus/char/vfc_dev.c b/drivers/sbus/char/vfc_dev.c
index 26b1d2a17ed2..9269f7fbd363 100644
--- a/drivers/sbus/char/vfc_dev.c
+++ b/drivers/sbus/char/vfc_dev.c
@@ -248,6 +248,7 @@ static int vfc_debug(struct vfc_dev *dev, int cmd, void __user *argp)
                                         buffer,inout.len);
 
                 if (copy_to_user(argp,&inout,sizeof(inout))) {
+                        vfc_unlock_device(dev);
                         kfree(buffer);
                         return -EFAULT;
                 }