We recently changed the locking in this function, but this return was
missed.  It needs an unlock and the IRQs need to be restored.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Acked-by: NBrian King <brking@linux.vnet.ibm.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>