commit cc967be54710d97c05229b2e5ba2d00df84ddd64
author Julia Lawall <julia@diku.dk> Wed May 26 17:54:39 2010 +0200
committer Al Viro <viro@zeniv.linux.org.uk> Thu May 27 22:03:09 2010 -0400
tree f2b5f79ee07f16abe92f27c6663dea4339d2f437
parent ea635c64e007061f6468ece5cc9cc62d41d4ecf2

fs: Add missing mutex_unlock

Add a mutex_unlock missing on the error path.  At other exists from the
function that return an error flag, the mutex is unlocked, so do the same
here.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression E1;
@@

* mutex_lock(E1,...);
  <+... when != E1
  if (...) {
    ... when != E1
*   return ...;
  }
  ...+>
* mutex_unlock(E1,...);
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>