b43legacy: Release mutex in error handling code

From: Julia Lawall <[email protected]>

The mutex is released on a successful return, so it would seem that it should be released on an error return as well.

The semantic patch finds this problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@
expression l;
@@

mutex_lock(l);
... when != mutex_unlock(l)
when any
when strict
(
if (...) { ... when != mutex_unlock(l)

+   mutex_unlock(l);
    return ...;
}

|
mutex_unlock(l);
)
// </smpl>

---

John, please apply this bugfix to the next bugfix release.

diff -u -p a/drivers/net/wireless/b43legacy/main.c b/drivers/net/wireless/b43legacy/main.c
@@ -3862,10 +3862,10 @@ static int b43legacy_resume(struct ssb_d
 			goto out;
 		}
 	}
-	mutex_unlock(&wl->mutex);
 
 	b43legacydbg(wl, "Device resumed.\n");
 out:
+	mutex_unlock(&wl->mutex);
 	return err;
 }
 

Greetings Michael.