b43legacy: Release mutex in error handling code
authorJulia Lawall <julia@diku.dk>
Mon, 21 Jul 2008 09:29:34 +0000 (11:29 +0200)
committerJohn W. Linville <linville@tuxdriver.com>
Tue, 29 Jul 2008 20:55:05 +0000 (16:55 -0400)
commit4104863fb4a724723d1d5f3cba9d3c5084087e45
tree33057dc360a472cb464a699e15fc94b9be329821
parent80c42affad970c8ebc5ebec4681aef8dadf21c32
b43legacy: Release mutex in error handling code

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>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Cc: stable <stable@kernel.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
drivers/net/wireless/b43legacy/main.c