[SCSI] scsi_scan.c: 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 that makes this change 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: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Julia Lawall 2008-07-21 09:58:30 +02:00 committed by James Bottomley
parent 12265709ac
commit 773e82f6cd

View file

@ -1760,6 +1760,7 @@ static void scsi_finish_async_scan(struct async_scan_data *data)
printk("%s called twice for host %d", __FUNCTION__,
shost->host_no);
dump_stack();
mutex_unlock(&shost->scan_mutex);
return;
}