[PATCH] err2-25: dvb_register_i2c_bus() locking fix

Found by the Stanford locking checker.
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/media/dvb/dvb-core/dvb_i2c.c

@@ -191,8 +191,10 @@ dvb_register_i2c_bus (int (*xfer) (struct dvb_i2c_bus *i2c,
 	if (down_interruptible (&dvb_i2c_mutex))
 		return NULL;
 
-	if (!(i2c = kmalloc (sizeof (struct dvb_i2c_bus), GFP_KERNEL)))
+	if (!(i2c = kmalloc (sizeof (struct dvb_i2c_bus), GFP_KERNEL))) {
+		up (&dvb_i2c_mutex);
 		return NULL;
+	}
 
 	INIT_LIST_HEAD(&i2c->list_head);
 	INIT_LIST_HEAD(&i2c->client_list);