[PATCH] fix "pcmcia: fix 'rmmod pcmcia' with unbound devices"

Add required locking to dfbc9e9dSigned-off-by: NDaniel Ritz <daniel.ritz@gmx.ch>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Pavol Gono <Palo.Gono@gmail.com>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

drivers/pcmcia/ds.c

@@ -1272,7 +1272,9 @@ static void pcmcia_bus_remove_socket(struct class_device *class_dev,
 	pccard_register_pcmcia(socket, NULL);
 
 	/* unregister any unbound devices */
+	mutex_lock(&socket->skt_mutex);
 	pcmcia_card_remove(socket, NULL);
+	mutex_unlock(&socket->skt_mutex);
 
 	pcmcia_put_socket(socket);