qeth: remove locks from sysfs _show

Locking is probably unnecessary in this case, and the rest of the
qeth sysfs code does not use locks in the *_show() functions.
Remove locks from the layer2 *_show() functions in which they where
accidentally introduced.

Signed-off-by: Eugene Crosser <[e-mail]>
Signed-off-by: Ursula Braun <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/s390/net/qeth_l2_sys.c

···
 	if (!card)
 		return -EINVAL;
 
-	mutex_lock(&card->conf_mutex);
-
 	if (qeth_card_hw_is_reachable(card) &&
 					card->options.sbp.supported_funcs)
 		rc = qeth_bridgeport_query_ports(card,
···
 		else
 			rc = sprintf(buf, "%s\n", word);
 	}
-
-	mutex_unlock(&card->conf_mutex);
 
 	return rc;
 }
···
 	if (!card)
 		return -EINVAL;
 
-	mutex_lock(&card->conf_mutex);
-
 	enabled = card->options.sbp.hostnotification;
-
-	mutex_unlock(&card->conf_mutex);
 
 	return sprintf(buf, "%d\n", enabled);
 }