netdev: ehea: port_lock semaphore to mutex

Convert the port_lock to a mutex.  There is also some additional cleanup.  The
line length inside the ehea_rereg_mrs was getting long so I made some
adjustments to shorten them.

[akpm@linux-foundation.org: dec99ification]
Signed-off-by: Daniel Walker <dwalker@mvista.com>
Cc: Christoph Raisch <raisch@de.ibm.com>
Cc: Jan-Bernd Themann <themann@de.ibm.com>
Cc: Thomas Klein <tklein@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/ehea/ehea.h

@@ -452,7 +452,7 @@ struct ehea_port {
 	struct vlan_group *vgrp;
 	struct ehea_eq *qp_eq;
 	struct work_struct reset_task;
-	struct semaphore port_lock;
+	struct mutex port_lock;
 	char int_aff_name[EHEA_IRQ_NAME_SIZE];
 	int allmulti;			 /* Indicates IFF_ALLMULTI state */
 	int promisc;		 	 /* Indicates IFF_PROMISC state */

drivers/net/ehea/ehea_main.c

@@ -2543,7 +2543,7 @@ static int ehea_open(struct net_device *dev)
 	int ret;
 	struct ehea_port *port = netdev_priv(dev);
 
-	down(&port->port_lock);
+	mutex_lock(&port->port_lock);
 
 	if (netif_msg_ifup(port))
 		ehea_info("enabling port %s", dev->name);
@@ -2554,7 +2554,7 @@ static int ehea_open(struct net_device *dev)
 		netif_start_queue(dev);
 	}
 
-	up(&port->port_lock);
+	mutex_unlock(&port->port_lock);
 
 	return ret;
 }
@@ -2600,11 +2600,11 @@ static int ehea_stop(struct net_device *dev)
 		ehea_info("disabling port %s", dev->name);
 
 	flush_scheduled_work();
-	down(&port->port_lock);
+	mutex_lock(&port->port_lock);
 	netif_stop_queue(dev);
 	port_napi_disable(port);
 	ret = ehea_down(dev);
-	up(&port->port_lock);
+	mutex_unlock(&port->port_lock);
 	return ret;
 }
 
@@ -2802,7 +2802,7 @@ static void ehea_reset_port(struct work_struct *work)
 	struct net_device *dev = port->netdev;
 
 	port->resets++;
-	down(&port->port_lock);
+	mutex_lock(&port->port_lock);
 	netif_stop_queue(dev);
 
 	port_napi_disable(port);
@@ -2822,7 +2822,7 @@ static void ehea_reset_port(struct work_struct *work)
 
 	netif_wake_queue(dev);
 out:
-	up(&port->port_lock);
+	mutex_unlock(&port->port_lock);
 	return;
 }
 
@@ -2839,21 +2839,23 @@ static void ehea_rereg_mrs(struct work_struct *work)
 			/* Shutdown all ports */
 			for (i = 0; i < EHEA_MAX_PORTS; i++) {
 				struct ehea_port *port = adapter->port[i];
+				struct net_device *dev;
 
-				if (port) {
-					struct net_device *dev = port->netdev;
+				if (!port)
+					continue;
+
+				dev = port->netdev;
 
 				if (dev->flags & IFF_UP) {
-						down(&port->port_lock);
+					mutex_lock(&port->port_lock);
 					netif_stop_queue(dev);
 					ret = ehea_stop_qps(dev);
 					if (ret) {
-							up(&port->port_lock);
+						mutex_unlock(&port->port_lock);
 						goto out;
 					}
 					port_napi_disable(port);
-						up(&port->port_lock);
-					}
+					mutex_unlock(&port->port_lock);
 				}
 			}
 
@@ -2893,12 +2895,12 @@ static void ehea_rereg_mrs(struct work_struct *work)
 					struct net_device *dev = port->netdev;
 
 					if (dev->flags & IFF_UP) {
-						down(&port->port_lock);
+						mutex_lock(&port->port_lock);
 						port_napi_enable(port);
 						ret = ehea_restart_qps(dev);
 						if (!ret)
 							netif_wake_queue(dev);
-						up(&port->port_lock);
+						mutex_unlock(&port->port_lock);
 					}
 				}
 			}
@@ -3064,7 +3066,7 @@ struct ehea_port *ehea_setup_single_port(struct ehea_adapter *adapter,
 
 	port = netdev_priv(dev);
 
-	sema_init(&port->port_lock, 1);
+	mutex_init(&port->port_lock);
 	port->state = EHEA_PORT_DOWN;
 	port->sig_comp_iv = sq_entries / 10;