ehea: set mac address fix

eHEA has to call firmware functions in order to change the mac address
of a logical port. This patch checks if the logical port is up
when calling the register / deregister mac address calls. If the port
is down these firmware calls would fail and are therefore not executed.
Signed-off-by: Jan-Bernd Themann <themann@de.ibm.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/net/ehea/ehea_main.c

@@ -1766,16 +1766,20 @@ static int ehea_set_mac_addr(struct net_device *dev, void *sa)
 	mutex_lock(&ehea_bcmc_regs.lock);
 
 	/* Deregister old MAC in pHYP */
+	if (port->state == EHEA_PORT_UP) {
 		ret = ehea_broadcast_reg_helper(port, H_DEREG_BCMC);
 		if (ret)
 			goto out_upregs;
+	}
 
 	port->mac_addr = cb0->port_mac_addr << 16;
 
 	/* Register new MAC in pHYP */
+	if (port->state == EHEA_PORT_UP) {
 		ret = ehea_broadcast_reg_helper(port, H_REG_BCMC);
 		if (ret)
 			goto out_upregs;
+	}
 
 	ret = 0;