netxen: stop second phy correctly

This patch fixes bug that doesn't quiesce second port when interface is
brought down, which could lead to unwarranted interrupt during rmmod /
ifdown.

Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/netxen/netxen_nic_niu.c b/drivers/net/netxen/netxen_nic_niu.c
index 5b9e1b3..d04ecb7 100644
--- a/drivers/net/netxen/netxen_nic_niu.c
+++ b/drivers/net/netxen/netxen_nic_niu.c
@@ -736,12 +736,12 @@
 	__u32 mac_cfg;
 	u32 port = physical_port[adapter->portnum];
 
-	if (port != 0)
+	if (port > NETXEN_NIU_MAX_XG_PORTS)
 		return -EINVAL;
+
 	mac_cfg = 0;
-	netxen_xg_soft_reset(mac_cfg);
-	if (netxen_nic_hw_write_wx(adapter, NETXEN_NIU_XGE_CONFIG_0,
-				   &mac_cfg, 4))
+	if (netxen_nic_hw_write_wx(adapter,
+		NETXEN_NIU_XGE_CONFIG_0 + (0x10000 * port), &mac_cfg, 4))
 		return -EIO;
 	return 0;
 }