drivers/net: fix comparisons of unsigned < 0

Recent gcc versions emit warnings when unsigned variables are compared < 0 or >= 0.
Signed-off-by: Bill Nottingham <notting@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/mlx4/qp.c

@@ -113,8 +113,7 @@ int mlx4_qp_modify(struct mlx4_dev *dev, struct mlx4_mtt *mtt,
 	struct mlx4_cmd_mailbox *mailbox;
 	int ret = 0;
 
-	if (cur_state < 0 || cur_state >= MLX4_QP_NUM_STATE ||
-	    new_state < 0 || cur_state >= MLX4_QP_NUM_STATE ||
+	if (cur_state >= MLX4_QP_NUM_STATE || cur_state >= MLX4_QP_NUM_STATE ||
 	    !op[cur_state][new_state])
 		return -EINVAL;
 

drivers/net/netxen/netxen_nic_niu.c

@@ -724,7 +724,7 @@ int netxen_niu_disable_gbe_port(struct netxen_adapter *adapter)
 	__u32 mac_cfg0;
 	u32 port = physical_port[adapter->portnum];
 
-	if ((port < 0) || (port > NETXEN_NIU_MAX_GBE_PORTS))
+	if (port > NETXEN_NIU_MAX_GBE_PORTS)
 		return -EINVAL;
 	mac_cfg0 = 0;
 	netxen_gb_soft_reset(mac_cfg0);
@@ -757,7 +757,7 @@ int netxen_niu_set_promiscuous_mode(struct netxen_adapter *adapter,
 	__u32 reg;
 	u32 port = physical_port[adapter->portnum];
 
-	if ((port < 0) || (port > NETXEN_NIU_MAX_GBE_PORTS))
+	if (port > NETXEN_NIU_MAX_GBE_PORTS)
 		return -EINVAL;
 
 	/* save previous contents */
@@ -894,7 +894,7 @@ int netxen_niu_xg_set_promiscuous_mode(struct netxen_adapter *adapter,
 	__u32 reg;
 	u32 port = physical_port[adapter->portnum];
 
-	if ((port < 0) || (port > NETXEN_NIU_MAX_XG_PORTS))
+	if (port > NETXEN_NIU_MAX_XG_PORTS)
 		return -EINVAL;
 
 	if (netxen_nic_hw_read_wx(adapter,

drivers/net/tulip/de2104x.c

@@ -785,7 +785,6 @@ static void __de_set_rx_mode (struct net_device *dev)
 
 	de->tx_head = NEXT_TX(entry);
 
-	BUG_ON(TX_BUFFS_AVAIL(de) < 0);
 	if (TX_BUFFS_AVAIL(de) == 0)
 		netif_stop_queue(dev);