bnx2x: Fix generic option settings

When user tried to change generic options using "ethtool -s" command, while SFP
module is plugged out or during module detection, the command would have failed
with "Unsupported port type" message. The fix is to ignore the port option in
case it's same as the current port configuration.
Signed-off-by: Yaniv Rosner <yanivr@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c

@@ -358,49 +358,47 @@ static int bnx2x_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 
 	cfg_idx = bnx2x_get_link_cfg_idx(bp);
 	old_multi_phy_config = bp->link_params.multi_phy_config;
-	switch (cmd->port) {
-	case PORT_TP:
-		if (bp->port.supported[cfg_idx] & SUPPORTED_TP)
-			break; /* no port change */
-
-		if (!(bp->port.supported[0] & SUPPORTED_TP ||
-		      bp->port.supported[1] & SUPPORTED_TP)) {
-			DP(BNX2X_MSG_ETHTOOL, "Unsupported port type\n");
-			return -EINVAL;
-		}
-		bp->link_params.multi_phy_config &=
-			~PORT_HW_CFG_PHY_SELECTION_MASK;
-		if (bp->link_params.multi_phy_config &
-		    PORT_HW_CFG_PHY_SWAPPED_ENABLED)
-			bp->link_params.multi_phy_config |=
-			PORT_HW_CFG_PHY_SELECTION_SECOND_PHY;
-		else
-			bp->link_params.multi_phy_config |=
-			PORT_HW_CFG_PHY_SELECTION_FIRST_PHY;
-		break;
-	case PORT_FIBRE:
-	case PORT_DA:
-		if (bp->port.supported[cfg_idx] & SUPPORTED_FIBRE)
-			break; /* no port change */
-
-		if (!(bp->port.supported[0] & SUPPORTED_FIBRE ||
-		      bp->port.supported[1] & SUPPORTED_FIBRE)) {
+	if (cmd->port != bnx2x_get_port_type(bp)) {
+		switch (cmd->port) {
+		case PORT_TP:
+			if (!(bp->port.supported[0] & SUPPORTED_TP ||
+			      bp->port.supported[1] & SUPPORTED_TP)) {
+				DP(BNX2X_MSG_ETHTOOL,
+				   "Unsupported port type\n");
+				return -EINVAL;
+			}
+			bp->link_params.multi_phy_config &=
+				~PORT_HW_CFG_PHY_SELECTION_MASK;
+			if (bp->link_params.multi_phy_config &
+			    PORT_HW_CFG_PHY_SWAPPED_ENABLED)
+				bp->link_params.multi_phy_config |=
+				PORT_HW_CFG_PHY_SELECTION_SECOND_PHY;
+			else
+				bp->link_params.multi_phy_config |=
+				PORT_HW_CFG_PHY_SELECTION_FIRST_PHY;
+			break;
+		case PORT_FIBRE:
+		case PORT_DA:
+			if (!(bp->port.supported[0] & SUPPORTED_FIBRE ||
+			      bp->port.supported[1] & SUPPORTED_FIBRE)) {
+				DP(BNX2X_MSG_ETHTOOL,
+				   "Unsupported port type\n");
+				return -EINVAL;
+			}
+			bp->link_params.multi_phy_config &=
+				~PORT_HW_CFG_PHY_SELECTION_MASK;
+			if (bp->link_params.multi_phy_config &
+			    PORT_HW_CFG_PHY_SWAPPED_ENABLED)
+				bp->link_params.multi_phy_config |=
+				PORT_HW_CFG_PHY_SELECTION_FIRST_PHY;
+			else
+				bp->link_params.multi_phy_config |=
+				PORT_HW_CFG_PHY_SELECTION_SECOND_PHY;
+			break;
+		default:
 			DP(BNX2X_MSG_ETHTOOL, "Unsupported port type\n");
 			return -EINVAL;
 		}
-		bp->link_params.multi_phy_config &=
-			~PORT_HW_CFG_PHY_SELECTION_MASK;
-		if (bp->link_params.multi_phy_config &
-		    PORT_HW_CFG_PHY_SWAPPED_ENABLED)
-			bp->link_params.multi_phy_config |=
-			PORT_HW_CFG_PHY_SELECTION_FIRST_PHY;
-		else
-			bp->link_params.multi_phy_config |=
-			PORT_HW_CFG_PHY_SELECTION_SECOND_PHY;
-		break;
-	default:
-		DP(BNX2X_MSG_ETHTOOL, "Unsupported port type\n");
-		return -EINVAL;
 	}
 	/* Save new config in case command complete successfully */
 	new_multi_phy_config = bp->link_params.multi_phy_config;