qlcnic: Optimize ring count validations

- Check interrupt mode at the start of qlcnic_set_channels().
- Do not validate ring count if they are not going to change.
Signed-off-by: NShahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c

@@ -726,6 +726,11 @@ static int qlcnic_set_channels(struct net_device *dev,
 	struct qlcnic_adapter *adapter = netdev_priv(dev);
 	int err;
 
+	if (!(adapter->flags & QLCNIC_MSIX_ENABLED)) {
+		netdev_err(dev, "No RSS/TSS support in non MSI-X mode\n");
+		return -EINVAL;
+	}
+
 	if (channel->other_count || channel->combined_count)
 		return -EINVAL;
 
@@ -734,7 +739,7 @@ static int qlcnic_set_channels(struct net_device *dev,
 	if (err)
 		return err;
 
-	if (channel->rx_count) {
+	if (adapter->drv_sds_rings != channel->rx_count) {
 		err = qlcnic_validate_rings(adapter, channel->rx_count,
 					    QLCNIC_RX_QUEUE);
 		if (err) {
@@ -745,7 +750,7 @@ static int qlcnic_set_channels(struct net_device *dev,
 		adapter->drv_rss_rings = channel->rx_count;
 	}
 
-	if (channel->tx_count) {
+	if (adapter->drv_tx_rings != channel->tx_count) {
 		err = qlcnic_validate_rings(adapter, channel->tx_count,
 					    QLCNIC_TX_QUEUE);
 		if (err) {

drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c

@@ -4003,16 +4003,6 @@ int qlcnic_validate_rings(struct qlcnic_adapter *adapter, __u32 ring_cnt,
 		strcpy(buf, "Tx");
 	}
 
-	if (!QLCNIC_IS_MSI_FAMILY(adapter)) {
-		netdev_err(netdev, "No RSS/TSS support in INT-x mode\n");
-		return -EINVAL;
-	}
-
-	if (adapter->flags & QLCNIC_MSI_ENABLED) {
-		netdev_err(netdev, "No RSS/TSS support in MSI mode\n");
-		return -EINVAL;
-	}
-
 	if (!is_power_of_2(ring_cnt)) {
 		netdev_err(netdev, "%s rings value should be a power of 2\n",
 			   buf);