ixgbe: fix return values and memcpy parameters to eliminate Smatch warnings

This patch removes the rval variable returns from function and replaces
them with direct returns in ixgbe_dcbnl_getnumtcs. It also changes how
ixgbe_gstrings_test is copied into data with memcpy in ixgbe_get_strings
because "*ixgbe_gstrings_test too small (32 vs 160)".

Signed-off-by: Josh Hay <joshua.a.hay@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ixgbe/ixgbe_dcb_nl.c

@@ -449,7 +449,6 @@ static u8 ixgbe_dcbnl_getcap(struct net_device *netdev, int capid, u8 *cap)
 static int ixgbe_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
 {
 	struct ixgbe_adapter *adapter = netdev_priv(netdev);
-	u8 rval = 0;
 
 	if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
 		switch (tcid) {
@@ -460,14 +459,14 @@ static int ixgbe_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
 			*num = adapter->dcb_cfg.num_tcs.pfc_tcs;
 			break;
 		default:
-			rval = -EINVAL;
+			return -EINVAL;
 			break;
 		}
 	} else {
-		rval = -EINVAL;
+		return -EINVAL;
 	}
 
-	return rval;
+	return 0;
 }
 
 static int ixgbe_dcbnl_setnumtcs(struct net_device *netdev, int tcid, u8 num)

drivers/net/ethernet/intel/ixgbe/ixgbe_ethtool.c

@@ -1099,8 +1099,10 @@ static void ixgbe_get_strings(struct net_device *netdev, u32 stringset,
 
 	switch (stringset) {
 	case ETH_SS_TEST:
-		memcpy(data, *ixgbe_gstrings_test,
-		       IXGBE_TEST_LEN * ETH_GSTRING_LEN);
+		for (i = 0; i < IXGBE_TEST_LEN; i++) {
+			memcpy(data, ixgbe_gstrings_test[i], ETH_GSTRING_LEN);
+			data += ETH_GSTRING_LEN;
+		}
 		break;
 	case ETH_SS_STATS:
 		for (i = 0; i < IXGBE_GLOBAL_STATS_LEN; i++) {