ixgbe: Ensure MAC filter was added before setting MACVLAN

This patch adds a check to ensure that adding the MAC filter was
successful before setting the MACVLAN.  If it was unsuccessful, propagate
the error.

Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

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

@@ -679,8 +679,9 @@ update_vlvfb:
 static int ixgbe_set_vf_macvlan(struct ixgbe_adapter *adapter,
 				int vf, int index, unsigned char *mac_addr)
 {
-	struct list_head *pos;
 	struct vf_macvlans *entry;
+	struct list_head *pos;
+	int retval = 0;
 
 	if (index <= 1) {
 		list_for_each(pos, &adapter->vf_mvs.l) {
@@ -721,13 +722,15 @@ static int ixgbe_set_vf_macvlan(struct ixgbe_adapter *adapter,
 	if (!entry || !entry->free)
 		return -ENOSPC;
 
+	retval = ixgbe_add_mac_filter(adapter, mac_addr, vf);
+	if (retval < 0)
+		return retval;
+
 	entry->free = false;
 	entry->is_macvlan = true;
 	entry->vf = vf;
 	memcpy(entry->vf_macvlan, mac_addr, ETH_ALEN);
 
-	ixgbe_add_mac_filter(adapter, mac_addr, vf);
-
 	return 0;
 }