ionic: use lif ident for filter count

Use the lif's ident information for the uc and mc filter
counts rather than the ionic's version, to be sure
we're getting the info that is specific to this lif.

While we're thinking about it, add some missing error
checking where we get the lif's identity information.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/pensando/ionic/ionic_lif.c

@@ -1022,7 +1022,6 @@ static int ionic_lif_addr_del(struct ionic_lif *lif, const u8 *addr)
 static int ionic_lif_addr(struct ionic_lif *lif, const u8 *addr, bool add,
 			  bool can_sleep)
 {
-	struct ionic *ionic = lif->ionic;
 	struct ionic_deferred_work *work;
 	unsigned int nmfilters;
 	unsigned int nufilters;
@@ -1032,8 +1031,8 @@ static int ionic_lif_addr(struct ionic_lif *lif, const u8 *addr, bool add,
 		 * here before checking the need for deferral so that we
 		 * can return an overflow error to the stack.
 		 */
-		nmfilters = le32_to_cpu(ionic->ident.lif.eth.max_mcast_filters);
-		nufilters = le32_to_cpu(ionic->ident.lif.eth.max_ucast_filters);
+		nmfilters = le32_to_cpu(lif->identity->eth.max_mcast_filters);
+		nufilters = le32_to_cpu(lif->identity->eth.max_ucast_filters);
 
 		if ((is_multicast_ether_addr(addr) && lif->nmcast < nmfilters))
 			lif->nmcast++;
@@ -1162,12 +1161,9 @@ static void ionic_dev_uc_sync(struct net_device *netdev, bool from_ndo)
 static void ionic_set_rx_mode(struct net_device *netdev, bool from_ndo)
 {
 	struct ionic_lif *lif = netdev_priv(netdev);
-	struct ionic_identity *ident;
 	unsigned int nfilters;
 	unsigned int rx_mode;
 
-	ident = &lif->ionic->ident;
-
 	rx_mode = IONIC_RX_MODE_F_UNICAST;
 	rx_mode |= (netdev->flags & IFF_MULTICAST) ? IONIC_RX_MODE_F_MULTICAST : 0;
 	rx_mode |= (netdev->flags & IFF_BROADCAST) ? IONIC_RX_MODE_F_BROADCAST : 0;
@@ -1182,7 +1178,7 @@ static void ionic_set_rx_mode(struct net_device *netdev, bool from_ndo)
 	 *       to see if we can disable NIC PROMISC
 	 */
 	ionic_dev_uc_sync(netdev, from_ndo);
-	nfilters = le32_to_cpu(ident->lif.eth.max_ucast_filters);
+	nfilters = le32_to_cpu(lif->identity->eth.max_ucast_filters);
 	if (netdev_uc_count(netdev) + 1 > nfilters) {
 		rx_mode |= IONIC_RX_MODE_F_PROMISC;
 		lif->uc_overflow = true;
@@ -1194,7 +1190,7 @@ static void ionic_set_rx_mode(struct net_device *netdev, bool from_ndo)
 
 	/* same for multicast */
 	ionic_dev_uc_sync(netdev, from_ndo);
-	nfilters = le32_to_cpu(ident->lif.eth.max_mcast_filters);
+	nfilters = le32_to_cpu(lif->identity->eth.max_mcast_filters);
 	if (netdev_mc_count(netdev) > nfilters) {
 		rx_mode |= IONIC_RX_MODE_F_ALLMULTI;
 		lif->mc_overflow = true;
@@ -2425,7 +2421,12 @@ int ionic_lif_alloc(struct ionic *ionic)
 
 	lif->identity = lid;
 	lif->lif_type = IONIC_LIF_TYPE_CLASSIC;
-	ionic_lif_identify(ionic, lif->lif_type, lif->identity);
+	err = ionic_lif_identify(ionic, lif->lif_type, lif->identity);
+	if (err) {
+		dev_err(ionic->dev, "Cannot identify type %d: %d\n",
+			lif->lif_type, err);
+		goto err_out_free_netdev;
+	}
 	lif->netdev->min_mtu = max_t(unsigned int, ETH_MIN_MTU,
 				     le32_to_cpu(lif->identity->eth.min_frame_size));
 	lif->netdev->max_mtu =