Merge tag 'mlx5-fixes-2019-01-18' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
Mellanox, mlx5 fixes 2019-01-18

This series introduces some fixes to mlx5 driver.

Please pull and let me know if there is any problem.

For -stable v4.18
('net/mlx5e: Force CHECKSUM_UNNECESSARY for short ethernet frames')

The patch doesn't apply cleanly to 4.18.y, but it is very simple to
resolve, what should be the procedure here ?
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 34 insertions, 14 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
index c9df08133718..3bbccead2f63 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c
@@ -844,9 +844,12 @@ int mlx5e_ethtool_get_link_ksettings(struct mlx5e_priv *priv,
 	ethtool_link_ksettings_add_link_mode(link_ksettings, supported,
 					     Autoneg);
 
-	if (get_fec_supported_advertised(mdev, link_ksettings))
+	err = get_fec_supported_advertised(mdev, link_ksettings);
+	if (err) {
 		netdev_dbg(priv->netdev, "%s: FEC caps query failed: %d\n",
 			   __func__, err);
+		err = 0; /* don't fail caps query because of FEC error */
+	}
 
 	if (!an_disable_admin)
 		ethtool_link_ksettings_add_link_mode(link_ksettings,
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
index 96cc0c6a4014..04736212a21c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rep.c
@@ -58,7 +58,8 @@ struct mlx5e_rep_indr_block_priv {
 	struct list_head list;
 };
 
-static void mlx5e_rep_indr_unregister_block(struct net_device *netdev);
+static void mlx5e_rep_indr_unregister_block(struct mlx5e_rep_priv *rpriv,
+					    struct net_device *netdev);
 
 static void mlx5e_rep_get_drvinfo(struct net_device *dev,
 				  struct ethtool_drvinfo *drvinfo)
@@ -179,6 +180,7 @@ static void mlx5e_rep_update_sw_counters(struct mlx5e_priv *priv)
 
 			s->tx_packets		+= sq_stats->packets;
 			s->tx_bytes		+= sq_stats->bytes;
+			s->tx_queue_dropped	+= sq_stats->dropped;
 		}
 	}
 }
@@ -663,7 +665,7 @@ static void mlx5e_rep_indr_clean_block_privs(struct mlx5e_rep_priv *rpriv)
 	struct list_head *head = &rpriv->uplink_priv.tc_indr_block_priv_list;
 
 	list_for_each_entry_safe(cb_priv, temp, head, list) {
-		mlx5e_rep_indr_unregister_block(cb_priv->netdev);
+		mlx5e_rep_indr_unregister_block(rpriv, cb_priv->netdev);
 		kfree(cb_priv);
 	}
 }
@@ -735,7 +737,7 @@ mlx5e_rep_indr_setup_tc_block(struct net_device *netdev,
 
 		err = tcf_block_cb_register(f->block,
 					    mlx5e_rep_indr_setup_block_cb,
-					    netdev, indr_priv, f->extack);
+					    indr_priv, indr_priv, f->extack);
 		if (err) {
 			list_del(&indr_priv->list);
 			kfree(indr_priv);
@@ -743,14 +745,15 @@ mlx5e_rep_indr_setup_tc_block(struct net_device *netdev,
 
 		return err;
 	case TC_BLOCK_UNBIND:
+		indr_priv = mlx5e_rep_indr_block_priv_lookup(rpriv, netdev);
+		if (!indr_priv)
+			return -ENOENT;
+
 		tcf_block_cb_unregister(f->block,
 					mlx5e_rep_indr_setup_block_cb,
-					netdev);
-		indr_priv = mlx5e_rep_indr_block_priv_lookup(rpriv, netdev);
-		if (indr_priv) {
-			list_del(&indr_priv->list);
-			kfree(indr_priv);
-		}
+					indr_priv);
+		list_del(&indr_priv->list);
+		kfree(indr_priv);
 
 		return 0;
 	default:
@@ -779,7 +782,7 @@ static int mlx5e_rep_indr_register_block(struct mlx5e_rep_priv *rpriv,
 
 	err = __tc_indr_block_cb_register(netdev, rpriv,
 					  mlx5e_rep_indr_setup_tc_cb,
-					  netdev);
+					  rpriv);
 	if (err) {
 		struct mlx5e_priv *priv = netdev_priv(rpriv->netdev);
 
@@ -789,10 +792,11 @@ static int mlx5e_rep_indr_register_block(struct mlx5e_rep_priv *rpriv,
 	return err;
 }
 
-static void mlx5e_rep_indr_unregister_block(struct net_device *netdev)
+static void mlx5e_rep_indr_unregister_block(struct mlx5e_rep_priv *rpriv,
+					    struct net_device *netdev)
 {
 	__tc_indr_block_cb_unregister(netdev, mlx5e_rep_indr_setup_tc_cb,
-				      netdev);
+				      rpriv);
 }
 
 static int mlx5e_nic_rep_netdevice_event(struct notifier_block *nb,
@@ -811,7 +815,7 @@ static int mlx5e_nic_rep_netdevice_event(struct notifier_block *nb,
 		mlx5e_rep_indr_register_block(rpriv, netdev);
 		break;
 	case NETDEV_UNREGISTER:
-		mlx5e_rep_indr_unregister_block(netdev);
+		mlx5e_rep_indr_unregister_block(rpriv, netdev);
 		break;
 	}
 	return NOTIFY_OK;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index 1d0bb5ff8c26..f86e4804e83e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -732,6 +732,8 @@ static u8 get_ip_proto(struct sk_buff *skb, int network_depth, __be16 proto)
 					    ((struct ipv6hdr *)ip_p)->nexthdr;
 }
 
+#define short_frame(size) ((size) <= ETH_ZLEN + ETH_FCS_LEN)
+
 static inline void mlx5e_handle_csum(struct net_device *netdev,
 				     struct mlx5_cqe64 *cqe,
 				     struct mlx5e_rq *rq,
@@ -754,6 +756,17 @@ static inline void mlx5e_handle_csum(struct net_device *netdev,
 	if (unlikely(test_bit(MLX5E_RQ_STATE_NO_CSUM_COMPLETE, &rq->state)))
 		goto csum_unnecessary;
 
+	/* CQE csum doesn't cover padding octets in short ethernet
+	 * frames. And the pad field is appended prior to calculating
+	 * and appending the FCS field.
+	 *
+	 * Detecting these padded frames requires to verify and parse
+	 * IP headers, so we simply force all those small frames to be
+	 * CHECKSUM_UNNECESSARY even if they are not padded.
+	 */
+	if (short_frame(skb->len))
+		goto csum_unnecessary;
+
 	if (likely(is_last_ethertype_ip(skb, &network_depth, &proto))) {
 		if (unlikely(get_ip_proto(skb, network_depth, proto) == IPPROTO_SCTP))
 			goto csum_unnecessary;