net/mlx5: Use fallthrough pseudo-keyword

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h

@@ -388,7 +388,7 @@ mlx5e_set_eseg_swp(struct sk_buff *skb, struct mlx5_wqe_eth_seg *eseg,
 	switch (swp_spec->tun_l4_proto) {
 	case IPPROTO_UDP:
 		eseg->swp_flags |= MLX5_ETH_WQE_SWP_INNER_L4_UDP;
-		/* fall through */
+		fallthrough;
 	case IPPROTO_TCP:
 		eseg->swp_inner_l4_offset = skb_inner_transport_offset(skb) / 2;
 		break;

drivers/net/ethernet/mellanox/mlx5/core/en/xdp.c

@@ -152,11 +152,11 @@ bool mlx5e_xdp_handle(struct mlx5e_rq *rq, struct mlx5e_dma_info *di,
 		return true;
 	default:
 		bpf_warn_invalid_xdp_action(act);
-		/* fall through */
+		fallthrough;
 	case XDP_ABORTED:
 xdp_abort:
 		trace_xdp_exception(rq->netdev, prog, act);
-		/* fall through */
+		fallthrough;
 	case XDP_DROP:
 		rq->stats->xdp_drop++;
 		return true;

drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls_tx.c

@@ -470,7 +470,7 @@ bool mlx5e_ktls_handle_tx_skb(struct tls_context *tls_ctx, struct mlx5e_txqsq *s
 			if (likely(!skb->decrypted))
 				goto out;
 			WARN_ON_ONCE(1);
-			/* fall-through */
+			fallthrough;
 		case MLX5E_KTLS_SYNC_FAIL:
 			goto err_out;
 		}

drivers/net/ethernet/mellanox/mlx5/core/en_ethtool.c

@@ -243,7 +243,7 @@ int mlx5e_ethtool_get_sset_count(struct mlx5e_priv *priv, int sset)
 		return MLX5E_NUM_PFLAGS;
 	case ETH_SS_TEST:
 		return mlx5e_self_test_num(priv);
-	/* fallthrough */
+		fallthrough;
 	default:
 		return -EOPNOTSUPP;
 	}

drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c

@@ -2346,7 +2346,7 @@ int mlx5_devlink_eswitch_inline_mode_set(struct devlink *devlink, u8 mode,
 	case MLX5_CAP_INLINE_MODE_NOT_REQUIRED:
 		if (mode == DEVLINK_ESWITCH_INLINE_MODE_NONE)
 			goto out;
-		/* fall through */
+		fallthrough;
 	case MLX5_CAP_INLINE_MODE_L2:
 		NL_SET_ERR_MSG_MOD(extack, "Inline mode can't be set");
 		err = -EOPNOTSUPP;

drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c

@@ -339,14 +339,14 @@ static void mlx5_fpga_conn_handle_cqe(struct mlx5_fpga_conn *conn,
 	switch (opcode) {
 	case MLX5_CQE_REQ_ERR:
 		status = ((struct mlx5_err_cqe *)cqe)->syndrome;
-		/* Fall through */
+		fallthrough;
 	case MLX5_CQE_REQ:
 		mlx5_fpga_conn_sq_cqe(conn, cqe, status);
 		break;
 
 	case MLX5_CQE_RESP_ERR:
 		status = ((struct mlx5_err_cqe *)cqe)->syndrome;
-		/* Fall through */
+		fallthrough;
 	case MLX5_CQE_RESP_SEND:
 		mlx5_fpga_conn_rq_cqe(conn, cqe, status);
 		break;

drivers/net/ethernet/mellanox/mlx5/core/lag_mp.c

@@ -198,13 +198,13 @@ static void mlx5_lag_fib_update(struct work_struct *work)
 	/* Protect internal structures from changes */
 	rtnl_lock();
 	switch (fib_work->event) {
-	case FIB_EVENT_ENTRY_REPLACE: /* fall through */
+	case FIB_EVENT_ENTRY_REPLACE:
 	case FIB_EVENT_ENTRY_DEL:
 		mlx5_lag_fib_route_event(ldev, fib_work->event,
 					 fib_work->fen_info.fi);
 		fib_info_put(fib_work->fen_info.fi);
 		break;
-	case FIB_EVENT_NH_ADD: /* fall through */
+	case FIB_EVENT_NH_ADD:
 	case FIB_EVENT_NH_DEL:
 		fib_nh = fib_work->fnh_info.fib_nh;
 		mlx5_lag_fib_nexthop_event(ldev,
@@ -255,7 +255,7 @@ static int mlx5_lag_fib_event(struct notifier_block *nb,
 		return NOTIFY_DONE;
 
 	switch (event) {
-	case FIB_EVENT_ENTRY_REPLACE: /* fall through */
+	case FIB_EVENT_ENTRY_REPLACE:
 	case FIB_EVENT_ENTRY_DEL:
 		fen_info = container_of(info, struct fib_entry_notifier_info,
 					info);
@@ -278,7 +278,7 @@ static int mlx5_lag_fib_event(struct notifier_block *nb,
 		 */
 		fib_info_hold(fib_work->fen_info.fi);
 		break;
-	case FIB_EVENT_NH_ADD: /* fall through */
+	case FIB_EVENT_NH_ADD:
 	case FIB_EVENT_NH_DEL:
 		fnh_info = container_of(info, struct fib_nh_notifier_info,
 					info);

drivers/net/ethernet/mellanox/mlx5/core/vport.c

@@ -110,7 +110,7 @@ void mlx5_query_min_inline(struct mlx5_core_dev *mdev,
 	case MLX5_CAP_INLINE_MODE_VPORT_CONTEXT:
 		if (!mlx5_query_nic_vport_min_inline(mdev, 0, min_inline_mode))
 			break;
-		/* fall through */
+		fallthrough;
 	case MLX5_CAP_INLINE_MODE_L2:
 		*min_inline_mode = MLX5_INLINE_MODE_L2;
 		break;