netdev - [PATCH net-next 08/12] net/mlx5e: Tx, Don't implicitly assume SKB-less wqe has one WQEBB

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Message-Id: <1562340622-4423-9-git-send-email-tariqt@mellanox.com>
Date:   Fri,  5 Jul 2019 18:30:18 +0300
From:   Tariq Toukan <tariqt@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, Eran Ben Elisha <eranbe@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        moshe@...lanox.com, Tariq Toukan <tariqt@...lanox.com>
Subject: [PATCH net-next 08/12] net/mlx5e: Tx, Don't implicitly assume SKB-less wqe has one WQEBB

From: Eran Ben Elisha <eranbe@...lanox.com>

When polling a CQE of an SKB-less WQE, don't assume it consumed only
one WQEBB. Use wi->num_wqebbs directly instead.
In the downstream patch, SKB-less WQEs might have more the one WQEBB,
thus this change is needed.

Signed-off-by: Eran Ben Elisha <eranbe@...lanox.com>
Signed-off-by: Tariq Toukan <tariqt@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en_tx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
index 983ea6206a94..9740ca51921d 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_tx.c
@@ -485,8 +485,8 @@ bool mlx5e_poll_tx_cq(struct mlx5e_cq *cq, int napi_budget)
 			wi = &sq->db.wqe_info[ci];
 			skb = wi->skb;
 
-			if (unlikely(!skb)) { /* nop */
-				sqcc++;
+			if (unlikely(!skb)) {
+				sqcc += wi->num_wqebbs;
 				continue;
 			}
 
-- 
1.8.3.1