netdev - [PATCH net v2 2/2] mlx5: fix skb leak while fifo resync

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Message-Id: <20230124000836.20523-3-vfedorenko@novek.ru>
Date:   Tue, 24 Jan 2023 03:08:36 +0300
From:   Vadim Fedorenko <vfedorenko@...ek.ru>
To:     Vadim Fedorenko <vadfed@...com>, Aya Levin <ayal@...dia.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Jakub Kicinski <kuba@...nel.org>, Gal Pressman <gal@...dia.com>
Cc:     Vadim Fedorenko <vadfed@...a.com>, netdev@...r.kernel.org
Subject: [PATCH net v2 2/2] mlx5: fix skb leak while fifo resync

From: Vadim Fedorenko <vadfed@...a.com>

During ptp resync operation SKBs were poped from the fifo but were never
freed neither by napi_consume nor by dev_kfree_skb_any. Add call to
napi_consume_skb to properly free SKBs.

Fixes: 58a518948f60 ("net/mlx5e: Add resiliency for PTP TX port timestamp")
Reviewed-by: Gal Pressman <gal@...dia.com>
Signed-off-by: Vadim Fedorenko <vadfed@...a.com>
---
 drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c b/drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c
index 32d6b387af61..2797028608a3 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c
@@ -102,6 +102,7 @@ static bool mlx5e_ptp_skb_fifo_ts_cqe_resync(struct mlx5e_ptpsq *ptpsq, u16 skb_
 		hwts.hwtstamp = mlx5e_skb_cb_get_hwts(skb)->cqe_hwtstamp;
 		skb_tstamp_tx(skb, &hwts);
 		ptpsq->cq_stats->resync_cqe++;
+		napi_consume_skb(skb, 1);
 		skb_cc = PTP_WQE_CTR2IDX(ptpsq->skb_fifo_cc);
 	}
 
-- 
2.27.0