@@ -86,7 +86,8 @@ static bool mlx5e_ptp_ts_cqe_drop(struct mlx5e_ptpsq *ptpsq, u16 skb_cc, u16 skb
return (ptpsq->ts_cqe_ctr_mask && (skb_cc != skb_id));
}
-static void mlx5e_ptp_skb_fifo_ts_cqe_resync(struct mlx5e_ptpsq *ptpsq, u16 skb_cc, u16 skb_id)
+static void mlx5e_ptp_skb_fifo_ts_cqe_resync(struct mlx5e_ptpsq *ptpsq, u16 skb_cc,
+ u16 skb_id, int budget)
{
struct skb_shared_hwtstamps hwts = {};
struct sk_buff *skb;
@@ -98,6 +99,7 @@ static void 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, budget);
skb_cc = PTP_WQE_CTR2IDX(ptpsq->skb_fifo_cc);
}
}
@@ -119,7 +121,7 @@ static void mlx5e_ptp_handle_ts_cqe(struct mlx5e_ptpsq *ptpsq,
}
if (mlx5e_ptp_ts_cqe_drop(ptpsq, skb_cc, skb_id))
- mlx5e_ptp_skb_fifo_ts_cqe_resync(ptpsq, skb_cc, skb_id);
+ mlx5e_ptp_skb_fifo_ts_cqe_resync(ptpsq, skb_cc, skb_id, budget);
skb = mlx5e_skb_fifo_pop(&ptpsq->skb_fifo);
hwtstamp = mlx5e_cqe_ts_to_ns(sq->ptp_cyc2time, sq->clock, get_cqe_ts(cqe));
@@ -86,7 +86,7 @@ void mlx5e_free_txqsq_descs(struct mlx5e_txqsq *sq);
static inline bool
mlx5e_skb_fifo_has_room(struct mlx5e_skb_fifo *fifo)
{
- return (*fifo->pc - *fifo->cc) < fifo->mask;
+ return (u16)(*fifo->pc - *fifo->cc) < fifo->mask;
}
static inline bool
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. Another leak was happening because mlx5e_skb_fifo_has_room() had an error in the check. Comparing free running counters works well unless C promotes the types to something wider than the counter. In this case counters are u16 but the result of the substraction is promouted to int and it causes wrong result (negative value) of the check when producer have already overlapped but consumer haven't yet. Explicit cast to u16 fixes the issue. Fixes: 58a518948f60 ("net/mlx5e: Add resiliency for PTP TX port timestamp") Reviewed-by: Gal Pressman <gal@nvidia.com> Reviewed-by: Tariq Toukan <tariqt@nvidia.com> Signed-off-by: Vadim Fedorenko <vadfed@meta.com> --- drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c | 6 ++++-- drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h | 2 +- 2 files changed, 5 insertions(+), 3 deletions(-)