From 1af745211344622b50ffd7d67a618dcdce85fef8 Mon Sep 17 00:00:00 2001 From: Gregory Etelson Date: Thu, 23 Jul 2020 17:21:04 +0300 Subject: [PATCH] net/mlx5: fix dynamic inline hint handling The ConnectX NICs can transfer data from the host memory with two approaches: provide the pointer to the data buffer, or do data inline - copy the data to the transmit descriptor (WQE) entirely or only the part of data. In some configurations the NIC hardware requires the minimal data to be inline in the descriptor to operate correctly. And there is the special dynamic flag to hint PMD not to inline the data (for example, if buffer is located on some other device - storage or GPU) on per packet basis. If there was a packet with length shorter than the minimal inline data length requested by the NIC hardware and the no-inline hint was set the PMD tried to inline the packet with minimal required length instead of actual packet's one. This patch adds the missed length check into no-inline hint handling branch. Fixes: cacb44a09962 ("net/mlx5: add no-inline Tx flag") Cc: stable@dpdk.org Signed-off-by: Gregory Etelson Acked-by: Viacheslav Ovsiienko --- drivers/net/mlx5/mlx5_rxtx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c index 3eb0243603..1b71e94221 100644 --- a/drivers/net/mlx5/mlx5_rxtx.c +++ b/drivers/net/mlx5/mlx5_rxtx.c @@ -4739,6 +4739,8 @@ mlx5_tx_burst_single_send(struct mlx5_txq_data *__rte_restrict txq, txq->inlen_mode) || (MLX5_TXOFF_CONFIG(MPW) && txq->inlen_mode)) { + if (inlen <= txq->inlen_send) + goto single_inline; /* * The hardware requires the * minimal inline data header. @@ -4755,6 +4757,7 @@ mlx5_tx_burst_single_send(struct mlx5_txq_data *__rte_restrict txq, } goto single_no_inline; } +single_inline: /* * Completely inlined packet data WQE: * - Control Segment, SEND opcode -- 2.20.1