From 3a6f2eb8c5c597d6675a8fbb9563010c0c546521 Mon Sep 17 00:00:00 2001 From: Yongseok Koh Date: Thu, 14 Dec 2017 17:59:17 -0800 Subject: [PATCH] net/mlx5: fix Memory Region registration Although granularity of chunks in a mempool is a cacheline, addresses are extended to align to page boundary for performance reason in device when registering a MR (Memory Region). This could make some regions overlap, then can cause Tx completion error due to incorrect LKEY search. If the error occurs, the Tx queue will get stuck. To avoid it, end address of a packet segment is used in LKEY search. Fixes: b0b093845793 ("net/mlx5: use buffer address for LKEY search") Cc: stable@dpdk.org Reported-by: Hanoch Haim Signed-off-by: Yongseok Koh Acked-by: Nelio Laranjeiro --- drivers/net/mlx5/mlx5_rxtx.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/mlx5/mlx5_rxtx.h b/drivers/net/mlx5/mlx5_rxtx.h index b8c7925a34..b783ca2032 100644 --- a/drivers/net/mlx5/mlx5_rxtx.h +++ b/drivers/net/mlx5/mlx5_rxtx.h @@ -543,7 +543,7 @@ static __rte_always_inline uint32_t mlx5_tx_mb2mr(struct mlx5_txq_data *txq, struct rte_mbuf *mb) { uint16_t i = txq->mr_cache_idx; - uintptr_t addr = rte_pktmbuf_mtod(mb, uintptr_t); + uintptr_t addr = rte_pktmbuf_mtod_offset(mb, uintptr_t, DATA_LEN(mb)); struct mlx5_mr *mr; assert(i < RTE_DIM(txq->mp2mr)); -- 2.20.1