[dpdk-dev] [PATCH 12/14] mlx5: fix local protection error when TX MP to MR cache is full

[Adrien Mazarguil]

From: Olga Shern <ol...@mellanox.com>

When MP to MR cache is full, the last (newest) MR is freed instead of the
first (oldest) one, causing local protection errors during TX.

Fixes: 2e22920b85d9 ("mlx5: support non-scattered Tx and Rx")

Signed-off-by: Olga Shern <olgas at mellanox.com>
Signed-off-by: Adrien Mazarguil <adrien.mazarguil at 6wind.com>
---
 drivers/net/mlx5/mlx5_rxtx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/mlx5/mlx5_rxtx.c b/drivers/net/mlx5/mlx5_rxtx.c
index c6c167c..eb6c9f7 100644
--- a/drivers/net/mlx5/mlx5_rxtx.c
+++ b/drivers/net/mlx5/mlx5_rxtx.c
@@ -179,7 +179,7 @@ txq_mp2mr(struct txq *txq, const struct rte_mempool *mp)
                DEBUG("%p: MR <-> MP table full, dropping oldest entry.",
                      (void *)txq);
                --i;
-               claim_zero(ibv_dereg_mr(txq->mp2mr[i].mr));
+               claim_zero(ibv_dereg_mr(txq->mp2mr[0].mr));
                memmove(&txq->mp2mr[0], &txq->mp2mr[1],
                        (sizeof(txq->mp2mr) - sizeof(txq->mp2mr[0])));
        }
-- 
2.1.0