[dpdk-dev] [PATCH 4/5] net/mlx5: fix memory registration cache last index

[Shahaf Shuler]

In case memory registration cache is full the new mempool will be
inserted in the last index of the array.

Update the last entry being hit to reflect it.

Fixes: 6cb559d67b83 ("net/mlx5: add vectorized Rx/Tx burst for x86")
Cc: stable at dpdk.org
Cc: yskoh at mellanox.com

Signed-off-by: Shahaf Shuler <shahafs at mellanox.com>
---
 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 2934f9fb3..4bedfb89b 100644
--- a/drivers/net/mlx5/mlx5_rxtx.h
+++ b/drivers/net/mlx5/mlx5_rxtx.h
@@ -572,7 +572,6 @@ mlx5_tx_mb2mr(struct mlx5_txq_data *txq, struct rte_mbuf *mb)
 			return txq->mp2mr[i]->lkey;
 		}
 	}
-	txq->mr_cache_idx = 0;
 	mp = mlx5_tx_mb2mp(mb);
 	if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
 		WARN("Using unregistered mempool 0x%p(%s) in secondary process,"
@@ -588,6 +587,7 @@ mlx5_tx_mb2mr(struct mlx5_txq_data *txq, struct rte_mbuf *mb)
 	 */
 	if (mr) {
 		rte_atomic32_inc(&mr->refcnt);
+		txq->mr_cache_idx = i >= RTE_DIM(txq->mp2mr) ? i - 1 : i;
 		return mr->lkey;
 	} else {
 		WARN("Failed to register mempool 0x%p(%s)",
-- 
2.12.0