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[dpdk-dev,2/2] net/mlx5: fix overflow of Memory Region cache

Message ID 20171215015918.30981-2-yskoh@mellanox.com (mailing list archive)
State Accepted, archived
Delegated to: Ferruh Yigit
Headers show


Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Yongseok Koh Dec. 15, 2017, 1:59 a.m. UTC
If there're more MR(Memroy Region)'s than the size of per-queue cache, the
cache can be overflowed and corrupt the following data structure in

Fixes: 6e78005a9b30 ("net/mlx5: add reference counter on DPDK Tx queues")
Cc: stable@dpdk.org

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
 drivers/net/mlx5/mlx5_trigger.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/drivers/net/mlx5/mlx5_trigger.c b/drivers/net/mlx5/mlx5_trigger.c
index ed80a6bee..88f60a01d 100644
--- a/drivers/net/mlx5/mlx5_trigger.c
+++ b/drivers/net/mlx5/mlx5_trigger.c
@@ -64,8 +64,11 @@  priv_txq_start(struct priv *priv)
 		if (!txq_ctrl)
-		LIST_FOREACH(mr, &priv->mr, next)
+		LIST_FOREACH(mr, &priv->mr, next) {
 			priv_txq_mp2mr_reg(priv, &txq_ctrl->txq, mr->mp, idx++);
+			if (idx == MLX5_PMD_TX_MP_CACHE)
+				break;
+		}
 		txq_ctrl->ibv = mlx5_priv_txq_ibv_new(priv, i);
 		if (!txq_ctrl->ibv) {