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mlx4: fix local protection error when Tx MP to MR cache is full

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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: 7fae69eeff13 ("mlx4: new poll mode driver")

Signed-off-by: Olga Shern <olgas@mellanox.com>
Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
This commit is contained in:
Olga Shern 2015-11-23 15:44:40 +01:00 committed by Thomas Monjalon
parent 0a3b350da8
commit 40100bfe34
1 changed files with 1 additions and 1 deletions
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2
drivers/net/mlx4/mlx4.c
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@ -1049,7 +1049,7 @@ 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])));
}