From: Yongseok Koh <yskoh@mellanox.com>
Date: Tue, 1 Aug 2017 16:35:20 +0000 (-0700)
Subject: net/mlx5: fix buffer address posting in SSE Rx
X-Git-Tag: spdx-start~2241
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=545b884b1da3;p=dpdk.git

net/mlx5: fix buffer address posting in SSE Rx

The data_off field of newly allocated mbufs is stale data. This shouldn't
be used in calculating Rx address for device when posting free buffers.
RTE_PKTMBUF_HEADROOM should be used instead and data_off of a mbuf will be
reset on packet reception anyway.

Fixes: 6cb559d67b83 ("net/mlx5: add vectorized Rx/Tx burst for x86")

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
---

diff --git a/drivers/net/mlx5/mlx5_rxtx_vec_sse.c b/drivers/net/mlx5/mlx5_rxtx_vec_sse.c
index 74e595386c..9be48a0c9b 100644
--- a/drivers/net/mlx5/mlx5_rxtx_vec_sse.c
+++ b/drivers/net/mlx5/mlx5_rxtx_vec_sse.c
@@ -568,7 +568,8 @@ rxq_replenish_bulk_mbuf(struct rxq *rxq, uint16_t n)
 		return;
 	}
 	for (i = 0; i < n; ++i)
-		wq[i].addr = htonll(rte_pktmbuf_mtod(elts[i], uintptr_t));
+		wq[i].addr = htonll((uintptr_t)elts[i]->buf_addr +
+				    RTE_PKTMBUF_HEADROOM);
 	rxq->rq_ci += n;
 	rte_wmb();
 	*rxq->rq_db = htonl(rxq->rq_ci);