[dpdk-dev] [PATCH 1/2] app/testpmd: fix wrong pointer reference in macswap

[Yongseok Koh <yskoh@mellanox.com>]

The pointer is misused and could set wrong MAC address. As a result, some
of packets can be dropped in receiver side due to MAC address mismatch.
This can be shown as performance degradation.

Bugzilla ID: 188

Fixes: 62b52877adbe ("app/testpmd: batch MAC swap for performance on x86")
Cc: qi.z.zhang@intel.com
Cc: stable@dpdk.org

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
---
 app/test-pmd/macswap_sse.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/test-pmd/macswap_sse.h b/app/test-pmd/macswap_sse.h
index 7d268bfbb0..662fe79cf9 100644
--- a/app/test-pmd/macswap_sse.h
+++ b/app/test-pmd/macswap_sse.h
@@ -76,7 +76,7 @@ do_macswap(struct rte_mbuf *pkts[], uint16_t nb,
 		eth_hdr[0] = rte_pktmbuf_mtod(mb[0], struct ether_hdr *);
 
 		/* Swap dest and src mac addresses. */
-		addr0 = _mm_loadu_si128((__m128i *)eth_hdr);
+		addr0 = _mm_loadu_si128((__m128i *)eth_hdr[0]);
 		addr0 = _mm_shuffle_epi8(addr0, shfl_msk);
 		_mm_storeu_si128((__m128i *)eth_hdr[0], addr0);
 
-- 
2.11.0