[lvc-project] [PATCH] net/intel/common: avoid field pointer arithmetic

[Artem Novikov]

The Rx rearm failure path assigns fake mbufs through rxp, but rxp is the
address of the mbuf field in a single software ring entry.

Use the software ring array for indexed access so pointer arithmetic is
done on struct ci_rx_entry instead of on the address of a field.

Fixes: 773cbaf2ad38 ("net/intel: avoid allocating from mempool directly")
Cc: stable at dpdk.org
Cc: bruce.richardson at intel.com

Signed-off-by: Artem Novikov <naa at amicon.ru>
---
 drivers/net/intel/common/rx_vec_x86.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/intel/common/rx_vec_x86.h b/drivers/net/intel/common/rx_vec_x86.h
index 8d497e7196..9670a21fa4 100644
--- a/drivers/net/intel/common/rx_vec_x86.h
+++ b/drivers/net/intel/common/rx_vec_x86.h
@@ -33,7 +33,7 @@ _ci_rxq_rearm_get_bufs(struct ci_rx_queue *rxq)
 			const __m128i zero = _mm_setzero_si128();
 
 			for (i = 0; i < CI_VPMD_DESCS_PER_LOOP; i++) {
-				rxp[i] = &rxq->fake_mbuf;
+				rxq->sw_ring[rxq->rxrearm_start + i].mbuf = &rxq->fake_mbuf;
 				_mm_store_si128(RTE_CAST_PTR(__m128i *, &rxdp[i]), zero);
 			}
 		}
-- 
2.43.0