[PATCH 21.11] net/mlx5: fix miniCQEs number calculation

[Alexander Kozyrev]

Use the information from the CQE, not from the title packet,
for getting the number of miniCQEs in the compressed CQEs array.
This way we can avoid segfaults in the rxq_cq_decompress_v()
in case of mbuf corruption (due to double mbuf free, for example).

Fixes: 6cb559d67b ("net/mlx5: add vectorized Rx/Tx burst for x86")

Signed-off-by: Alexander Kozyrev <akozyrev at nvidia.com>
---
 drivers/net/mlx5/mlx5_rxtx_vec_altivec.h | 3 +--
 drivers/net/mlx5/mlx5_rxtx_vec_neon.h    | 3 +--
 drivers/net/mlx5/mlx5_rxtx_vec_sse.h     | 3 +--
 3 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_rxtx_vec_altivec.h b/drivers/net/mlx5/mlx5_rxtx_vec_altivec.h
index 204d17a8f2..0d4e1df5e8 100644
--- a/drivers/net/mlx5/mlx5_rxtx_vec_altivec.h
+++ b/drivers/net/mlx5/mlx5_rxtx_vec_altivec.h
@@ -93,8 +93,7 @@ rxq_cq_decompress_v(struct mlx5_rxq_data *rxq, volatile struct mlx5_cqe *cq,
 			-1, -1,           /* skip vlan_tci */
 			11, 10,  9,  8};  /* bswap32, rss */
 	/* Restore the compressed count. Must be 16 bits. */
-	const uint16_t mcqe_n = t_pkt->data_len +
-		(rxq->crc_present * RTE_ETHER_CRC_LEN);
+	const uint16_t mcqe_n = rte_be_to_cpu_32(cq->byte_cnt);
 	const __vector unsigned char rearm =
 		(__vector unsigned char)vec_vsx_ld(0,
 		(signed int const *)&t_pkt->rearm_data);
diff --git a/drivers/net/mlx5/mlx5_rxtx_vec_neon.h b/drivers/net/mlx5/mlx5_rxtx_vec_neon.h
index 6d3c594e56..c16cf53c8e 100644
--- a/drivers/net/mlx5/mlx5_rxtx_vec_neon.h
+++ b/drivers/net/mlx5/mlx5_rxtx_vec_neon.h
@@ -92,8 +92,7 @@ rxq_cq_decompress_v(struct mlx5_rxq_data *rxq, volatile struct mlx5_cqe *cq,
 		11, 10,  9,  8  /* hash.rss, bswap32 */
 	};
 	/* Restore the compressed count. Must be 16 bits. */
-	const uint16_t mcqe_n = t_pkt->data_len +
-				(rxq->crc_present * RTE_ETHER_CRC_LEN);
+	const uint16_t mcqe_n = rte_be_to_cpu_32(cq->byte_cnt);
 	const uint64x2_t rearm =
 		vld1q_u64((void *)&t_pkt->rearm_data);
 	const uint32x4_t rxdf_mask = {
diff --git a/drivers/net/mlx5/mlx5_rxtx_vec_sse.h b/drivers/net/mlx5/mlx5_rxtx_vec_sse.h
index ab69af0c55..e9c02b4401 100644
--- a/drivers/net/mlx5/mlx5_rxtx_vec_sse.h
+++ b/drivers/net/mlx5/mlx5_rxtx_vec_sse.h
@@ -92,8 +92,7 @@ rxq_cq_decompress_v(struct mlx5_rxq_data *rxq, volatile struct mlx5_cqe *cq,
 			    -1, -1, 14, 15, /* pkt_len, bswap16 */
 			    -1, -1, -1, -1  /* skip packet_type */);
 	/* Restore the compressed count. Must be 16 bits. */
-	const uint16_t mcqe_n = t_pkt->data_len +
-				(rxq->crc_present * RTE_ETHER_CRC_LEN);
+	const uint16_t mcqe_n = rte_be_to_cpu_32(cq->byte_cnt);
 	const __m128i rearm =
 		_mm_loadu_si128((__m128i *)&t_pkt->rearm_data);
 	const __m128i rxdf =
-- 
2.43.5