[dpdk-dev] [PATCH] net/sfc: discard packets with bad CRC on EF10 ESSB Rx

[Andrew Rybchenko <arybchenko@solarflare.com>]

Fixes: 390f9b8d82c9 ("net/sfc: support equal stride super-buffer Rx mode")
Cc: stable@dpdk.org

Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Ivan Malov <ivan.malov@oktetlabs.ru>
---
 drivers/net/sfc/sfc_ef10_essb_rx.c | 7 +++++++
 drivers/net/sfc/sfc_ef10_rx_ev.h   | 6 +++++-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/net/sfc/sfc_ef10_essb_rx.c b/drivers/net/sfc/sfc_ef10_essb_rx.c
index 5f5af602c..a3b988fcf 100644
--- a/drivers/net/sfc/sfc_ef10_essb_rx.c
+++ b/drivers/net/sfc/sfc_ef10_essb_rx.c
@@ -322,6 +322,12 @@ sfc_ef10_essb_rx_get_pending(struct sfc_ef10_essb_rxq *rxq,
 			const efx_qword_t *qwordp;
 			uint16_t pkt_len;
 
+			/* Buffers to be discarded have 0 in packet type */
+			if (unlikely(m->packet_type == 0)) {
+				rte_mempool_put(rxq->refill_mb_pool, m);
+				goto next_buf;
+			}
+
 			rx_pkts[n_rx_pkts++] = m;
 
 			/* Parse pseudo-header */
@@ -357,6 +363,7 @@ sfc_ef10_essb_rx_get_pending(struct sfc_ef10_essb_rxq *rxq,
 				EFX_QWORD_FIELD(*qwordp,
 						ES_EZ_ESSB_RX_PREFIX_MARK);
 
+next_buf:
 			m = sfc_ef10_essb_next_mbuf(rxq, m);
 		} while (todo_bufs-- > 0);
 	}
diff --git a/drivers/net/sfc/sfc_ef10_rx_ev.h b/drivers/net/sfc/sfc_ef10_rx_ev.h
index 615bd29b4..37b40056e 100644
--- a/drivers/net/sfc/sfc_ef10_rx_ev.h
+++ b/drivers/net/sfc/sfc_ef10_rx_ev.h
@@ -37,8 +37,10 @@ sfc_ef10_rx_ev_to_offloads(const efx_qword_t rx_ev, struct rte_mbuf *m,
 	if (unlikely(rx_ev.eq_u64[0] &
 		rte_cpu_to_le_64((1ull << ESF_DZ_RX_ECC_ERR_LBN) |
 				 (1ull << ESF_DZ_RX_ECRC_ERR_LBN) |
-				 (1ull << ESF_DZ_RX_PARSE_INCOMPLETE_LBN))))
+				 (1ull << ESF_DZ_RX_PARSE_INCOMPLETE_LBN)))) {
+		/* Zero packet type is used as a marker to dicard bad packets */
 		goto done;
+	}
 
 #if SFC_EF10_RX_EV_ENCAP_SUPPORT
 	switch (EFX_QWORD_FIELD(rx_ev, ESF_EZ_RX_ENCAP_HDR)) {
@@ -157,6 +159,8 @@ sfc_ef10_rx_ev_to_offloads(const efx_qword_t rx_ev, struct rte_mbuf *m,
 		SFC_ASSERT(false);
 	}
 
+	SFC_ASSERT(l2_ptype != 0);
+
 done:
 	m->ol_flags = ol_flags & ol_mask;
 	m->packet_type = tun_ptype | l2_ptype | l3_ptype | l4_ptype;
-- 
2.17.1