[PATCH 23.11 1/2] net/hns3: fix CRC data segment
Dengdui Huang
huangdengdui at huawei.com
Tue Jul 15 05:16:48 CEST 2025
[ upstream commit 7a99b6ca9d079e9364ba61d3fe802a4761739c8f ]
When the packet is received into a multisegment mbuf and
the last segment contains only CRC data, the driver should
not release this segment. Otherwise, the application cannot
look the CRC data. This patch fixes it.
Fixes: 8973d7c4ca12 ("net/hns3: support keeping CRC")
Cc: stable at dpdk.org
Signed-off-by: Dengdui Huang <huangdengdui at huawei.com>
---
drivers/net/hns3/hns3_rxtx.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)
diff --git a/drivers/net/hns3/hns3_rxtx.c b/drivers/net/hns3/hns3_rxtx.c
index ab4789c2f1..58aa6edff4 100644
--- a/drivers/net/hns3/hns3_rxtx.c
+++ b/drivers/net/hns3/hns3_rxtx.c
@@ -2383,18 +2383,16 @@ hns3_rxd_to_vlan_tci(struct hns3_rx_queue *rxq, struct rte_mbuf *mb,
}
static inline void
-recalculate_data_len(struct rte_mbuf *first_seg, struct rte_mbuf *last_seg,
- struct rte_mbuf *rxm, struct hns3_rx_queue *rxq,
- uint16_t data_len)
+recalculate_data_len(struct rte_mbuf *last_seg, struct rte_mbuf *rxm,
+ struct hns3_rx_queue *rxq)
{
+ uint16_t data_len = rxm->data_len;
uint8_t crc_len = rxq->crc_len;
if (data_len <= crc_len) {
- rte_pktmbuf_free_seg(rxm);
- first_seg->nb_segs--;
+ rxm->data_len = 0;
last_seg->data_len = (uint16_t)(last_seg->data_len -
(crc_len - data_len));
- last_seg->next = NULL;
} else
rxm->data_len = (uint16_t)(data_len - crc_len);
}
@@ -2725,8 +2723,7 @@ hns3_recv_scattered_pkts(void *rx_queue,
rxm->next = NULL;
if (unlikely(rxq->crc_len > 0)) {
first_seg->pkt_len -= rxq->crc_len;
- recalculate_data_len(first_seg, last_seg, rxm, rxq,
- rxm->data_len);
+ recalculate_data_len(last_seg, rxm, rxq);
}
first_seg->port = rxq->port_id;
--
2.33.0
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