[PATCH 1/8] net/hns3: fix segment fault when using SVE xmit

[Dongdong Liu]

From: Chengwen Feng <fengchengwen at huawei.com>

Currently, the number of Tx send bytes is obtained by accumulating the
length of the batch 'mbuf' packets of the current loop cycle.
Unfortunately, it uses svcntd (which means all lane, regardless of
whether the corresponding lane is valid) which may lead to overflow,
and thus refers to an invalid mbuf.

Because the SVE xmit algorithm applies only to a single mbuf, the
mbuf's data_len is equal pkt_len, so this patch fixes it by using
svaddv_u64(svbool_t pg, svuint64_t data_len) which only adds valid
lanes.

Fixes: fdcd6a3e0246 ("net/hns3: add bytes stats")
Cc: stable at dpdk.org

Signed-off-by: Chengwen Feng <fengchengwen at huawei.com>
Signed-off-by: Dongdong Liu <liudongdong3 at huawei.com>
---
 drivers/net/hns3/hns3_rxtx_vec_sve.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/net/hns3/hns3_rxtx_vec_sve.c b/drivers/net/hns3/hns3_rxtx_vec_sve.c
index be1fdbcdf0..b0dfb052bb 100644
--- a/drivers/net/hns3/hns3_rxtx_vec_sve.c
+++ b/drivers/net/hns3/hns3_rxtx_vec_sve.c
@@ -435,9 +435,8 @@ hns3_tx_fill_hw_ring_sve(struct hns3_tx_queue *txq,
 				offsets, svdup_n_u64(valid_bit));
 
 		/* Increment bytes counter */
-		uint32_t idx;
-		for (idx = 0; idx < svcntd(); idx++)
-			txq->basic_stats.bytes += pkts[idx]->pkt_len;
+		txq->basic_stats.bytes +=
+			(svaddv_u64(pg, data_len) >> HNS3_UINT16_BIT);
 
 		/* update index for next loop */
 		i += svcntd();
-- 
2.22.0