From: Chengwen Feng <fengchengwen@huawei.com> If txq's next-to-use plus nb_pkts equal txq's nb_tx_desc when using SVE xmit algorithm, the txq's next-to-use will equal nb_tx_desc after the xmit, this does not cause Tx exceptions, but may affect other ops that depend on this field, such as tx_descriptor_status. Fixes: f0c243a6cb6f ("net/hns3: support SVE Tx") Cc: stable@dpdk.org Signed-off-by: Chengwen Feng <fengchengwen@huawei.com> Signed-off-by: Dongdong Liu <liudongdong3@huawei.com> --- drivers/net/hns3/hns3_rxtx_vec_sve.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/net/hns3/hns3_rxtx_vec_sve.c b/drivers/net/hns3/hns3_rxtx_vec_sve.c index b0dfb052bb..f09a81dbd5 100644 --- a/drivers/net/hns3/hns3_rxtx_vec_sve.c +++ b/drivers/net/hns3/hns3_rxtx_vec_sve.c @@ -464,14 +464,16 @@ hns3_xmit_fixed_burst_vec_sve(void *__restrict tx_queue, return 0; } - if (txq->next_to_use + nb_pkts > txq->nb_tx_desc) { + if (txq->next_to_use + nb_pkts >= txq->nb_tx_desc) { nb_tx = txq->nb_tx_desc - txq->next_to_use; hns3_tx_fill_hw_ring_sve(txq, tx_pkts, nb_tx); txq->next_to_use = 0; } - hns3_tx_fill_hw_ring_sve(txq, tx_pkts + nb_tx, nb_pkts - nb_tx); - txq->next_to_use += nb_pkts - nb_tx; + if (nb_pkts > nb_tx) { + hns3_tx_fill_hw_ring_sve(txq, tx_pkts + nb_tx, nb_pkts - nb_tx); + txq->next_to_use += nb_pkts - nb_tx; + } txq->tx_bd_ready -= nb_pkts; hns3_write_txq_tail_reg(txq, nb_pkts); -- 2.30.0