From: Beilei Xing <[email protected]>
The QW0 of Tx context descriptor should be reset to 0, otherwise the
previous hardware writeback value may polute the next context descriptor
write.
Fixes: a2b29a7733ef ("net/avf: enable basic Rx Tx")
Cc: [email protected]
Signed-off-by: Qi Zhang <[email protected]>
Signed-off-by: Beilei Xing <[email protected]>
---
drivers/net/iavf/iavf_rxtx.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/iavf/iavf_rxtx.c b/drivers/net/iavf/iavf_rxtx.c
index 74b5ab5bde..6a713df828 100644
--- a/drivers/net/iavf/iavf_rxtx.c
+++ b/drivers/net/iavf/iavf_rxtx.c
@@ -2245,6 +2245,11 @@ iavf_xmit_pkts(void *tx_queue, struct rte_mbuf
**tx_pkts, uint16_t nb_pkts)
(volatile struct iavf_tx_context_desc *)
&txr[tx_id];
+ /* clear QW0 or the previous writeback value
+ * may impact next write
+ */
+ *(volatile uint64_t *)ctx_txd = 0;
+
txn = &sw_ring[txe->next_id];
RTE_MBUF_PREFETCH_TO_FREE(txn->mbuf);
if (txe->mbuf) {
--
2.26.2
