[PATCH v3 01/10] net/gve: fix DQO descriptor cleaning loop bound

[Tathagat Priyadarshi]

gve_tx_clean_descs_dqo() loops on "while (--nb_descs)", which
processes one completion fewer than requested, and none when asked
for one.

Use a post-decrement so exactly nb_descs completions are processed.

Fixes: 4022f9999f56 ("net/gve: support basic Tx data path for DQO")
Cc: stable at dpdk.org

Signed-off-by: Tathagat Priyadarshi <tathagat.dpdk at gmail.com>
Acked-by: Joshua Washington <joshwash at google.com>
---
 drivers/net/gve/gve_tx_dqo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/gve/gve_tx_dqo.c b/drivers/net/gve/gve_tx_dqo.c
index 5c03d3d1a2..e094761b38 100644
--- a/drivers/net/gve/gve_tx_dqo.c
+++ b/drivers/net/gve/gve_tx_dqo.c
@@ -122,7 +122,7 @@ gve_tx_clean_dqo(struct gve_tx_queue *txq)
 
 static inline void
 gve_tx_clean_descs_dqo(struct gve_tx_queue *txq, uint16_t nb_descs) {
-	while (--nb_descs)
+	while (nb_descs--)
 		gve_tx_clean_dqo(txq);
 }
 
-- 
2.43.0