netdev - [PATCH net-next] tsnep: Fix TX queue stop/wake for multiple queues

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Date:   Sun, 22 Jan 2023 20:04:25 +0100
From:   Gerhard Engleder <gerhard@...leder-embedded.com>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, edumazet@...gle.com,
        pabeni@...hat.com, Gerhard Engleder <gerhard@...leder-embedded.com>
Subject: [PATCH net-next] tsnep: Fix TX queue stop/wake for multiple queues

netif_stop_queue() and netif_wake_queue() act on TX queue 0. This is ok
as long as only a single TX queue is supported. But support for multiple
TX queues was introduced with 762031375d5c and I missed to adapt stop
and wake of TX queues.

Use netif_stop_subqueue() and netif_tx_wake_queue() to act on specific
TX queue.

Fixes: 762031375d5c ("tsnep: Support multiple TX/RX queue pairs")
Signed-off-by: Gerhard Engleder <gerhard@...leder-embedded.com>
---
 drivers/net/ethernet/engleder/tsnep_main.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/engleder/tsnep_main.c b/drivers/net/ethernet/engleder/tsnep_main.c
index e9dfefba5973..c3cf427a9409 100644
--- a/drivers/net/ethernet/engleder/tsnep_main.c
+++ b/drivers/net/ethernet/engleder/tsnep_main.c
@@ -458,7 +458,7 @@ static netdev_tx_t tsnep_xmit_frame_ring(struct sk_buff *skb,
 		/* ring full, shall not happen because queue is stopped if full
 		 * below
 		 */
-		netif_stop_queue(tx->adapter->netdev);
+		netif_stop_subqueue(tx->adapter->netdev, tx->queue_index);
 
 		return NETDEV_TX_BUSY;
 	}
@@ -495,7 +495,7 @@ static netdev_tx_t tsnep_xmit_frame_ring(struct sk_buff *skb,
 
 	if (tsnep_tx_desc_available(tx) < (MAX_SKB_FRAGS + 1)) {
 		/* ring can get full with next frame */
-		netif_stop_queue(tx->adapter->netdev);
+		netif_stop_subqueue(tx->adapter->netdev, tx->queue_index);
 	}
 
 	return NETDEV_TX_OK;
@@ -701,8 +701,8 @@ static bool tsnep_tx_poll(struct tsnep_tx *tx, int napi_budget)
 	} while (likely(budget));
 
 	if ((tsnep_tx_desc_available(tx) >= ((MAX_SKB_FRAGS + 1) * 2)) &&
-	    netif_queue_stopped(tx->adapter->netdev)) {
-		netif_wake_queue(tx->adapter->netdev);
+	    netif_tx_queue_stopped(nq)) {
+		netif_tx_wake_queue(nq);
 	}
 
 	__netif_tx_unlock(nq);
-- 
2.30.2