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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Kamal Heib <kheib@redhat.com>,
	Jacob Keller <jacob.e.keller@intel.com>,
	"David S . Miller" <davem@davemloft.net>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.15 108/317] net: ena: Remove ena_select_queue
Date: Sun, 24 Mar 2024 19:31:28 -0400
Message-ID: <20240324233458.1352854-109-sashal@kernel.org>
In-Reply-To: <20240324233458.1352854-1-sashal@kernel.org>
References: <20240324233458.1352854-1-sashal@kernel.org>
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From: Kamal Heib <kheib@redhat.com>

[ Upstream commit 78e886ba2b549945ecada055ee0765f0ded5707a ]

Avoid the following warnings by removing the ena_select_queue() function
and rely on the net core to do the queue selection, The issue happen
when an skb received from an interface with more queues than ena is
forwarded to the ena interface.

[ 1176.159959] eth0 selects TX queue 11, but real number of TX queues is 8
[ 1176.863976] eth0 selects TX queue 14, but real number of TX queues is 8
[ 1180.767877] eth0 selects TX queue 14, but real number of TX queues is 8
[ 1188.703742] eth0 selects TX queue 14, but real number of TX queues is 8

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Kamal Heib <kheib@redhat.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 17 -----------------
 1 file changed, 17 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 7d4b862be783d..43c099141e211 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -3187,22 +3187,6 @@ static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	return NETDEV_TX_OK;
 }
 
-static u16 ena_select_queue(struct net_device *dev, struct sk_buff *skb,
-			    struct net_device *sb_dev)
-{
-	u16 qid;
-	/* we suspect that this is good for in--kernel network services that
-	 * want to loop incoming skb rx to tx in normal user generated traffic,
-	 * most probably we will not get to this
-	 */
-	if (skb_rx_queue_recorded(skb))
-		qid = skb_get_rx_queue(skb);
-	else
-		qid = netdev_pick_tx(dev, skb, NULL);
-
-	return qid;
-}
-
 static void ena_config_host_info(struct ena_com_dev *ena_dev, struct pci_dev *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -3372,7 +3356,6 @@ static const struct net_device_ops ena_netdev_ops = {
 	.ndo_open		= ena_open,
 	.ndo_stop		= ena_close,
 	.ndo_start_xmit		= ena_start_xmit,
-	.ndo_select_queue	= ena_select_queue,
 	.ndo_get_stats64	= ena_get_stats64,
 	.ndo_tx_timeout		= ena_tx_timeout,
 	.ndo_change_mtu		= ena_change_mtu,
-- 
2.43.0