netdev - [PATCH net] ice: don't stop netdev tx queues when setting up XSK socket

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Date: Mon, 25 Sep 2023 10:19:57 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	netdev@...r.kernel.org
Cc: Kamil Maziarz <kamil.maziarz@...el.com>,
	anthony.l.nguyen@...el.com,
	maciej.fijalkowski@...el.com,
	magnus.karlsson@...el.com,
	ast@...nel.org,
	daniel@...earbox.net,
	hawk@...nel.org,
	john.fastabend@...il.com,
	bpf@...r.kernel.org,
	Chandan Kumar Rout <chandanx.rout@...el.com>
Subject: [PATCH net] ice: don't stop netdev tx queues when setting up XSK socket

From: Kamil Maziarz <kamil.maziarz@...el.com>

Avoid stopping netdev tx queues during XSK setup by removing
netif_tx_stop_queue() and netif_tx_start_queue().
These changes prevent unnecessary stopping and starting of netdev
transmit queues during the setup of XDP socket. Without this change,
after stopping the XDP traffic flow tracker and then stopping
the XDP prog - NETDEV WATCHDOG transmit queue timed out appears.

Fixes: 2d4238f55697 ("ice: Add support for AF_XDP")
Signed-off-by: Kamil Maziarz <kamil.maziarz@...el.com>
Tested-by: Chandan Kumar Rout <chandanx.rout@...el.com> (A Contingent Worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 drivers/net/ethernet/intel/ice/ice_xsk.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_xsk.c b/drivers/net/ethernet/intel/ice/ice_xsk.c
index 2a3f0834e139..cec492b827d4 100644
--- a/drivers/net/ethernet/intel/ice/ice_xsk.c
+++ b/drivers/net/ethernet/intel/ice/ice_xsk.c
@@ -179,7 +179,6 @@ static int ice_qp_dis(struct ice_vsi *vsi, u16 q_idx)
 			return -EBUSY;
 		usleep_range(1000, 2000);
 	}
-	netif_tx_stop_queue(netdev_get_tx_queue(vsi->netdev, q_idx));
 
 	ice_fill_txq_meta(vsi, tx_ring, &txq_meta);
 	err = ice_vsi_stop_tx_ring(vsi, ICE_NO_RESET, 0, tx_ring, &txq_meta);
@@ -268,7 +267,6 @@ static int ice_qp_ena(struct ice_vsi *vsi, u16 q_idx)
 	ice_qvec_toggle_napi(vsi, q_vector, true);
 	ice_qvec_ena_irq(vsi, q_vector);
 
-	netif_tx_start_queue(netdev_get_tx_queue(vsi->netdev, q_idx));
 free_buf:
 	kfree(qg_buf);
 	return err;
-- 
2.38.1