From: Jakub Kicinski kuba@kernel.org
[ Upstream commit 8fdeafd66edaf420ea0063a1f13442fe3470fe70 ]
mlx4 doesn't support ndo_xdp_xmit / XDP_REDIRECT and wasn't using page pool until now, so it could run XDP completions in netpoll (NAPI budget == 0) just fine. Page pool has calling context requirements, make sure we don't try to call it from what is potentially HW IRQ context.
Reviewed-by: Tariq Toukan tariqt@nvidia.com Link: https://patch.msgid.link/20250213010635.1354034-3-kuba@kernel.org Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/mellanox/mlx4/en_tx.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c index 65cb63f6c4658..61a0fd8424a2c 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c @@ -450,6 +450,8 @@ int mlx4_en_process_tx_cq(struct net_device *dev,
if (unlikely(!priv->port_up)) return 0; + if (unlikely(!napi_budget) && cq->type == TX_XDP) + return 0;
netdev_txq_bql_complete_prefetchw(ring->tx_queue);