From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Thu, 9 Mar 2023 12:25:29 +0000 (+0100)
Subject: net: ena: take into account xdp_features setting tx/rx queues
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=7aa6dc351b92abbfead9ebe25ce7a7ac0384ea6d;p=linux.git

net: ena: take into account xdp_features setting tx/rx queues

ena nic allows xdp just if enough hw queues are available for XDP.
Take into account queues configuration setting xdp_features.

Fixes: 66c0e13ad236 ("drivers: net: turn on XDP features")
Reviewed-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---

diff --git a/drivers/net/ethernet/amazon/ena/ena_ethtool.c b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
index 8da79eedc057c..1d4f2f4d10f29 100644
--- a/drivers/net/ethernet/amazon/ena/ena_ethtool.c
+++ b/drivers/net/ethernet/amazon/ena/ena_ethtool.c
@@ -850,11 +850,20 @@ static int ena_set_channels(struct net_device *netdev,
 	struct ena_adapter *adapter = netdev_priv(netdev);
 	u32 count = channels->combined_count;
 	/* The check for max value is already done in ethtool */
-	if (count < ENA_MIN_NUM_IO_QUEUES ||
-	    (ena_xdp_present(adapter) &&
-	    !ena_xdp_legal_queue_count(adapter, count)))
+	if (count < ENA_MIN_NUM_IO_QUEUES)
 		return -EINVAL;
 
+	if (!ena_xdp_legal_queue_count(adapter, count)) {
+		if (ena_xdp_present(adapter))
+			return -EINVAL;
+
+		xdp_clear_features_flag(netdev);
+	} else {
+		xdp_set_features_flag(netdev,
+				      NETDEV_XDP_ACT_BASIC |
+				      NETDEV_XDP_ACT_REDIRECT);
+	}
+
 	return ena_update_queue_count(adapter, count);
 }
 
diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index d3999db7c6a29..cbfe7f977270f 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -4105,8 +4105,6 @@ static void ena_set_conf_feat_params(struct ena_adapter *adapter,
 	/* Set offload features */
 	ena_set_dev_offloads(feat, netdev);
 
-	netdev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT;
-
 	adapter->max_mtu = feat->dev_attr.max_mtu;
 	netdev->max_mtu = adapter->max_mtu;
 	netdev->min_mtu = ENA_MIN_MTU;
@@ -4393,6 +4391,10 @@ static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	ena_config_debug_area(adapter);
 
+	if (ena_xdp_legal_queue_count(adapter, adapter->num_io_queues))
+		netdev->xdp_features = NETDEV_XDP_ACT_BASIC |
+				       NETDEV_XDP_ACT_REDIRECT;
+
 	memcpy(adapter->netdev->perm_addr, adapter->mac_addr, netdev->addr_len);
 
 	netif_carrier_off(netdev);