[PATCH net-next v2] net: gve: convert to use .get_rx_ring_count

[Breno Leitao <leitao@debian.org>]

Convert the Google Virtual Ethernet (GVE) driver to use the new
.get_rx_ring_count ethtool operation instead of handling
ETHTOOL_GRXRINGS in .get_rxnfc. This simplifies the code by moving the
ring count query to a dedicated callback.

The new callback provides the same functionality in a more direct way,
following the ongoing ethtool API modernization.

Reviewed-by: Subbaraya Sundeep <sbhatta@marvell.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Breno Leitao <leitao@debian.org>
---
Changes in v2:
- Added the reviewed-by tags
- Link to v1: https://patch.msgid.link/20251222-gxring_google-v1-1-35e7467e5c1a@debian.org
---
 drivers/net/ethernet/google/gve/gve_ethtool.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c
index 52500ae8348e..9ed1d4529427 100644
--- a/drivers/net/ethernet/google/gve/gve_ethtool.c
+++ b/drivers/net/ethernet/google/gve/gve_ethtool.c
@@ -815,15 +815,19 @@ static int gve_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd)
 	return err;
 }
 
+static u32 gve_get_rx_ring_count(struct net_device *netdev)
+{
+	struct gve_priv *priv = netdev_priv(netdev);
+
+	return priv->rx_cfg.num_queues;
+}
+
 static int gve_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd, u32 *rule_locs)
 {
 	struct gve_priv *priv = netdev_priv(netdev);
 	int err = 0;
 
 	switch (cmd->cmd) {
-	case ETHTOOL_GRXRINGS:
-		cmd->data = priv->rx_cfg.num_queues;
-		break;
 	case ETHTOOL_GRXCLSRLCNT:
 		if (!priv->max_flow_rules)
 			return -EOPNOTSUPP;
@@ -966,6 +970,7 @@ const struct ethtool_ops gve_ethtool_ops = {
 	.get_channels = gve_get_channels,
 	.set_rxnfc = gve_set_rxnfc,
 	.get_rxnfc = gve_get_rxnfc,
+	.get_rx_ring_count = gve_get_rx_ring_count,
 	.get_rxfh_indir_size = gve_get_rxfh_indir_size,
 	.get_rxfh_key_size = gve_get_rxfh_key_size,
 	.get_rxfh = gve_get_rxfh,

---
base-commit: c303e8b86d9dbd6868f5216272973292f7f3b7f1
change-id: 20251222-gxring_google-d6c76c372f76

Best regards,
--  
Breno Leitao <leitao@debian.org>