[PATCH net-next] eth: ionic: delete the incorrect link_down_count reporting

[Jakub Kicinski <kuba@kernel.org>]

The definition of the statistic is quite clear,
struct ethtool_link_ext_stats says:

   This statistic counts when PHY _actually_ went down, or lost link.

Reportedly this is not how the device-counted stat on ionic behaves.
The goal is to detect flapping links, due to bad cabling.
ionic reportedly uses this for some firmware stat of how many times
the traffic was stopped. This is _not_ what should be reported here.

Link: https://lore.kernel.org/20260610061830.51037-1-eric.joyner@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
CC: brett.creeley@amd.com
CC: eric.joyner@amd.com
CC: leitao@debian.org
---
 drivers/net/ethernet/pensando/ionic/ionic_ethtool.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
index 78a802eb159f..f7dcfe3d032d 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
@@ -111,15 +111,6 @@ static void ionic_get_regs(struct net_device *netdev, struct ethtool_regs *regs,
 	memcpy_fromio(p + offset, idev->dev_cmd_regs->words, size);
 }
 
-static void ionic_get_link_ext_stats(struct net_device *netdev,
-				     struct ethtool_link_ext_stats *stats)
-{
-	struct ionic_lif *lif = netdev_priv(netdev);
-
-	if (lif->ionic->pdev->is_physfn)
-		stats->link_down_events = lif->link_down_count;
-}
-
 static int ionic_get_link_ksettings(struct net_device *netdev,
 				    struct ethtool_link_ksettings *ks)
 {
@@ -1132,7 +1123,6 @@ static const struct ethtool_ops ionic_ethtool_ops = {
 	.get_regs_len		= ionic_get_regs_len,
 	.get_regs		= ionic_get_regs,
 	.get_link		= ethtool_op_get_link,
-	.get_link_ext_stats	= ionic_get_link_ext_stats,
 	.get_link_ksettings	= ionic_get_link_ksettings,
 	.set_link_ksettings	= ionic_set_link_ksettings,
 	.get_coalesce		= ionic_get_coalesce,
-- 
2.54.0