netdev - [PATCH RFC net-next v2 4/8] cadence: macb: use the current queue number for stats

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Message-ID: <20251220235135.1078587-5-pvalerio@redhat.com>
Date: Sun, 21 Dec 2025 00:51:31 +0100
From: Paolo Valerio <pvalerio@...hat.com>
To: netdev@...r.kernel.org
Cc: Nicolas Ferre <nicolas.ferre@...rochip.com>,
	Claudiu Beznea <claudiu.beznea@...on.dev>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	Théo Lebrun <theo.lebrun@...tlin.com>
Subject: [PATCH RFC net-next v2 4/8] cadence: macb: use the current queue number for stats

gem_get_ethtool_stats calculates the size of the statistics
data to copy always considering maximum number of queues.

The patch makes sure the statistics are copied only for the
active queues as returned in the string set count op.

Signed-off-by: Paolo Valerio <pvalerio@...hat.com>
---
This is not related to XDP, but an issue related to this was
spotted while introducing ethtool stats support resulting in page
pool stats pollution.
Page pool stats support patch was later dropped from the series
once realized its deprecation.
---
 drivers/net/ethernet/cadence/macb_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
index 9e1efc1f56d8..582ceb728124 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -3253,7 +3253,7 @@ static void gem_get_ethtool_stats(struct net_device *dev,
 	spin_lock_irq(&bp->stats_lock);
 	gem_update_stats(bp);
 	memcpy(data, &bp->ethtool_stats, sizeof(u64)
-			* (GEM_STATS_LEN + QUEUE_STATS_LEN * MACB_MAX_QUEUES));
+			* (GEM_STATS_LEN + QUEUE_STATS_LEN * bp->num_queues));
 	spin_unlock_irq(&bp->stats_lock);
 }
 
-- 
2.52.0