Merge branch 'eth-fbnic-fix-drop-stats-support'

Mohsin Bashir says:

====================
eth: fbnic: Fix drop stats support

Fix hardware drop stats support on the TX path of fbnic by addressing two
issues: ensure that tx_dropped stats are correctly copied to the
rtnl_link_stats64 struct, and protect the copying of drop stats from
fdb->hw_stats to the local variable with the hw_stats_lock to
ensure consistency.
====================

Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: kuba-moo

drivers/net/ethernet/meta/fbnic/fbnic_netdev.c

@@ -422,15 +422,17 @@ static void fbnic_get_stats64(struct net_device *dev,
 	tx_packets = stats->packets;
 	tx_dropped = stats->dropped;
 
-	stats64->tx_bytes = tx_bytes;
-	stats64->tx_packets = tx_packets;
-	stats64->tx_dropped = tx_dropped;
-
 	/* Record drops from Tx HW Datapath */
+	spin_lock(&fbd->hw_stats_lock);
 	tx_dropped += fbd->hw_stats.tmi.drop.frames.value +
 		      fbd->hw_stats.tti.cm_drop.frames.value +
 		      fbd->hw_stats.tti.frame_drop.frames.value +
 		      fbd->hw_stats.tti.tbi_drop.frames.value;
+	spin_unlock(&fbd->hw_stats_lock);
+
+	stats64->tx_bytes = tx_bytes;
+	stats64->tx_packets = tx_packets;
+	stats64->tx_dropped = tx_dropped;
 
 	for (i = 0; i < fbn->num_tx_queues; i++) {
 		struct fbnic_ring *txr = fbn->tx[i];