[PATCH 4.19 21/33] net: mac802154: Fix racy device stats updates by DEV_STATS_INC() and DEV_STATS_ADD()

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Yunshui Jiang <jiangyunshui@kylinos.cn>

[ Upstream commit b8ec0dc3845f6c9089573cb5c2c4b05f7fc10728 ]

mac802154 devices update their dev->stats fields locklessly. Therefore
these counters should be updated atomically. Adopt SMP safe DEV_STATS_INC()
and DEV_STATS_ADD() to achieve this.

Signed-off-by: Yunshui Jiang <jiangyunshui@kylinos.cn>
Message-ID: <20240531080739.2608969-1-jiangyunshui@kylinos.cn>
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 net/mac802154/tx.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c
index 2f873a0dc5836..0f192174a5693 100644
--- a/net/mac802154/tx.c
+++ b/net/mac802154/tx.c
@@ -42,8 +42,8 @@ void ieee802154_xmit_worker(struct work_struct *work)
 	if (res)
 		goto err_tx;
 
-	dev->stats.tx_packets++;
-	dev->stats.tx_bytes += skb->len;
+	DEV_STATS_INC(dev, tx_packets);
+	DEV_STATS_ADD(dev, tx_bytes, skb->len);
 
 	ieee802154_xmit_complete(&local->hw, skb, false);
 
@@ -94,8 +94,8 @@ ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
 			goto err_tx;
 		}
 
-		dev->stats.tx_packets++;
-		dev->stats.tx_bytes += len;
+		DEV_STATS_INC(dev, tx_packets);
+		DEV_STATS_ADD(dev, tx_bytes, len);
 	} else {
 		local->tx_skb = skb;
 		queue_work(local->workqueue, &local->tx_work);
-- 
2.43.0