This is a note to let you know that I've just added the patch titled
net: mac802154: Fix racy device stats updates by DEV_STATS_INC() and DEV_STATS_ADD()
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-mac802154-fix-racy-device-stats-updates-by-dev_s.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c3f13959d5e16f5b716f0d302f3c8c13b347de63
Author: Yunshui Jiang <jiangyunshui@xxxxxxxxxx>
Date: Fri May 31 16:07:39 2024 +0800
net: mac802154: Fix racy device stats updates by DEV_STATS_INC() and DEV_STATS_ADD()
[ 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@xxxxxxxxxx>
Message-ID: <20240531080739.2608969-1-jiangyunshui@xxxxxxxxxx>
Signed-off-by: Stefan Schmidt <stefan@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c
index c829e4a753256..7cea95d0b78f9 100644
--- a/net/mac802154/tx.c
+++ b/net/mac802154/tx.c
@@ -34,8 +34,8 @@ 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);
@@ -86,8 +86,8 @@ 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);
