`McstFramesRcvdOk` counts the number of received multicast packets, and
it reports the value correctly.

However, reading `McstFramesRcvdOk` clears the register to zero. As a
result, the driver was reporting only the packets since the last read,
instead of the accumulated total.

Fix this by updating the multicast statistics accumulatively instaed of
instantaneously.

Tested-on: D-Link DGE-550T Rev-A3
Signed-off-by: Yeounsu Moon <yyyynoom@gmail.com>
---
 drivers/net/ethernet/dlink/dl2k.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/dlink/dl2k.c b/drivers/net/ethernet/dlink/dl2k.c
index cc60ee454bf9..6bbf6e5584e5 100644
--- a/drivers/net/ethernet/dlink/dl2k.c
+++ b/drivers/net/ethernet/dlink/dl2k.c
@@ -1099,7 +1099,7 @@ get_stats (struct net_device *dev)
 	dev->stats.rx_bytes += dr32(OctetRcvOk);
 	dev->stats.tx_bytes += dr32(OctetXmtOk);
 
-	dev->stats.multicast = dr32(McstFramesRcvdOk);
+	dev->stats.multicast += dr32(McstFramesRcvdOk);
 	dev->stats.collisions += dr32(SingleColFrames)
 			     +  dr32(MultiColFrames);
 
-- 
2.50.1

On Thu, Aug 21, 2025 at 08:42:53PM +0900, Yeounsu Moon wrote:
> `McstFramesRcvdOk` counts the number of received multicast packets, and
> it reports the value correctly.
> 
> However, reading `McstFramesRcvdOk` clears the register to zero. As a
> result, the driver was reporting only the packets since the last read,
> instead of the accumulated total.
> 
> Fix this by updating the multicast statistics accumulatively instaed of
> instantaneously.

This looks like a fix. Please could you add a Fixes: tag and submit to
net.

https://www.kernel.org/doc/html/latest/process/maintainer-netdev.html


    Andrew

---
pw-bot: cr

Thank you for the review!
I sometimes get confused about whether a patch should go to net or net-next.
I will send v2 with the changes you suggested.

	Yeounsu Moon