Re: [PATCH 6.15.y] net: libwx: fix multicast packets received count

[Greg KH <gregkh@linuxfoundation.org>]

On Tue, Jul 22, 2025 at 10:01:29AM +0800, Jiawen Wu wrote:
> Multicast good packets received by PF rings that pass ethternet MAC
> address filtering are counted for rtnl_link_stats64.multicast. The
> counter is not cleared on read. Fix the duplicate counting on updating
> statistics.
> 
> Fixes: 46b92e10d631 ("net: libwx: support hardware statistics")
> Cc: stable@vger.kernel.org
> Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
> Reviewed-by: Simon Horman <horms@kernel.org>
> Link: https://patch.msgid.link/DA229A4F58B70E51+20250714015656.91772-1-jiawenwu@trustnetic.com
> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
> ---
>  drivers/net/ethernet/wangxun/libwx/wx_hw.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
> index 490d34233d38..884986973cde 100644
> --- a/drivers/net/ethernet/wangxun/libwx/wx_hw.c
> +++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
> @@ -2524,6 +2524,8 @@ void wx_update_stats(struct wx *wx)
>  		hwstats->fdirmiss += rd32(wx, WX_RDB_FDIR_MISS);
>  	}
>  
> +	/* qmprc is not cleared on read, manual reset it */
> +	hwstats->qmprc = 0;
>  	for (i = 0; i < wx->mac.max_rx_queues; i++)
>  		hwstats->qmprc += rd32(wx, WX_PX_MPRC(i));
>  }
> -- 
> 2.25.1
> 
> 

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>