netdev - Re: [PATCH v2] net: r8169: Disable multicast filter for RTL_GIGA_MAC_VER

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Date: Fri, 27 Oct 2023 17:50:46 -0400
From: Patrick Thompson <ptf@...gle.com>
To: netdev@...r.kernel.org
Cc: Chun-Hao Lin <hau@...ltek.com>, "David S. Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Heiner Kallweit <hkallweit1@...il.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, linux-kernel@...r.kernel.org, 
	nic_swsd@...ltek.com, Jeffery Miller <jefferymiller@...gle.com>
Subject: Re: [PATCH v2] net: r8169: Disable multicast filter for RTL_GIGA_MAC_VER_46

Hello Heiner,

I haven't heard back from realtek about the possibility that this
affects other MAC_VERs. Do you think it's acceptable to merge this
patch for now and if/when we hear back from realtek I can adjust the
function again?

Thank you,
Patrick

On Fri, Oct 27, 2023 at 5:31 PM Patrick Thompson <ptf@...gle.com> wrote:
>
> MAC_VER_46 ethernet adapters fail to detect eapol packets unless
> allmulti is enabled. Add exception for VER_46 in the same way VER_35
> has an exception.
>
> Fixes: 6e1d0b898818 ("r8169:add support for RTL8168H and RTL8107E")
> Signed-off-by: Patrick Thompson <ptf@...gle.com>
> ---
>
> Changes in v2:
> - add Fixes tag
> - add net annotation
> - update description
>
>  drivers/net/ethernet/realtek/r8169_main.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
> index 361b90007148b..a775090650e3a 100644
> --- a/drivers/net/ethernet/realtek/r8169_main.c
> +++ b/drivers/net/ethernet/realtek/r8169_main.c
> @@ -2584,7 +2584,8 @@ static void rtl_set_rx_mode(struct net_device *dev)
>                 rx_mode |= AcceptAllPhys;
>         } else if (netdev_mc_count(dev) > MC_FILTER_LIMIT ||
>                    dev->flags & IFF_ALLMULTI ||
> -                  tp->mac_version == RTL_GIGA_MAC_VER_35) {
> +                  tp->mac_version == RTL_GIGA_MAC_VER_35 ||
> +                  tp->mac_version == RTL_GIGA_MAC_VER_46) {
>                 /* accept all multicasts */
>         } else if (netdev_mc_empty(dev)) {
>                 rx_mode &= ~AcceptMulticast;
> --
> 2.42.0.820.g83a721a137-goog
>