netdev - Re: [PATCH net-next v6 2/6] net: stmmac: Add support for Allwinner A523 GMAC200

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Message-ID: <CAGb2v64E+CEjnGmnnSyGhkFm=qHrpMeR+sLv_54qkmnKc1AvdQ@mail.gmail.com>
Date: Thu, 18 Sep 2025 00:28:35 +0800
From: Chen-Yu Tsai <wens@...nel.org>
To: Chukun Pan <amadeus@....edu.cn>
Cc: andre.przywara@....com, andrew+netdev@...n.ch, conor+dt@...nel.org, 
	davem@...emloft.net, devicetree@...r.kernel.org, edumazet@...gle.com, 
	jernej@...nel.org, krzk+dt@...nel.org, kuba@...nel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	linux-sunxi@...ts.linux.dev, netdev@...r.kernel.org, pabeni@...hat.com, 
	robh@...nel.org, samuel@...lland.org, 
	"Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Subject: Re: [PATCH net-next v6 2/6] net: stmmac: Add support for Allwinner
 A523 GMAC200

On Wed, Sep 17, 2025 at 3:00 PM Chukun Pan <amadeus@....edu.cn> wrote:
>
> Hi,
>
> I tested this on Radxa Cubie A5E and there seems to be a small issue:
>
> When VLAN_8021Q is enabled (CONFIG_VLAN_8021Q=y), down the eth1 interface:
>
> ~ # ifconfig eth1 down
> [   96.695463] dwmac-sun55i 4510000.ethernet eth1: Timeout accessing MAC_VLAN_Tag_Filter
> [   96.703356] dwmac-sun55i 4510000.ethernet eth1: failed to kill vid 0081/0
>
> Is this a known issue?

There's a comment above stmmac_vlan_rx_kill_vid:

/* FIXME: This may need RXC to be running, but it may be called with BH
 * disabled, which means we can't call phylink_rx_clk_stop*().
 */

So maybe this is a known issue? Looks like the comment was left by Russell.


ChenYu