回覆: [PATCH] net: ethernet: mtk_wed: increase WED v2 WDMA RESV_BUFF to 0x80

Hi Lorenzo,

    it is only for v2.  v3 changed the hw design and fixed it.  so this RESV_BUFF register was removed  

Thanks
Rex Lu
________________________________________
寄件者: Lorenzo Bianconi
已傳送: 星期一, 2026 年 8 月 24 日  下午 03:48
收件者: Jakub Kicinski
副本: Shiji Yang; netdev@vger.kernel.org; Rex Lu (盧建銘); Felix Fietkau; Andrew Lunn; David S. Miller; Eric Dumazet; Paolo Abeni; Matthias Brugger; AngeloGioacchino Del Regno; linux-kernel@vger.kernel.org; linux-arm-kernel@lists.infradead.org; linux-mediatek@lists.infradead.org
主旨: Re: [PATCH] net: ethernet: mtk_wed: increase WED v2 WDMA RESV_BUFF to 0x80

On Aug 21, Jakub Kicinski wrote:

quoted

On Wed, 19 Aug 2026 21:07:07 +0800 Shiji Yang wrote:

quoted

Change WDMA RESV_BUFF from 0x40 to 0x80 to avoid CDM TX FIFO overflow.
Without this patch mt7986 and mt7981 may have WDMA TX hang issue. This
patch was pulled from mtk-openwrt-feeds GPL open source project.

Lorenzo, could you TAL? (incl. Simon's suggestion of the Fixes tag)

I am wondering if this is necessary for v3 as well.
@Rex any input on it?

Regarding Fixes tag, I think cf26df8833cc is the right one.

Regards,
Lorenzo

sure, I am AFK now, I will review it next week.

Regards,
Lorenzo