# Re: \[PATCH\] net: ethernet: mtk\_wed: increase WED v2 WDMA RESV\_BUFF to 0x80

- From: Jakub Kicinski \<kuba@kernel.org\>
- Date: 2026-08-22 00:41:35 
- List: netdev
- Page: https://ratatoskr.run/netdev/2026/08/17447615
- Thread: https://ratatoskr.run/netdev/2026/08/17434002/t.md

```text
On Wed, 19 Aug 2026 21:07:07 +0800 Shiji Yang wrote:
> 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)
```