RE: [PATCH net-next 3/3] net: stmmac: Introducing support for Page Pool

From: Jose Abreu
Date: Tue Jul 23 2019 - 06:07:58 EST

From: Jon Hunter <jonathanh@xxxxxxxxxx>
Date: Jul/23/2019, 11:01:24 (UTC+00:00)

> This appears to be a winner and by disabling the SMMU for the ethernet
> controller and reverting commit 954a03be033c7cef80ddc232e7cbdb17df735663
> this worked! So yes appears to be related to the SMMU being enabled. We
> had to enable the SMMU for ethernet recently due to commit
> 954a03be033c7cef80ddc232e7cbdb17df735663.

Finally :)

However, from "git show 954a03be033c7cef80ddc232e7cbdb17df735663":

+ There are few reasons to allow unmatched stream bypass, and
+ even fewer good ones. If saying YES here breaks your board
+ you should work on fixing your board.

So, how can we fix this ? Is your ethernet DT node marked as
"dma-coherent;" ?

Jose Miguel Abreu