Re: [REGRESSION] Recent swiotlb DMA_FROM_DEVICE fixes break ath9k-based AP

Hello.

On středa 23. března 2022 18:27:21 CET Linus Torvalds wrote:

On Wed, Mar 23, 2022 at 12:19 AM Oleksandr Natalenko oleksandr@natalenko.name wrote:

...

These commits appeared in v5.17 and v5.16.15, and both kernels are broken for me. I'm pretty confident these commits make the difference since I've built both v5.17 and v5.16.15 without them, and it fixed the issue.

Can you double-check (or just explicitly confirm if you already did that test) that you need to revert *both* of those commits, and it's the later "rework" fix that triggers it?

I can confirm that if I revert aa6f8dcbab47 only, but leave ddbd89deb7d3 in place, AP works. So, it seems that the latest "rework" triggers the issue for me.

Thanks.