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

2022-03-25 Thread Maxime Bizon
On Thu, 2022-03-24 at 12:26 -0700, Linus Torvalds wrote: > > It's actually very natural in that situation to flush the caches from > the CPU side again. And so dma_sync_single_for_device() is a fairly > reasonable thing to do in that situation. > In the non-cache-coherent scenario, and assumi

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

2022-03-24 Thread Maxime Bizon
On Thu, 2022-03-24 at 15:27 +0100, Toke Høiland-Jørgensen wrote: > > I'm looking into this; but in the interest of a speedy resolution of > the regression I would be in favour of merging that partial revert > and reinstating it if/when we identify (and fix) any bugs in ath9k :) This looks fishy