Hi Christoph, On Wed, Aug 18, 2021 at 10:28 AM Christoph Hellwig <hch@xxxxxx> wrote: > > On Wed, Aug 18, 2021 at 06:31:19AM -0300, Fabio Estevam wrote: > > Correct, on i.MX7 the ath10k Wifi chip connects via SDIO. > > > > Is there a way to avoid the WARN_ON_ONCE(!dev->coherent_dma_mask) > > to happen in this case? > > The way to avoid it is by stoppind to use dma_alloc_attrs/coherent > on a device that is not DMA capable. Understood, thanks. Maybe something like this (untested)? https://pastebin.com/xTZqtRqD Kalle, >From an ath10k driver perspective: would you have any suggestions as to how to stop calling dma_alloc_coherent() for the SDIO and USB cases? Thanks
