Re: [PATCH] media: uvcvideo: Use streaming DMA APIs to transfer buffers
From: Christoph Hellwig
Date: Tue Oct 01 2019 - 02:38:05 EST
On Mon, Sep 30, 2019 at 01:23:10AM -0700, Christoph Hellwig wrote:
> And drivers really have no business looking at the dma mask. I have
> a plan for dma_alloc_pages API that could replace that cruft, but
> until then please use GFP_KERNEL and let the dma subsystem bounce
> buffer if needed.
Can you try this series:
http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/dma_alloc_pages
and see if it does whay you need for usb?