On Thu, Aug 22, 2024 at 12:57 PM Jiri Kosina <jikos@xxxxxxxxxx> wrote: > > > If I recollect correctly, there may be an alignment issue and just using > > > the stack is not enough to guaranty what is needed. > > > > I can't find any reference to issues with it, I'm not sure what I saw before. > > Also, it seems like the hid-asus driver is using it: > > https://elixir.bootlin.com/linux/v6.11-rc4/source/drivers/hid/hid-asus.c#L391 > > You can't do DMA from stack; see section "What memory is DMA'able?" of > Documentation/core-api/dma-api-howto.rst Thanks for the link, I knew I'd seen something somewhere, I'll leave the allocation as-is then Stuart
