On Wed 06 Jun 13:32 PDT 2018, Luis R. Rodriguez wrote: > On Fri, Jun 01, 2018 at 09:23:46PM +0200, Luis R. Rodriguez wrote: > > On Tue, May 08, 2018 at 03:38:05PM +0000, Luis R. Rodriguez wrote: > > > On Fri, May 04, 2018 at 12:44:37PM -0700, Martijn Coenen wrote: > > > > > > > > I think the Qualcomm folks owning this (Andy, David, Bjorn, already > > > > cc'd here) are better suited to answer that question. > > > > > > Andy, David, Bjorn? > > > > Andy, David, Bjorn? > > A month now with no answer... > The patch at the top of this thread doesn't interest me and you didn't bother sending your question To me. As a matter of fact I'm confused to what the actual question is. > Perhaps someone who has this hardware can find out empirically for us, as > follows (mm folks is this right?): > > page = virt_to_page(address); > if (!page) > fail closed... > if (page_zone(page) == ZONE_DMA || page_zone(page) == ZONE_DMA32) > this is a DMA buffer > else > not DMA! > Where do you want to put this? > Note that when request_firmware_into_buf() was being reviewed Mimi had asked back > in 2016 [0] that if a DMA buffer was going to be used READING_FIRMWARE_DMA should be > used otherwise READING_FIRMWARE_PREALLOC_BUFFER was fine. > > If it is a DMA buffer *now*, why / how did this change? > >From what I can see [0] says is to use READING_FIRMWARE_PREALLOC_BUFFER regardless of where the memory comes from. Regards, Bjorn > [0] https://patchwork.kernel.org/patch/9074611/ > > Luis _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
