On Mon, Sep 28, 2020 at 12:15:56PM +0200, Paul Cercueil wrote: > Hi Christoph, > > Le lun. 28 sept. 2020 à 8:04, Christoph Hellwig <hch@xxxxxx> a écrit : >> On Mon, Sep 28, 2020 at 01:54:05PM +1000, Stephen Rothwell wrote: >>> Hi all, >>> >>> After merging the drm tree, today's linux-next build (x86_64 >>> allmodconfig) >>> failed like this: >> >> The driver needs to switch do dma_alloc_noncoherent + dma_sync_single* >> like the other drivers converted in the dma tree. Paul, let me know if >> you have any questions. > > I don't dma_alloc* anything, DRM core does. I use the > DMA_ATTR_NON_CONSISTENT attr with dma_mmap_attrs(). Is there a replacement > for that? dma_mmap_attrs can only be used on allocations from dma_mmap_attrs with the same attrs. As there is no allocation using DMA_ATTR_NON_CONSISTENT in the drm core, something looks very fishy here. Where does the allocation you try to mmap come from? All the allocations in drivers/gpu/drm/drm_gem_cma_helper.c seems to use dma_alloc_wc (aka dma_allloc_attrs with the DMA_ATTR_WRITE_COMBINE flag).
