Hi Jose, On Tue, 2017-12-05 at 12:26 +0000, Jose Abreu wrote: > On 05-12-2017 11:53, Alexey Brodkin wrote: > > > > > > From my note above about udl_drm_gem_mmap() being only used in case of Xserver > > I barely may conclude anything. Given my lack of knowledge of DRM guts > > especially > > when it comes to complicated cases with DMA buffer exports/imports I cannot say > > immediately if that's just improper implementation of > > udl_drm_gem_mmap() or not. > > Even though I do see some differences between implementation of file_operations->mmap() > > callback in UDL and > > say exynos_drm_gem_mmap() or qxl_mmap() it's not clear > > why this and that implementation was done. > > Oh, I've seen this before. This is the same thing that arcpgu > used to do in the mmap callback! Please comment out the call to > update_vm_cache_attr() in the mmap callback and check if it works. Actually I did it as the first thing when I spotted it in?udl_drm_gem_mmap(). But that made no difference at all :( -Alexey
