Hi Gerd, Thanks for your reply. I was aware of that change, but need a fix for 5.4 kernel as a temp solution for now. If the reason is just that you will move away from ttm soon,then I guess a CL like http://crrev.com/c/3092457 should work for 5.4, just hope I don't miss anything else. Thanks! On Sun, Aug 15, 2021 at 9:46 PM Gerd Hoffmann <kraxel@xxxxxxxxxx> wrote: > > On Fri, Aug 13, 2021 at 12:42:51PM -0700, lepton wrote: > > Hi Gerd, > > > > We found a bug in 5.4 kernel and virtgpu_gem_prime_mmap doesn't work > > because it references vma_node in gem_base object while ttm code > > initialized vma_node in tbo.base object. I am wondering, in your > > original serial: > > https://patchwork.kernel.org/project/dri-devel/cover/20190805124310.3275-1-kraxel@xxxxxxxxxx/ > > (drm/ttm: make ttm bo a gem bo subclass), why you changed to use > > embedded gem object for most gpu drivers but skipping virtio gpu? Is > > there some specific reason? > > commit c66df701e783bc666593e6e665f13670760883ee > Author: Gerd Hoffmann <kraxel@xxxxxxxxxx> > Date: Thu Aug 29 12:32:57 2019 +0200 > > drm/virtio: switch from ttm to gem shmem helpers > > HTH, > Gerd >
