On Tue, 12 Feb 2019 at 22:46, Grodzovsky, Andrey <Andrey.Grodzovsky@xxxxxxx> wrote:
I suspect the issue is that amdgpu_dm_do_flip is holding the BO reserved
and then stack waiting for fences to signal in
reservation_object_wait_timeout_rcu (which won't signal because there
was a VM_FAULT). Then when we try to shutdown display block during reset
recovery from drm_atomic_helper_suspend we also try to reserve the BO,
probably from dm_plane_helper_cleanup_fb ending in deadlock.
To confirm i am attaching some printks around the BO reservation -
please apply and rerun.
Also, probably a good idea to open FDO ticket on this instead of using
amd-gfx.
Andrey
Hi Andrey,
Looks likes at least one line missed in Linux tree or patch incorrect.
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