https://bugs.freedesktop.org/show_bug.cgi?id=108585
--- Comment #4 from Joel joel.stan@gmail.com --- I see a similar backtrace on 4.19.0-11706-g11743c56785c (Linus' tree mid-merge window).
My system has a "fiji" card. The first kernel is 4.19 (upstream release), and the second kernel where the backtrace occurs is with 4.19+.
The second kernel is kexec'd from the first.
If I don't load amdgpu in the first kernel, the second kernel works. So there is something missed in the shutdown path.