https://bugs.freedesktop.org/show_bug.cgi?id=108585
--- Comment #5 from Alex Deucher alexdeucher@gmail.com --- (In reply to Joel from comment #4)
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.
Please file your own bug. Kexec is not likely to work and should be tracked separately.