https://bugzilla.kernel.org/show_bug.cgi?id=90861
--- Comment #6 from Michel Dänzer michel@daenzer.net --- Looks like dpm_watchdog_handler kicks in while the radeon driver is waiting for a fence to signal. Maybe the Radeon GPU IRQ is disabled too early during suspend or something like that?
(In reply to Jon Arne Jørgensen from comment #5)
I was _not_ able to reproduce the panic with kernel-3.10.0-rc7 that I had lying around in my /boot directory.
Can you bisect?