https://bugs.freedesktop.org/show_bug.cgi?id=73053
--- Comment #35 from Rpnpif rpnpif@free.fr --- (In reply to comment #34)
I have trying some minutes ago 3.14.12 kernel that have your patches included, I think. But same issue : the system reboots early in the sequence boot.
Or my bug is different or it is the same and your patches does not fix it. Only radeon.dpm=0 on the kernel command line fix it.