Merge tag 'drm-misc-fixes-2016-12-22' of git://anongit.freedesktop.org/git/drm-misc into drm-fixes

Here's the one lonely bugfix I talked about on irc.

* tag 'drm-misc-fixes-2016-12-22' of git://anongit.freedesktop.org/git/drm-misc:
  drivers/gpu/drm/ast: Fix infinite loop if read fails