[KERNEL] Regression bug in drm/i915, Wrong assumption in commit e11aa36 breaks suspend on at least lenovo x61

[Klaus Ethgen]

After solving  the conflicts, I applied the revert (see attachment) to
v3.18.7. I think it should also apply to the current head. With that
patch, suspend is working again on that version.

However, I have not to deep knowledge of that subsystem, so please,
someone who have, have a deeper look into it. I especially do not know
if the lines in .../intel_pm.c are correct or better leaving them as
they are in v3.18.7.

I want to have it working on a version that I know is stable before
asking to pull it to head.

Regards
   Klaus
-- 
Klaus Ethgen                              http://www.ethgen.ch/
pub  4096R/4E20AF1C 2011-05-16   Klaus Ethgen <Klaus at Ethgen.de>
Fingerprint: 85D4 CA42 952C 949B 1753  62B3 79D0 B06F 4E20 AF1C
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