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

[Klaus Ethgen]

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After three days of bisect I found the bug for my problem with a broken
suspend on x61p of lenovo.

The problem is commit e11aa36. It seems to be a wrong assumption that
disabling the interrupts is enough.

I'll try to revert the commit on top of 3.18.7. (It does not clean
revert.)

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