[Bug 82340] [HSW Bisected] Fail to resume from S4, causing system hang (once out of 5 test circles)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82340

--- Comment #10 from yaoming <ming.yao at intel.com> ---
(In reply to comment #9)
> Try
> http://cgit.freedesktop.org/~ickle/linux-2.6/commit/
> ?h=requests&id=30e95d38220df18fafb1918027714ef6ecb8d259 instead then.


With this patch, no system hang appears. But each time I test S4(20 circles),
it would be interrupted on circle 2 or circle 3, just like reboot.
It is the same result on the latest
drm-intel-nightly(43df30da20447e2856b2761215ff274886a9f931).

My reproduce step:

for ((i=0; i<20; i++))
do
  echo 0 > /sys/class/rtc/rtc0/wakealarm
  echo +45 > /sys/class/rtc/rtc0/wakealarm
  echo disk > /sys/power/state
done

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