[PATCH 1/5] drm/radeon: rework and fix reset detection v2

[Rafał Miłecki]

2013/10/29 Christian König <deathsimple at vodafone.de>:
> From: Christian König <christian.koenig at amd.com>
>
> Stop fiddling with jiffies, always wait for RADEON_FENCE_JIFFIES_TIMEOUT.
> Consolidate the two wait sequence implementations into just one function.
> Activate all waiters and remember if the reset was already done instead of
> trying to reset from only one thread.

With this patch I can't suspend my Samsung with:
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD]
nee ATI Blackcomb [Radeon HD 6900M series] [1002:6720]
anymore.

The backlight goes off, activity LED goes off and then nothing.
Machine is still running and other lights (power, wifi, keyboard,
touchpad) are still working. Seems like a lockup to me.