[Bug 93121] [BYT BAT IGT] GT register access while GT waking disabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93121

--- Comment #4 from Joonas Lahtinen <joonas.lahtinen at linux.intel.com> ---
I added tracking for the ALLOWWAKE bit for VLV and WARN_ON's to vlv_write/write
(vlv_write which I forked from gen6_write) if the bit is disabled and register
is in RENDER or MEDIA register ranges. This revealed that at least the bug I am
able to reproduce, is caused by hangcheck accessing the render ring when waking
from runtime suspend. Attached log.

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