[Bug 110943] [CI][BAT] igt@*(suspend|s3)* - dmesg-warn - Unexpected event: no suitable handler

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110943

--- Comment #3 from Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com> ---
Michal pointed out that in guc_disable_communication() we set the function
pointer to the _nop function inside intel_guc_ct_disable() and therefore before
guc_disable_interrupts(), so this issue might be caused by a log flush
interrupt between those 2 calls.
Simply flipping the order of the 2 calls should fix the warning, but we'll lose
the flush event. However, after CTBs are disabled the guc events are logged in
the SCRATCH_15 register, so we should be able to get it from there. I'll check
with Michal if he has any issues with this approach or any better idea and if
he hasn't I'll prepare a patch.

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