drm/i915/gem: Perform all asynchronous waits prior to marking payload start
The initial breadcrumb marks the transition from context wait and setup into the request payload. We use the marker to determine if the request is merely waiting to begin, or is inside the payload and hung. Forgetting to include a breadcrumb before the user payload would mean we do not reset the guilty user request, and conversely if the initial breadcrumb is too early we blame the user for a problem elsewhere. Signed-off-by:Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by:
Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201007090947.19950-1-chris@chris-wilson.co.uk
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