drm/i915: Prevent use of global_seqno=0
Chris Wilson authored
We are not allowed to assign rq->global_seqno=0 as it has a special
meaning of "inactive" (not executing on HW).

Fixes: 6faf5916

 ("drm/i915: Remove HW semaphores for gen7 inter-engine synchronisation")
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: default avatarMika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190119143024.26971-1-chris@chris-wilson.co.uk
f1e9c909
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