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During request construction, after pinning the context we know whether or not we have to emit a context switch. So move this common operation from every caller into i915_gem_request_alloc() itself. v2: Always submit the request if we emitted some commands during request construction, as typically it also involves changes in global state. 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/20171120102002.22254-2-chris@chris-wilson.co.uk