Commit 5a15550e authored Jun 19, 2020 by Chris Wilson

drm/i915/gt: Initialise rps timestamp

Smatch warns that we may iterate over an empty array of gt->engines[].
One hopes that this is impossible, but nevertheless we can simply
appease smatch by initialising the timestamp to zero before we starting
probing the busy-time from the engines.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200619151938.21740-1-chris@chris-wilson.co.uk

parent bf3c5083

drivers/gpu/drm/i915/gt/intel_rps.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -51,10 +51,11 @@ static void rps_timer(struct timer_list *t)
		{
		struct intel_rps *rps = from_timer(rps, t, timer);
		struct intel_engine_cs *engine;
		ktime_t dt, last, timestamp;
		enum intel_engine_id id;
		s64 max_busy[3] = {};
		ktime_t dt, timestamp, last;

		timestamp = 0;
		for_each_engine(engine, rps_to_gt(rps), id) {
		s64 busy;
		int i;
		@@ -69,7 +70,6 @@ static void rps_timer(struct timer_list *t)
		swap(busy, max_busy[i]);
		}
		}

		last = rps->pm_timestamp;
		rps->pm_timestamp = timestamp;