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drm/i915/gt: Initialise rps timestamp

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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
This commit is contained in:
Chris Wilson 2020-06-19 16:19:38 +01:00
parent bf3c508375
commit 5a15550e56
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/gt/intel_rps.c
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@ -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;