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drm/i915/gt: Initialise rps timestamp
author
Chris Wilson
<chris@chris-wilson.co.uk>
Fri, 19 Jun 2020 15:19:38 +0000
(16:19 +0100)
committer
Chris Wilson
<chris@chris-wilson.co.uk>
Fri, 19 Jun 2020 19:00:18 +0000
(20:00 +0100)
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
drivers/gpu/drm/i915/gt/intel_rps.c
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diff --git
a/drivers/gpu/drm/i915/gt/intel_rps.c
b/drivers/gpu/drm/i915/gt/intel_rps.c
index
bdece93
..
296391d
100644
(file)
--- a/
drivers/gpu/drm/i915/gt/intel_rps.c
+++ b/
drivers/gpu/drm/i915/gt/intel_rps.c
@@
-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;