From: Tvrtko Ursulin <[email protected]> No need to call ktime_get_raw_ns twice per unlimited wait and can also elimate a local variable.
Signed-off-by: Tvrtko Ursulin <[email protected]> --- drivers/gpu/drm/i915/i915_gem.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index de98dc41fb9f..c4f69579eb7a 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -1246,7 +1246,7 @@ int __i915_wait_request(struct drm_i915_gem_request *req, int state = interruptible ? TASK_INTERRUPTIBLE : TASK_UNINTERRUPTIBLE; DEFINE_WAIT(wait); unsigned long timeout_expire; - s64 before, now; + s64 before = 0; int ret; WARN(!intel_irqs_enabled(dev_priv), "IRQs disabled"); @@ -1266,14 +1266,17 @@ int __i915_wait_request(struct drm_i915_gem_request *req, return -ETIME; timeout_expire = jiffies + nsecs_to_jiffies_timeout(*timeout); + + /* + * Record current time in case interrupted by signal, or wedged. + */ + before = ktime_get_raw_ns(); } if (INTEL_INFO(dev_priv)->gen >= 6) gen6_rps_boost(dev_priv, rps, req->emitted_jiffies); - /* Record current time in case interrupted by signal, or wedged */ trace_i915_gem_request_wait_begin(req); - before = ktime_get_raw_ns(); /* Optimistic spin for the next jiffie before touching IRQs */ ret = __i915_spin_request(req, state); @@ -1331,11 +1334,10 @@ int __i915_wait_request(struct drm_i915_gem_request *req, finish_wait(&ring->irq_queue, &wait); out: - now = ktime_get_raw_ns(); trace_i915_gem_request_wait_end(req); if (timeout) { - s64 tres = *timeout - (now - before); + s64 tres = *timeout - (ktime_get_raw_ns() - before); *timeout = tres < 0 ? 0 : tres; -- 1.9.1 _______________________________________________ Intel-gfx mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/intel-gfx
