drm/i915: Skip the no-op domain changes when already in CPU|GTT domains

Removes some superfluous fluff from tracing...

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index f0f8c6ff684f4d19ee0497c3174e1a599cdcbbea..9297143447cf008473ef8fc5088b4c2e405f29b1 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2931,6 +2931,9 @@ i915_gem_object_set_to_gtt_domain(struct drm_i915_gem_object *obj, bool write)
        if (obj->gtt_space == NULL)
                return -EINVAL;
 
+       if (obj->base.write_domain == I915_GEM_DOMAIN_GTT)
+               return 0;
+
        ret = i915_gem_object_flush_gpu_write_domain(obj);
        if (ret)
                return ret;
@@ -3033,6 +3036,9 @@ i915_gem_object_set_to_cpu_domain(struct drm_i915_gem_object *obj, bool write)
        uint32_t old_write_domain, old_read_domains;
        int ret;
 
+       if (obj->base.write_domain == I915_GEM_DOMAIN_CPU)
+               return 0;
+
        ret = i915_gem_object_flush_gpu_write_domain(obj);
        if (ret)
                return ret;