| Message ID | 1300801920-23130-8-git-send-email-chris@chris-wilson.co.uk (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index 3f2e212..9d8a1e8 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -2979,6 +2979,14 @@ i915_gem_clflush_object(struct drm_i915_gem_object *obj) if (obj->pages == NULL) return; + /* If the GPU is snooping the contents of the CPU cache, + * we do not need to clear the CPU cache lines. Instead we need + * to be sure to flush/invalidate the RENDER cache when the contents + * must be refreshed. + */ + if (obj->cache_level != I915_CACHE_NONE) + return; + trace_i915_gem_object_clflush(obj); drm_clflush_pages(obj->pages, obj->base.size / PAGE_SIZE);