drm/i915/gem: Merge GGTT vma flush into a single loop

We only need the one loop to find the dirty vma flush them and their
chipset.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191119100929.2628356-6-chris@chris-wilson.co.uk

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
index db103d3..63bd3ff 100644 (file)
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
@@ -279,18 +279,12 @@ i915_gem_object_flush_write_domain(struct drm_i915_gem_object *obj,
 
        switch (obj->write_domain) {
        case I915_GEM_DOMAIN_GTT:
-               for_each_ggtt_vma(vma, obj)
-                       intel_gt_flush_ggtt_writes(vma->vm->gt);
-
-               intel_frontbuffer_flush(obj->frontbuffer, ORIGIN_CPU);
-
                for_each_ggtt_vma(vma, obj) {
-                       if (vma->iomap)
-                               continue;
-
-                       i915_vma_unset_ggtt_write(vma);
+                       if (i915_vma_unset_ggtt_write(vma))
+                               intel_gt_flush_ggtt_writes(vma->vm->gt);
                }
 
+               intel_frontbuffer_flush(obj->frontbuffer, ORIGIN_CPU);
                break;
 
        case I915_GEM_DOMAIN_WC: