drm/i915: Combine cleanup_status_page()

Pull the physical status page cleanup into a common
cleanup_status_page() for caller simplicity.
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/20180903152304.31589-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/intel_engine_cs.c

@@ -530,19 +530,14 @@ void intel_engine_cleanup_scratch(struct intel_engine_cs *engine)
 	i915_vma_unpin_and_release(&engine->scratch, 0);
 }
 
-static void cleanup_phys_status_page(struct intel_engine_cs *engine)
+static void cleanup_status_page(struct intel_engine_cs *engine)
 {
-	struct drm_i915_private *dev_priv = engine->i915;
+	struct drm_dma_handle *dmah;
 
-	if (!dev_priv->status_page_dmah)
-		return;
+	dmah = fetch_and_zero(&engine->i915->status_page_dmah);
+	if (dmah)
+		drm_pci_free(&engine->i915->drm, dmah);
 
-	drm_pci_free(&dev_priv->drm, dev_priv->status_page_dmah);
-	engine->status_page.page_addr = NULL;
-}
-
-static void cleanup_status_page(struct intel_engine_cs *engine)
-{
 	i915_vma_unpin_and_release(&engine->status_page.vma,
 				   I915_VMA_RELEASE_MAP);
 }
@@ -710,10 +705,7 @@ void intel_engine_cleanup_common(struct intel_engine_cs *engine)
 
 	intel_engine_cleanup_scratch(engine);
 
-	if (HWS_NEEDS_PHYSICAL(engine->i915))
-		cleanup_phys_status_page(engine);
-	else
-		cleanup_status_page(engine);
+	cleanup_status_page(engine);
 
 	intel_engine_fini_breadcrumbs(engine);
 	intel_engine_cleanup_cmd_parser(engine);