[RFC PATCH 30/37] drm: fb_helper: Reference, not duplicate, modes

[Daniel Stone]

Take a reference to existing modes, rather than duplicating them to
create new ones.

Signed-off-by: Daniel Stone <daniels at collabora.com>
---
 drivers/gpu/drm/drm_fb_helper.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 71e2420..130b35d 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -1317,7 +1317,7 @@ struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *f
 			if (mode->flags & DRM_MODE_FLAG_INTERLACE)
 				continue;
 		}
-		return mode;
+		return drm_mode_reference(mode);
 	}
 
 	if (prefer_non_interlace) {
@@ -1329,7 +1329,7 @@ create_mode:
 	mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev,
 						 cmdline_mode);
 	list_add(&mode->head, &fb_helper_conn->connector->modes);
-	return mode;
+	return drm_mode_reference(mode);
 }
 EXPORT_SYMBOL(drm_pick_cmdline_mode);
 
@@ -1429,7 +1429,7 @@ static bool drm_target_cloned(struct drm_fb_helper *fb_helper,
 		fb_helper_conn = fb_helper->connector_info[i];
 		list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) {
 			if (drm_mode_equal(mode, dmt_mode))
-				modes[i] = mode;
+				modes[i] = drm_mode_reference(mode);
 		}
 		if (!modes[i])
 			can_clone = false;
@@ -1527,16 +1527,14 @@ retry:
 				      fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0);
 			modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height);
 			if (modes[i])
-				modes[i] = drm_mode_duplicate(fb_helper->dev,
-				                              modes[i]);
+				drm_mode_reference(modes[i]);
 		}
 		/* No preferred modes, pick one off the list */
 		if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) {
 			list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head)
 				break;
 			if (modes[i])
-				modes[i] = drm_mode_duplicate(fb_helper->dev,
-				                              modes[i]);
+				drm_mode_reference(modes[i]);
 		}
 		DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name :
 			  "none");
@@ -1704,8 +1702,8 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper)
 			fb_crtc->y = offset->y;
 			if (fb_crtc->mode)
 				drm_mode_destroy(dev, fb_crtc->mode);
-			fb_crtc->mode = drm_mode_duplicate(dev,
-							   fb_crtc->desired_mode);
+			fb_crtc->mode =
+				drm_mode_reference(fb_crtc->desired_mode);
 			modeset->mode = fb_crtc->mode;
 			modeset->connectors[modeset->num_connectors++] = fb_helper->connector_info[i]->connector;
 			modeset->fb = fb_helper->fb;
-- 
2.3.2