From: Ville Syrjälä <ville.syrjala@linux.intel.com>
Date: Mon, 7 Nov 2022 19:25:43 +0000 (+0200)
Subject: drm/mtk: Use drm_mode_init() for on-stack modes
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=20c76052c3003668147818a78453398c82d4438e;p=linux.git

drm/mtk: Use drm_mode_init() for on-stack modes

Initialize on-stack modes with drm_mode_init() to guarantee
no stack garbage in the list head.

Based on the following cocci script, with manual fixups:
@decl@
identifier M;
expression E;
@@
- struct drm_display_mode M = E;
+ struct drm_display_mode M;

@@
identifier decl.M;
expression decl.E;
statement S, S1;
@@
struct drm_display_mode M;
... when != S
+ drm_mode_init(&M, &E);
+
S1

@@
expression decl.E;
@@
- &*E
+ E

Cc: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221107192545.9896-6-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index 4c80b6896dc3d..12fa78f286ffc 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -1217,7 +1217,7 @@ static int mtk_hdmi_bridge_mode_valid(struct drm_bridge *bridge,
 	if (next_bridge) {
 		struct drm_display_mode adjusted_mode;
 
-		drm_mode_copy(&adjusted_mode, mode);
+		drm_mode_init(&adjusted_mode, mode);
 		if (!drm_bridge_chain_mode_fixup(next_bridge, mode,
 						 &adjusted_mode))
 			return MODE_BAD;