From 7be28bd73f23e53d6e7f5fe891ba9503fc0c7210 Mon Sep 17 00:00:00 2001
From: "Alex Xu (Hello71)" <alex_y_xu@yahoo.ca>
Date: Thu, 7 Oct 2021 02:37:06 -0400
Subject: [PATCH] drm/plane-helper: fix uninitialized variable reference
Git-commit: 7be28bd73f23e53d6e7f5fe891ba9503fc0c7210
Patch-mainline: v5.16-rc1
References: git-fixes stable-5.14.19
Drivers/gpu/drm/drm_plane_helper.c: In function 'drm_primary_helper_update':
drivers/gpu/drm/drm_plane_helper.c:113:32: error: 'visible' is used uninitialized [-Werror=uninitialized]
113 | struct drm_plane_state plane_state = {
| ^~~~~~~~~~~
drivers/gpu/drm/drm_plane_helper.c:178:14: note: 'visible' was declared here
178 | bool visible;
| ^~~~~~~
Cc1: all warnings being treated as errors
visible is an output, not an input. in practice this use might turn out
OK but it's still UB.
Fixes: df86af9133b4 ("drm/plane-helper: Add drm_plane_helper_check_state()")
Reviewed-by: Simon Ser <contact@emersion.fr>
Signed-off-by: Alex Xu (Hello71) <alex_y_xu@yahoo.ca>
Signed-off-by: Simon Ser <contact@emersion.fr>
Link: https://patchwork.freedesktop.org/patch/msgid/20211007063706.305984-1-alex_y_xu@yahoo.ca
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/drm_plane_helper.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_plane_helper.c b/drivers/gpu/drm/drm_plane_helper.c
index 5b2d0ca03705..838b32b70bce 100644
--- a/drivers/gpu/drm/drm_plane_helper.c
+++ b/drivers/gpu/drm/drm_plane_helper.c
@@ -123,7 +123,6 @@ static int drm_plane_helper_check_update(struct drm_plane *plane,
.crtc_w = drm_rect_width(dst),
.crtc_h = drm_rect_height(dst),
.rotation = rotation,
- .visible = *visible,
};
struct drm_crtc_state crtc_state = {
.crtc = crtc,
--
2.26.2