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Subject[PATCH 4.14 163/251] drm/plane-helper: fix uninitialized variable reference
Date
From: Alex Xu (Hello71) <alex_y_xu@yahoo.ca>

[ Upstream commit 7be28bd73f23e53d6e7f5fe891ba9503fc0c7210 ]

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
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 06aee1741e96a..6d57bc01b531f 100644
--- a/drivers/gpu/drm/drm_plane_helper.c
+++ b/drivers/gpu/drm/drm_plane_helper.c
@@ -243,7 +243,6 @@ 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,
};
int ret;

--
2.33.0


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