From: Nathan Huckleberry <nh...@google.com>
[ Upstream commit b0b9408f132623dc88e78adb5282f74e4b64bb57 ]
The mode_valid field in drm_connector_helper_funcs is expected to be of
type:
enum drm_mode_status (* mode_valid) (struct drm_connector *connector,
struct drm_display_mode *mode);
The mismatched return type breaks forward edge kCFI since the underlying
function definition does not match the function hook definition.
The return type of cdn_dp_connector_mode_valid should be changed from
int to enum drm_mode_status.
Reported-by: Dan Carpenter <erro...@gmail.com>
Link: https://github.com/ClangBuiltLinux/linux/issues/1703
Cc: l...@lists.linux.dev
Signed-off-by: Nathan Huckleberry <nh...@google.com>
Reviewed-by: Nathan Chancellor <nat...@kernel.org>
Signed-off-by: Heiko Stuebner <he...@sntech.de>
Link:
https://patchwork.freedesktop.org/patch/msgid/20220913205555.155149-1-nh...@google.com
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
drivers/gpu/drm/rockchip/cdn-dp-core.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c
b/drivers/gpu/drm/rockchip/cdn-dp-core.c
index 8f299d76b69b..67dae1354aa6 100644
--- a/drivers/gpu/drm/rockchip/cdn-dp-core.c
+++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c
@@ -275,8 +275,9 @@ static int cdn_dp_connector_get_modes(struct drm_connector
*connector)
return ret;
}
-static int cdn_dp_connector_mode_valid(struct drm_connector *connector,
- struct drm_display_mode *mode)
+static enum drm_mode_status
+cdn_dp_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
{
struct cdn_dp_device *dp = connector_to_dp(connector);
struct drm_display_info *display_info = &dp->connector.display_info;
--
2.35.1
