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drm/msm: Fix return type of mdp4_lvds_connector_mode_valid

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[ Upstream commit 0b33a33bd15d5bab73b87152b220a8d0153a4587 ]

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 mdp4_lvds_connector_mode_valid should be changed from
int to enum drm_mode_status.

Reported-by: Dan Carpenter <error27@gmail.com>
Link: https://github.com/ClangBuiltLinux/linux/issues/1703
Cc: llvm@lists.linux.dev
Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Fixes: 3e87599b68e7 ("drm/msm/mdp4: add LVDS panel support")
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Patchwork: https://patchwork.freedesktop.org/patch/502878/
Link: https://lore.kernel.org/r/20220913205551.155128-1-nhuck@google.com
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Nathan Huckleberry 2022-09-13 13:55:48 -07:00 committed by Greg Kroah-Hartman
parent 7948db093e
commit 474c6983e1
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/msm/mdp/mdp4/mdp4_lvds_connector.c
View File

@ -71,8 +71,9 @@ static int mdp4_lvds_connector_get_modes(struct drm_connector *connector)
return ret;
}
static int mdp4_lvds_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
static enum drm_mode_status
mdp4_lvds_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct mdp4_lvds_connector *mdp4_lvds_connector =
to_mdp4_lvds_connector(connector);