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 zynqmp_dp_connector_mode_valid should be changed from
int to enum drm_mode_status.
Reported-by: Dan Carpenter <error27@xxxxxxxxx>
Link: https://github.com/ClangBuiltLinux/linux/issues/1703
Cc: llvm@xxxxxxxxxxxxxxx
Signed-off-by: Nathan Huckleberry <nhuck@xxxxxxxxxx>
---
drivers/gpu/drm/xlnx/zynqmp_dp.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/xlnx/zynqmp_dp.c b/drivers/gpu/drm/xlnx/zynqmp_dp.c
index d14612b34796..f571b08d23d3 100644
--- a/drivers/gpu/drm/xlnx/zynqmp_dp.c
+++ b/drivers/gpu/drm/xlnx/zynqmp_dp.c
@@ -1352,8 +1352,9 @@ zynqmp_dp_connector_best_encoder(struct drm_connector *connector)
return &dp->encoder;
}
-static int zynqmp_dp_connector_mode_valid(struct drm_connector *connector,
- struct drm_display_mode *mode)
+static enum drm_mode_status
+zynqmp_dp_connector_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
{
struct zynqmp_dp *dp = connector_to_dp(connector);
u8 max_lanes = dp->link_config.max_lanes;
--
2.37.2.789.g6183377224-goog
