All of the functions used for intel_dvo_dev_ops.mode_valid have a return type of enum drm_mode_status, but the mode_valid field in the struct definition has a return type of int. The mismatched return type breaks forward edge kCFI since the underlying function definitions do not match the function hook definition. The return type of the mode_valid field 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/i915/display/intel_dvo_dev.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dvo_dev.h b/drivers/gpu/drm/i915/display/intel_dvo_dev.h index d96c3cc46e50..50205f064d93 100644 --- a/drivers/gpu/drm/i915/display/intel_dvo_dev.h +++ b/drivers/gpu/drm/i915/display/intel_dvo_dev.h @@ -75,8 +75,8 @@ struct intel_dvo_dev_ops { * * \return MODE_OK if the mode is valid, or another MODE_* otherwise. */ - int (*mode_valid)(struct intel_dvo_device *dvo, - struct drm_display_mode *mode); + enum drm_mode_status (*mode_valid)(struct intel_dvo_device *dvo, + struct drm_display_mode *mode); /* * Callback for preparing mode changes on an output -- 2.37.2.789.g6183377224-goog
