On Tue, Sep 13, 2022 at 01:55:27PM -0700, Nathan Huckleberry wrote:
> 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 <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>
> ---
> 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
>
