[PATCH] drm/i915: Fix return type of mode_valid function hook

[Nathan Huckleberry <nhuck@google.com>]

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@gmail.com>
Link: https://github.com/ClangBuiltLinux/linux/issues/1703
Cc: llvm@lists.linux.dev
Signed-off-by: Nathan Huckleberry <nhuck@google.com>
---
 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