drm: remove dumb_destroy callback

Not used by any driver any more.

Signed-off-by: Christian König <[e-mail]>
Reviewed-by: Thomas Zimmermann <[e-mail]>
Tested-by: Thomas Zimmermann <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/drm_dumb_buffers.c

···
 	if (!dev->driver->dumb_create)
 		return -ENOSYS;
 
-	if (dev->driver->dumb_destroy)
-		return dev->driver->dumb_destroy(file_priv, dev, handle);
-	else
-		return drm_gem_dumb_destroy(file_priv, dev, handle);
+	return drm_gem_handle_delete(file_priv, handle);
 }
 
 int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,

drivers/gpu/drm/drm_gem.c

···
 }
 EXPORT_SYMBOL_GPL(drm_gem_dumb_map_offset);
 
-int drm_gem_dumb_destroy(struct drm_file *file,
-			 struct drm_device *dev,
-			 u32 handle)
-{
-	return drm_gem_handle_delete(file, handle);
-}
-
 /**
  * drm_gem_handle_create_tail - internal functions to create a handle
  * @file_priv: drm file-private structure to register the handle for

drivers/gpu/drm/drm_internal.h

···
 int drm_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map);
 void drm_gem_vunmap(struct drm_gem_object *obj, struct iosys_map *map);
 
-int drm_gem_dumb_destroy(struct drm_file *file, struct drm_device *dev,
-			 u32 handle);
-
 /* drm_debugfs.c drm_debugfs_crc.c */
 #if defined(CONFIG_DEBUG_FS)
 int drm_debugfs_init(struct drm_minor *minor, int minor_id,

include/drm/drm_drv.h

···
 	int (*dumb_map_offset)(struct drm_file *file_priv,
 			       struct drm_device *dev, uint32_t handle,
 			       uint64_t *offset);
-	/**
-	 * @dumb_destroy:
-	 *
-	 * This destroys the userspace handle for the given dumb backing storage buffer.
-	 * Since buffer objects must be reference counted in the kernel a buffer object
-	 * won't be immediately freed if a framebuffer modeset object still uses it.
-	 *
-	 * Called by the user via ioctl.
-	 *
-	 * The default implementation is drm_gem_dumb_destroy(). GEM based drivers
-	 * must not overwrite this.
-	 *
-	 * Returns:
-	 *
-	 * Zero on success, negative errno on failure.
-	 */
-	int (*dumb_destroy)(struct drm_file *file_priv,
-			    struct drm_device *dev,
-			    uint32_t handle);
 
 	/** @major: driver major number */
 	int major;