drm: Change the return type of the unload hook to void

The integer returned by the unload hook is ignored by the drm core, so
let's make it void.

This patch was created using the following Coccinelle semantic script
(except for the declaration and comment in drm_drv.h):

Compile-tested only.

// <smpl>
@ get_name @
struct drm_driver drv;
identifier fn;
@@
drv.unload = fn;

@ replace_type @
identifier get_name.fn;
@@
- int
+ void
fn (...)
{
...
}

@ remove_return_param @
identifier get_name.fn;
@@
void fn (...)
{
<...
if (...)
return
- ...
;
...>
 }

@ drop_final_return @
identifier get_name.fn;
@@
void fn (...)
{
...

- return 0;
}
// </smpl>

Suggested-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
Acked-by: Christian König <christian.koenig@amd.com>.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20170106175731.29196-1-krisman@collabora.co.uk

2 files changed, 3 insertions, 4 deletions

diff --git a/drivers/gpu/drm/mgag200/mgag200_drv.h b/drivers/gpu/drm/mgag200/mgag200_drv.h
index 87e0934773de..0d6e998d63e6 100644
--- a/drivers/gpu/drm/mgag200/mgag200_drv.h
+++ b/drivers/gpu/drm/mgag200/mgag200_drv.h
@@ -258,7 +258,7 @@ int mgag200_framebuffer_init(struct drm_device *dev,
 
 
 int mgag200_driver_load(struct drm_device *dev, unsigned long flags);
-int mgag200_driver_unload(struct drm_device *dev);
+void mgag200_driver_unload(struct drm_device *dev);
 int mgag200_gem_create(struct drm_device *dev,
 		   u32 size, bool iskernel,
 		       struct drm_gem_object **obj);
diff --git a/drivers/gpu/drm/mgag200/mgag200_main.c b/drivers/gpu/drm/mgag200/mgag200_main.c
index da8ba6c154e3..dce8a3eb5a10 100644
--- a/drivers/gpu/drm/mgag200/mgag200_main.c
+++ b/drivers/gpu/drm/mgag200/mgag200_main.c
@@ -264,18 +264,17 @@ err_mm:
 	return r;
 }
 
-int mgag200_driver_unload(struct drm_device *dev)
+void mgag200_driver_unload(struct drm_device *dev)
 {
 	struct mga_device *mdev = dev->dev_private;
 
 	if (mdev == NULL)
-		return 0;
+		return;
 	mgag200_modeset_fini(mdev);
 	mgag200_fbdev_fini(mdev);
 	drm_mode_config_cleanup(dev);
 	mgag200_mm_fini(mdev);
 	dev->dev_private = NULL;
-	return 0;
 }
 
 int mgag200_gem_create(struct drm_device *dev,