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, 2 insertions, 4 deletions

diff --git a/drivers/gpu/drm/mga/mga_dma.c b/drivers/gpu/drm/mga/mga_dma.c
index 1f2f9ca25901..a1d8dd15b131 100644
--- a/drivers/gpu/drm/mga/mga_dma.c
+++ b/drivers/gpu/drm/mga/mga_dma.c
@@ -1127,12 +1127,10 @@ int mga_dma_buffers(struct drm_device *dev, void *data,
 /**
  * Called just before the module is unloaded.
  */
-int mga_driver_unload(struct drm_device *dev)
+void mga_driver_unload(struct drm_device *dev)
 {
 	kfree(dev->dev_private);
 	dev->dev_private = NULL;
-
-	return 0;
 }
 
 /**
diff --git a/drivers/gpu/drm/mga/mga_drv.h b/drivers/gpu/drm/mga/mga_drv.h
index bb312339e0b0..d5ce829b3199 100644
--- a/drivers/gpu/drm/mga/mga_drv.h
+++ b/drivers/gpu/drm/mga/mga_drv.h
@@ -166,7 +166,7 @@ extern int mga_dma_reset(struct drm_device *dev, void *data,
 extern int mga_dma_buffers(struct drm_device *dev, void *data,
 			   struct drm_file *file_priv);
 extern int mga_driver_load(struct drm_device *dev, unsigned long flags);
-extern int mga_driver_unload(struct drm_device *dev);
+extern void mga_driver_unload(struct drm_device *dev);
 extern void mga_driver_lastclose(struct drm_device *dev);
 extern int mga_driver_dma_quiescent(struct drm_device *dev);