drm: vboxvideo: switch to drm_*_get(), drm_*_put() helpers

Use drm_*_get() and drm_*_put() helpers instead of drm_*_reference()
and drm_*_unreference() helpers.

drm_*_reference() and drm_*_unreference() functions are just
compatibility alias for drm_*_get() and drm_*_put() and should not be
used by new code. So convert all users of compatibility functions to
use the new APIs.

Generated by: scripts/coccinelle/api/drm-get-put.cocci

Signed-off-by: Cihangir Akturk <cakturk@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1502454794-28558-29-git-send-email-cakturk@gmail.com

drivers/staging/vboxvideo/vbox_fb.c

@@ -343,7 +343,7 @@ void vbox_fbdev_fini(struct drm_device *dev)
 				vbox_bo_unpin(bo);
 			vbox_bo_unreserve(bo);
 		}
-		drm_gem_object_unreference_unlocked(afb->obj);
+		drm_gem_object_put_unlocked(afb->obj);
 		afb->obj = NULL;
 	}
 	drm_fb_helper_fini(&fbdev->helper);

drivers/staging/vboxvideo/vbox_main.c

@@ -40,7 +40,7 @@ static void vbox_user_framebuffer_destroy(struct drm_framebuffer *fb)
 	struct vbox_framebuffer *vbox_fb = to_vbox_framebuffer(fb);
 
 	if (vbox_fb->obj)
-		drm_gem_object_unreference_unlocked(vbox_fb->obj);
+		drm_gem_object_put_unlocked(vbox_fb->obj);
 
 	drm_framebuffer_cleanup(fb);
 	kfree(fb);
@@ -198,7 +198,7 @@ static struct drm_framebuffer *vbox_user_framebuffer_create(
 err_free_vbox_fb:
 	kfree(vbox_fb);
 err_unref_obj:
-	drm_gem_object_unreference_unlocked(obj);
+	drm_gem_object_put_unlocked(obj);
 	return ERR_PTR(ret);
 }
 
@@ -472,7 +472,7 @@ int vbox_dumb_create(struct drm_file *file,
 		return ret;
 
 	ret = drm_gem_handle_create(file, gobj, &handle);
-	drm_gem_object_unreference_unlocked(gobj);
+	drm_gem_object_put_unlocked(gobj);
 	if (ret)
 		return ret;
 
@@ -525,7 +525,7 @@ vbox_dumb_mmap_offset(struct drm_file *file,
 	bo = gem_to_vbox_bo(obj);
 	*offset = vbox_bo_mmap_offset(bo);
 
-	drm_gem_object_unreference(obj);
+	drm_gem_object_put(obj);
 	ret = 0;
 
 out_unlock:

drivers/staging/vboxvideo/vbox_mode.c

@@ -812,7 +812,7 @@ out_unmap_bo:
 out_unreserve_bo:
 	vbox_bo_unreserve(bo);
 out_unref_obj:
-	drm_gem_object_unreference_unlocked(obj);
+	drm_gem_object_put_unlocked(obj);
 
 	return ret;
 }