drm/mgag200: 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>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1502454794-28558-15-git-send-email-cakturk@gmail.com

drivers/gpu/drm/mgag200/mgag200_cursor.c

@@ -248,7 +248,7 @@ int mga_crtc_cursor_set(struct drm_crtc *crtc,
 out_unreserve1:
 	mgag200_bo_unreserve(pixels_2);
 out_unref:
-	drm_gem_object_unreference_unlocked(obj);
+	drm_gem_object_put_unlocked(obj);
 
 	return ret;
 }

drivers/gpu/drm/mgag200/mgag200_fb.c

@@ -232,7 +232,7 @@ static int mgag200fb_create(struct drm_fb_helper *helper,
 err_alloc_fbi:
 	vfree(sysram);
 err_sysram:
-	drm_gem_object_unreference_unlocked(gobj);
+	drm_gem_object_put_unlocked(gobj);
 
 	return ret;
 }
@@ -245,7 +245,7 @@ static int mga_fbdev_destroy(struct drm_device *dev,
 	drm_fb_helper_unregister_fbi(&mfbdev->helper);
 
 	if (mfb->obj) {
-		drm_gem_object_unreference_unlocked(mfb->obj);
+		drm_gem_object_put_unlocked(mfb->obj);
 		mfb->obj = NULL;
 	}
 	drm_fb_helper_fini(&mfbdev->helper);

drivers/gpu/drm/mgag200/mgag200_main.c

@@ -18,7 +18,7 @@ static void mga_user_framebuffer_destroy(struct drm_framebuffer *fb)
 {
 	struct mga_framebuffer *mga_fb = to_mga_framebuffer(fb);
 
-	drm_gem_object_unreference_unlocked(mga_fb->obj);
+	drm_gem_object_put_unlocked(mga_fb->obj);
 	drm_framebuffer_cleanup(fb);
 	kfree(fb);
 }
@@ -59,13 +59,13 @@ mgag200_user_framebuffer_create(struct drm_device *dev,
 
 	mga_fb = kzalloc(sizeof(*mga_fb), GFP_KERNEL);
 	if (!mga_fb) {
-		drm_gem_object_unreference_unlocked(obj);
+		drm_gem_object_put_unlocked(obj);
 		return ERR_PTR(-ENOMEM);
 	}
 
 	ret = mgag200_framebuffer_init(dev, mga_fb, mode_cmd, obj);
 	if (ret) {
-		drm_gem_object_unreference_unlocked(obj);
+		drm_gem_object_put_unlocked(obj);
 		kfree(mga_fb);
 		return ERR_PTR(ret);
 	}
@@ -317,7 +317,7 @@ int mgag200_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;
 
@@ -366,6 +366,6 @@ mgag200_dumb_mmap_offset(struct drm_file *file,
 	bo = gem_to_mga_bo(obj);
 	*offset = mgag200_bo_mmap_offset(bo);
 
-	drm_gem_object_unreference_unlocked(obj);
+	drm_gem_object_put_unlocked(obj);
 	return 0;
 }