drm/mediatek: clean up driver data initialisation

The platform and drm devices are only used to look up the drm device and
its driver data respectively when initialising the driver data during
bind().

Drop the reference counts as soon as they have been used to make the
code more readable.

Note that the crtc count is never incremented on lookup failures.

Signed-off-by: Johan Hovold <[email protected]>
Reviewed-by: CK Hu <[email protected]>
Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Link: https://patchwork.kernel.org/project/dri-devel/patch/[email protected]/
Signed-off-by: Chun-Kuang Hu <[email protected]>

Author: jhovold

drivers/gpu/drm/mediatek/mtk_drm_drv.c

@@ -394,12 +394,14 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev)
 			continue;
 
 		drm_dev = device_find_child(&pdev->dev, NULL, mtk_drm_match);
+		put_device(&pdev->dev);
 		if (!drm_dev)
-			goto next_put_device_pdev_dev;
+			continue;
 
 		temp_drm_priv = dev_get_drvdata(drm_dev);
+		put_device(drm_dev);
 		if (!temp_drm_priv)
-			goto next_put_device_drm_dev;
+			continue;
 
 		if (temp_drm_priv->data->main_len)
 			all_drm_priv[CRTC_MAIN] = temp_drm_priv;
@@ -411,12 +413,6 @@ static bool mtk_drm_get_all_drm_priv(struct device *dev)
 		if (temp_drm_priv->mtk_drm_bound)
 			cnt++;
 
-next_put_device_drm_dev:
-		put_device(drm_dev);
-
-next_put_device_pdev_dev:
-		put_device(&pdev->dev);
-
 		if (cnt == MAX_CRTC) {
 			of_node_put(node);
 			break;