drm/meson: encoder_hdmi: Fix refcount leak in meson_encoder_hdmi_init

of_graph_get_remote_node() returns remote device nodepointer with
refcount incremented, we should use of_node_put() on it when done.
Add missing of_node_put() to avoid refcount leak.

Fixes: e67f6037 ("drm/meson: split out encoder from meson_dw_hdmi")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220601033927.47814-3-linmq006@gmail.com

drivers/gpu/drm/meson/meson_encoder_hdmi.c

@@ -371,7 +371,8 @@ int meson_encoder_hdmi_init(struct meson_drm *priv)
 	meson_encoder_hdmi->next_bridge = of_drm_find_bridge(remote);
 	if (!meson_encoder_hdmi->next_bridge) {
 		dev_err(priv->dev, "Failed to find HDMI transceiver bridge\n");
-		return -EPROBE_DEFER;
+		ret = -EPROBE_DEFER;
+		goto err_put_node;
 	}
 
 	/* HDMI Encoder Bridge */
@@ -389,7 +390,7 @@ int meson_encoder_hdmi_init(struct meson_drm *priv)
 				      DRM_MODE_ENCODER_TMDS);
 	if (ret) {
 		dev_err(priv->dev, "Failed to init HDMI encoder: %d\n", ret);
-		return ret;
+		goto err_put_node;
 	}
 
 	meson_encoder_hdmi->encoder.possible_crtcs = BIT(0);
@@ -399,7 +400,7 @@ int meson_encoder_hdmi_init(struct meson_drm *priv)
 				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 	if (ret) {
 		dev_err(priv->dev, "Failed to attach bridge: %d\n", ret);
-		return ret;
+		goto err_put_node;
 	}
 
 	/* Initialize & attach Bridge Connector */
@@ -407,7 +408,8 @@ int meson_encoder_hdmi_init(struct meson_drm *priv)
 							&meson_encoder_hdmi->encoder);
 	if (IS_ERR(meson_encoder_hdmi->connector)) {
 		dev_err(priv->dev, "Unable to create HDMI bridge connector\n");
-		return PTR_ERR(meson_encoder_hdmi->connector);
+		ret = PTR_ERR(meson_encoder_hdmi->connector);
+		goto err_put_node;
 	}
 	drm_connector_attach_encoder(meson_encoder_hdmi->connector,
 				     &meson_encoder_hdmi->encoder);
@@ -434,6 +436,7 @@ int meson_encoder_hdmi_init(struct meson_drm *priv)
 	meson_encoder_hdmi->connector->ycbcr_420_allowed = true;
 
 	pdev = of_find_device_by_node(remote);
+	of_node_put(remote);
 	if (pdev) {
 		struct cec_connector_info conn_info;
 		struct cec_notifier *notifier;
@@ -452,4 +455,8 @@ int meson_encoder_hdmi_init(struct meson_drm *priv)
 	dev_dbg(priv->dev, "HDMI encoder initialized\n");
 
 	return 0;
+
+err_put_node:
+	of_node_put(remote);
+	return ret;
 }