openwrt_lede/target/linux/brcm2708/patches-4.4/0448-gpu-drm-vc4_hdmi-add-missing-of_node_put-after-calli.patch

From 46c6aaecefb953f629a7dddd2cb1eb70d3d6c954 Mon Sep 17 00:00:00 2001
From: Peter Chen <peter.chen@nxp.com>
Date: Tue, 5 Jul 2016 10:04:54 +0800
Subject: [PATCH] gpu: drm: vc4_hdmi: add missing of_node_put after calling
 of_parse_phandle

of_node_put needs to be called when the device node which is got
from of_parse_phandle has finished using.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
(cherry picked from commit 027a697677b0d5ff211773596d96f84078ceda80)
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -467,12 +467,6 @@ static int vc4_hdmi_bind(struct device *
 	if (IS_ERR(hdmi->hd_regs))
 		return PTR_ERR(hdmi->hd_regs);
 
-	ddc_node = of_parse_phandle(dev->of_node, "ddc", 0);
-	if (!ddc_node) {
-		DRM_ERROR("Failed to find ddc node in device tree\n");
-		return -ENODEV;
-	}
-
 	hdmi->pixel_clock = devm_clk_get(dev, "pixel");
 	if (IS_ERR(hdmi->pixel_clock)) {
 		DRM_ERROR("Failed to get pixel clock\n");
@@ -484,7 +478,14 @@ static int vc4_hdmi_bind(struct device *
 		return PTR_ERR(hdmi->hsm_clock);
 	}
 
+	ddc_node = of_parse_phandle(dev->of_node, "ddc", 0);
+	if (!ddc_node) {
+		DRM_ERROR("Failed to find ddc node in device tree\n");
+		return -ENODEV;
+	}
+
 	hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node);
+	of_node_put(ddc_node);
 	if (!hdmi->ddc) {
 		DRM_DEBUG("Failed to get ddc i2c adapter by node\n");
 		return -EPROBE_DEFER;