From c795f3052b60b01e80485fad98c53e5e67d093c9 Mon Sep 17 00:00:00 2001
From: Tobias Jordan <Tobias.Jordan@elektrobit.com>
Date: Thu, 15 Feb 2018 15:34:55 +0100
Subject: [PATCH] gpu: ipu-v3: pre: fix device node leak in ipu_pre_lookup_by_phandle
Git-commit: c795f3052b60b01e80485fad98c53e5e67d093c9
Patch-mainline: v4.16-rc3
References: bsc#1051510

Before returning, call of_node_put() for the device node returned by
of_parse_phandle().

Fixes: d2a34232580a ("gpu: ipu-v3: add driver for Prefetch Resolve Engine")
Signed-off-by: Tobias Jordan <Tobias.Jordan@elektrobit.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/ipu-v3/ipu-pre.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/gpu/ipu-v3/ipu-pre.c
+++ b/drivers/gpu/ipu-v3/ipu-pre.c
@@ -116,11 +116,14 @@ ipu_pre_lookup_by_phandle(struct device
 		if (pre_node == pre->dev->of_node) {
 			mutex_unlock(&ipu_pre_list_mutex);
 			device_link_add(dev, pre->dev, DL_FLAG_AUTOREMOVE);
+			of_node_put(pre_node);
 			return pre;
 		}
 	}
 	mutex_unlock(&ipu_pre_list_mutex);
 
+	of_node_put(pre_node);
+
 	return NULL;
 }