[PATCH 4.14 098/496] gpu: ipu-v3: prg: fix device node leak in ipu_prg_lookup_by_phandle

[Greg Kroah-Hartman]

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tobias Jordan <tobias.jor...@elektrobit.com>

[ Upstream commit 3addaba8141bc6a4f649a48f46e552af32922147 ]

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

Fixes: ea9c260514c1 ("gpu: ipu-v3: add driver for Prefetch Resolve Gasket")
Signed-off-by: Tobias Jordan <tobias.jor...@elektrobit.com>
Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/gpu/ipu-v3/ipu-prg.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/gpu/ipu-v3/ipu-prg.c
+++ b/drivers/gpu/ipu-v3/ipu-prg.c
@@ -101,11 +101,14 @@ ipu_prg_lookup_by_phandle(struct device
                        mutex_unlock(&ipu_prg_list_mutex);
                        device_link_add(dev, prg->dev, DL_FLAG_AUTOREMOVE);
                        prg->id = ipu_id;
+                       of_node_put(prg_node);
                        return prg;
                }
        }
        mutex_unlock(&ipu_prg_list_mutex);
 
+       of_node_put(prg_node);
+
        return NULL;
 }