gpu: ipu-v3: pre: fix device node leak in ipu_pre_lookup_by_phandle

[ Upstream commit c795f3052b60b01e80485fad98c53e5e67d093c9 ]

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>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/ipu-v3/ipu-pre.c b/drivers/gpu/ipu-v3/ipu-pre.c
index c860a7997cb59c981557e01021d6a4278b2470ea..1d1612e28854b89b85deaf8f6f4a8c0898c67574 100644 (file)
--- a/drivers/gpu/ipu-v3/ipu-pre.c
+++ b/drivers/gpu/ipu-v3/ipu-pre.c
@@ -125,11 +125,14 @@ ipu_pre_lookup_by_phandle(struct device *dev, const char *name, int index)
                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;
 }