[PATCH 4.9 171/223] phy: renesas: rcar-gen2: Fix memory leak at error paths

[Greg Kroah-Hartman]

[ Upstream commit d4a36e82924d3305a17ac987a510f3902df5a4b2 ]

This patch fixes memory leak at error paths of the probe function.
In for_each_child_of_node, if the loop returns, the driver should
call of_put_node() before returns.

Reported-by: Julia Lawall <julia.lawall@xxxxxxx>
Fixes: 1233f59f745b237 ("phy: Renesas R-Car Gen2 PHY driver")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/phy/phy-rcar-gen2.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/phy/phy-rcar-gen2.c b/drivers/phy/phy-rcar-gen2.c
index 97d4dd6ea924..aa02b19b7e0e 100644
--- a/drivers/phy/phy-rcar-gen2.c
+++ b/drivers/phy/phy-rcar-gen2.c
@@ -288,6 +288,7 @@ static int rcar_gen2_phy_probe(struct platform_device *pdev)
 		error = of_property_read_u32(np, "reg", &channel_num);
 		if (error || channel_num > 2) {
 			dev_err(dev, "Invalid \"reg\" property\n");
+			of_node_put(np);
 			return error;
 		}
 		channel->select_mask = select_mask[channel_num];
@@ -303,6 +304,7 @@ static int rcar_gen2_phy_probe(struct platform_device *pdev)
 						   &rcar_gen2_phy_ops);
 			if (IS_ERR(phy->phy)) {
 				dev_err(dev, "Failed to create PHY\n");
+				of_node_put(np);
 				return PTR_ERR(phy->phy);
 			}
 			phy_set_drvdata(phy->phy, phy);
-- 
2.20.1