[PATCH 2/5] phy: add missing of_node_put

Julia Lawall
2018-05-23T19:07:13Z

The device node iterators perform an of_node_get on each iteration, so a
jump out of the loop requires an of_node_put.

The semantic patch that fixes this problem in the break case is as follows
(http://coccinelle.lip6.fr):

// <smpl>
@@
expression root,e;
local idexpression child;
iterator name for_each_child_of_node;
@@

for_each_child_of_node(root, child) {
... when != of_node_put(child)
when != e = child
+ of_node_put(child);
? break;
...
}
... when != child
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
drivers/phy/hisilicon/phy-hisi-inno-usb2.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/hisilicon/phy-hisi-inno-usb2.c b/drivers/phy/hisilicon/phy-hisi-inno-usb2.c
index 5243812..0da14b6 100644
--- a/drivers/phy/hisilicon/phy-hisi-inno-usb2.c
+++ b/drivers/phy/hisilicon/phy-hisi-inno-usb2.c
@@ -154,14 +154,18 @@ static int hisi_inno_phy_probe(struct platform_device *pdev)
struct phy *phy;

rst = of_reset_control_get_exclusive(child, NULL);
- if (IS_ERR(rst))
+ if (IS_ERR(rst)) {
+ of_node_put(child);
return PTR_ERR(rst);
+ }
priv->ports[i].utmi_rst = rst;
priv->ports[i].priv = priv;

phy = devm_phy_create(dev, child, &hisi_inno_phy_ops);
- if (IS_ERR(phy))
+ if (IS_ERR(phy)) {
+ of_node_put(child);
return PTR_ERR(phy);
+ }

phy_set_bus_width(phy, 8);
phy_set_drvdata(phy, &priv->ports[i]);
@@ -169,6 +173,7 @@ static int hisi_inno_phy_probe(struct platform_device *pdev)

if (i > INNO_PHY_PORT_NUM) {
dev_warn(dev, "Support %d ports in maximum\n", i);
+ of_node_put(child);
break;
}
}