phy: rockchip-usb: add missing of_node_put

for_each_available_child_of_node performs an of_node_get on each iteration,
so a return from the middle of the loop requires an of_node_put.

A simplified version of the semantic patch that finds this problem is as
follows (http://coccinelle.lip6.fr):

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

 for_each_available_child_of_node(root, child) {
   ... when != of_node_put(child)
       when != e = child
(
   return child;
|
*  return ...;
)
   ...
 }
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

diff --git a/drivers/phy/phy-rockchip-usb.c b/drivers/phy/phy-rockchip-usb.c
index 91d6f342c56596fc2e3fcff18213dba004546c3e..62c43c435194313e7d5ea7049d568cb673857da9 100644 (file)
--- a/drivers/phy/phy-rockchip-usb.c
+++ b/drivers/phy/phy-rockchip-usb.c
@@ -108,13 +108,16 @@ static int rockchip_usb_phy_probe(struct platform_device *pdev)
 
        for_each_available_child_of_node(dev->of_node, child) {
                rk_phy = devm_kzalloc(dev, sizeof(*rk_phy), GFP_KERNEL);
-               if (!rk_phy)
-                       return -ENOMEM;
+               if (!rk_phy) {
+                       err = -ENOMEM;
+                       goto put_child;
+               }
 
                if (of_property_read_u32(child, "reg", &reg_offset)) {
                        dev_err(dev, "missing reg property in node %s\n",
                                child->name);
-                       return -EINVAL;
+                       err = -EINVAL;
+                       goto put_child;
                }
 
                rk_phy->reg_offset = reg_offset;
@@ -127,18 +130,22 @@ static int rockchip_usb_phy_probe(struct platform_device *pdev)
                rk_phy->phy = devm_phy_create(dev, child, &ops);
                if (IS_ERR(rk_phy->phy)) {
                        dev_err(dev, "failed to create PHY\n");
-                       return PTR_ERR(rk_phy->phy);
+                       err = PTR_ERR(rk_phy->phy);
+                       goto put_child;
                }
                phy_set_drvdata(rk_phy->phy, rk_phy);
 
                /* only power up usb phy when it use, so disable it when init*/
                err = rockchip_usb_phy_power(rk_phy, 1);
                if (err)
-                       return err;
+                       goto put_child;
        }
 
        phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
        return PTR_ERR_OR_ZERO(phy_provider);
+put_child:
+       of_node_put(child);
+       return err;
 }
 
 static const struct of_device_id rockchip_usb_phy_dt_ids[] = {