phy: cygnus: pcie: 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>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

diff --git a/drivers/phy/phy-bcm-cygnus-pcie.c b/drivers/phy/phy-bcm-cygnus-pcie.c
index 7ad72b7d2b981b6ff4ae59011fdd5e6c5538ef51..082c03f6438f796af868cb83127f1ce9ca56f83b 100644 (file)
--- a/drivers/phy/phy-bcm-cygnus-pcie.c
+++ b/drivers/phy/phy-bcm-cygnus-pcie.c
@@ -128,6 +128,7 @@ static int cygnus_pcie_phy_probe(struct platform_device *pdev)
        struct phy_provider *provider;
        struct resource *res;
        unsigned cnt = 0;
+       int ret;
 
        if (of_get_child_count(node) == 0) {
                dev_err(dev, "PHY no child node\n");
@@ -154,24 +155,28 @@ static int cygnus_pcie_phy_probe(struct platform_device *pdev)
                if (of_property_read_u32(child, "reg", &id)) {
                        dev_err(dev, "missing reg property for %s\n",
                                child->name);
-                       return -EINVAL;
+                       ret = -EINVAL;
+                       goto put_child;
                }
 
                if (id >= MAX_NUM_PHYS) {
                        dev_err(dev, "invalid PHY id: %u\n", id);
-                       return -EINVAL;
+                       ret = -EINVAL;
+                       goto put_child;
                }
 
                if (core->phys[id].phy) {
                        dev_err(dev, "duplicated PHY id: %u\n", id);
-                       return -EINVAL;
+                       ret = -EINVAL;
+                       goto put_child;
                }
 
                p = &core->phys[id];
                p->phy = devm_phy_create(dev, child, &cygnus_pcie_phy_ops);
                if (IS_ERR(p->phy)) {
                        dev_err(dev, "failed to create PHY\n");
-                       return PTR_ERR(p->phy);
+                       ret = PTR_ERR(p->phy);
+                       goto put_child;
                }
 
                p->core = core;
@@ -191,6 +196,9 @@ static int cygnus_pcie_phy_probe(struct platform_device *pdev)
        dev_dbg(dev, "registered %u PCIe PHY(s)\n", cnt);
 
        return 0;
+put_child:
+       of_node_put(child);
+       return ret;
 }
 
 static const struct of_device_id cygnus_pcie_phy_match_table[] = {