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authorWen Yang <wen.yang99@zte.com.cn>2019-02-25 15:22:19 +0800
committerDavid S. Miller <davem@davemloft.net>2019-02-25 09:34:52 -0800
commit9919a363a5cb57c2b64c4803b4d2dd45e90bf230 (patch)
tree27b0c4d86bcadf5e365ab70367abb1b3cde2f3e0 /net
parent71828b2240692cec0e68b8d867bc00e1745e7fae (diff)
net: dsa: fix a leaked reference by adding missing of_node_put
The call to of_parse_phandle returns a node pointer with refcount incremented thus it must be explicitly decremented after the last usage. Detected by coccinelle with the following warnings: ./net/dsa/port.c:294:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 284, but without a corresponding object release within this function. ./net/dsa/dsa2.c:627:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 618, but without a corresponding object release within this function. ./net/dsa/dsa2.c:630:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 618, but without a corresponding object release within this function. ./net/dsa/dsa2.c:636:3-9: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 618, but without a corresponding object release within this function. ./net/dsa/dsa2.c:639:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 618, but without a corresponding object release within this function. Signed-off-by: Wen Yang <wen.yang99@zte.com.cn> Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Vivien Didelot <vivien.didelot@gmail.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Vivien Didelot <vivien.didelot@gmail.com> Cc: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/dsa/dsa2.c16
-rw-r--r--net/dsa/port.c1
2 files changed, 11 insertions, 6 deletions
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index a1917025e155..410f19148106 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -612,8 +612,8 @@ static int dsa_switch_parse_ports_of(struct dsa_switch *ds,
{
struct device_node *ports, *port;
struct dsa_port *dp;
+ int err = 0;
u32 reg;
- int err;
ports = of_get_child_by_name(dn, "ports");
if (!ports) {
@@ -624,19 +624,23 @@ static int dsa_switch_parse_ports_of(struct dsa_switch *ds,
for_each_available_child_of_node(ports, port) {
err = of_property_read_u32(port, "reg", &reg);
if (err)
- return err;
+ goto out_put_node;
- if (reg >= ds->num_ports)
- return -EINVAL;
+ if (reg >= ds->num_ports) {
+ err = -EINVAL;
+ goto out_put_node;
+ }
dp = &ds->ports[reg];
err = dsa_port_parse_of(dp, port);
if (err)
- return err;
+ goto out_put_node;
}
- return 0;
+out_put_node:
+ of_node_put(ports);
+ return err;
}
static int dsa_switch_parse_member_of(struct dsa_switch *ds,
diff --git a/net/dsa/port.c b/net/dsa/port.c
index 2a2a878b5ce3..c2261697ee83 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -292,6 +292,7 @@ static struct phy_device *dsa_port_get_phy_device(struct dsa_port *dp)
return ERR_PTR(-EPROBE_DEFER);
}
+ of_node_put(phy_dn);
return phydev;
}