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authorGuenter Roeck <linux@roeck-us.net>2015-02-17 05:23:51 (GMT)
committerDavid S. Miller <davem@davemloft.net>2015-02-17 18:37:39 (GMT)
commit19334920eaf7df3f69950b040ede6c7598425a5b (patch)
tree42c0b8a3df8bb7393c7e467f73feed8d6f7e722b /net/dsa
parent7afb8886a05be68e376655539a064ec672de8a8e (diff)
net: dsa: Set valid phy interface type
If the phy interface mode is not found in devicetree, or if devicetree is not configured, of_get_phy_mode returns -ENODEV. The current code sets the phy interface mode to the return value from of_get_phy_mode without checking if it is valid. This invalid phy interface mode is passed as parameter to of_phy_connect or to phy_connect_direct. This sets the phy interface mode to the invalid value, which in turn causes problems for any code using phydev->interface. Fixes: b31f65fb4383 ("net: dsa: slave: Fix autoneg for phys on switch MDIO bus") Fixes: 0d8bcdd383b8 ("net: dsa: allow for more complex PHY setups") Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa')
-rw-r--r--net/dsa/slave.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index d104ae1..f23dead 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -521,10 +521,13 @@ static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
struct device_node *phy_dn, *port_dn;
bool phy_is_fixed = false;
u32 phy_flags = 0;
- int ret;
+ int mode, ret;
port_dn = cd->port_dn[p->port];
- p->phy_interface = of_get_phy_mode(port_dn);
+ mode = of_get_phy_mode(port_dn);
+ if (mode < 0)
+ mode = PHY_INTERFACE_MODE_NA;
+ p->phy_interface = mode;
phy_dn = of_parse_phandle(port_dn, "phy-handle", 0);
if (of_phy_is_fixed_link(port_dn)) {
@@ -559,6 +562,8 @@ static int dsa_slave_phy_setup(struct dsa_slave_priv *p,
if (!p->phy)
return -ENODEV;
+ /* Use already configured phy mode */
+ p->phy_interface = p->phy->interface;
phy_connect_direct(slave_dev, p->phy, dsa_slave_adjust_link,
p->phy_interface);
} else {

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