[PATCH] net: dsa: Set valid phy interface type
From: Guenter Roeck <linux@roeck-us.net>
Date: 2015-02-17 05:23:58
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>
---
net/dsa/slave.c | 9 +++++++--
1 file 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 {
--
2.1.0