Attaching more than one PHY to phylink is bad news, as we store a
pointer to the PHY in a single location. Error out if more than one
PHY is attempted to be attached.
Signed-off-by: Russell King <rmk+ker...@armlinux.org.uk>
---
drivers/net/phy/phylink.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index db5d5726ced9..82166a26f5c6 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -726,6 +726,9 @@ int phylink_connect_phy(struct phylink *pl, struct
phy_device *phy)
phy_interface_mode_is_8023z(pl->link_interface))))
return -EINVAL;
+ if (pl->phydev)
+ return -EBUSY;
+
/* Use PHY device/driver interface */
if (pl->link_interface == PHY_INTERFACE_MODE_NA) {
pl->link_interface = phy->interface;
--
2.7.4
