From fe1c3ef201c1ae629df9ee60b64e7030f6e703fb Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 20 Dec 2017 23:23:33 +0000 Subject: [PATCH] phylink: avoid attaching more than one PHY 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 Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- 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 f7a7774..2ec140e 100644 --- a/drivers/net/phy/phylink.c +++ b/drivers/net/phy/phylink.c @@ -725,6 +725,9 @@ 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