[PATCH net-next] phylink: avoid attaching more than one PHY
flat view
STALE3227d
From: Russell King <hidden>
Date: 2017-12-20 23:23:36
Subsystem:
ethernet phy library, networking drivers, sff/sfp/sfp+ module support, the rest · Maintainers:
Andrew Lunn, Heiner Kallweit, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Russell King, Linus Torvalds
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 <redacted> --- 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;
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2.7.4