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Commit 5568363f authored by Florian Fainelli's avatar Florian Fainelli Committed by David S. Miller
Browse files

net: phy: Create sysfs reciprocal links for attached_dev/phydev 



There is currently no way for a program scanning /sys to know whether a
network device is attached to a particular PHY device, just like the PHY
device is not pointed back to its attached network device.

Create a symbolic link in the network device's namespace named "phydev"
which points to the PHY device and create a symbolic link in the PHY
device's namespace named "attached_dev" that points back to the network
device. These links are set up during phy_attach_direct() and removed
during phy_detach() for symetry.

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9226976f

drivers/net/phy/phy_device.c

+11 −0
Original line number Diff line number Diff line
@@ -960,6 +960,15 @@ int phy_attach_direct(struct net_device *dev, struct phy_device *phydev, 


	phydev->attached_dev = dev;

	dev->phydev = phydev;

	err = sysfs_create_link(&phydev->mdio.dev.kobj, &dev->dev.kobj,

				"attached_dev");

	if (err)

		goto error;



	err = sysfs_create_link(&dev->dev.kobj, &phydev->mdio.dev.kobj,

				"phydev");

	if (err)

		goto error;



	phydev->dev_flags = flags;
@@ -1050,6 +1059,8 @@ void phy_detach(struct phy_device *phydev) 
	struct mii_bus *bus;

	int i;



	sysfs_remove_link(&dev->dev.kobj, "phydev");

	sysfs_remove_link(&phydev->mdio.dev.kobj, "attached_dev");

	phydev->attached_dev->phydev = NULL;

	phydev->attached_dev = NULL;

	phy_suspend(phydev);