net: phy: allow scanning busses with missing phys
Some MDIO busses will error out when trying to read a phy address with no phy present at that address. In that case, probing the bus will fail because __mdiobus_register() is scanning the bus for all possible phys addresses. In case MII_PHYSID1 returns -EIO or -ENODEV, consider there is no phy at this address and set the phy ID to 0xffffffff which is then properly handled in get_phy_device(). Suggested-by:Andrew Lunn <andrew@lunn.ch> Signed-off-by:
Alexandre Belloni <alexandre.belloni@bootlin.com> Reviewed-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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3be4aaf4
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