From: Cristian Birsan cristian.birsan@microchip.com
[ Upstream commit 20032b63586ac6c28c936dff696981159913a13f ]
Lan78xx driver accesses the PHY registers through MDIO bus over USB connection. When performing a suspend/resume, the PHY registers can be accessed before the USB connection is resumed. This will generate an error and will prevent the device to resume correctly. This patch adds the dependency between the MDIO bus and USB device to allow correct handling of suspend/resume.
Fixes: ce85e13ad6ef ("lan78xx: Update to use phylib instead of mii_if_info.") Signed-off-by: Cristian Birsan cristian.birsan@microchip.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/usb/lan78xx.c | 1 + 1 file changed, 1 insertion(+)
--- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -1448,6 +1448,7 @@ static int lan78xx_mdio_init(struct lan7 dev->mdiobus->read = lan78xx_mdiobus_read; dev->mdiobus->write = lan78xx_mdiobus_write; dev->mdiobus->name = "lan78xx-mdiobus"; + dev->mdiobus->parent = &dev->udev->dev;
snprintf(dev->mdiobus->id, MII_BUS_ID_SIZE, "usb-%03d:%03d", dev->udev->bus->busnum, dev->udev->devnum);