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Commit 6a18a67a authored by Cristian Birsan's avatar Cristian Birsan Committed by Greg Kroah-Hartman
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net: usb: lan78xx: Fix suspend/resume PHY register access error 



[ 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: ce85e13a ("lan78xx: Update to use phylib instead of mii_if_info.")
Signed-off-by: default avatarCristian Birsan <cristian.birsan@microchip.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e5bcc3b9

drivers/net/usb/lan78xx.c

+1 −0
Original line number Diff line number Diff line
@@ -1763,6 +1763,7 @@ static int lan78xx_mdio_init(struct lan78xx_net *dev) 
	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);