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net: usb: lan78xx: Fix suspend/resume PHY register access error 

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: ce85e13ad6 ("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>
alistair/sunxi64-5.5-dsi
Cristian Birsan 2019-12-12 13:52:47 +02:00 committed by David S. Miller
parent 148709bc27
commit 20032b6358
1 changed files with 1 additions and 0 deletions
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drivers/net/usb/lan78xx.c
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@ -1808,6 +1808,7 @@ 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);