NAME
netdev_has_upper_dev - Check if device is linked to an upper device
SYNOPSIS
bool netdev_has_upper_dev(struct net_device * dev, struct net_device * upper_dev);
ARGUMENTS
dev
device
upper_dev
upper device to check
DESCRIPTION
Find out if a device is linked to specified upper device and return true in case it is. Note that this checks only immediate upper device, not through a complete stack of devices. The caller must hold the RTNL lock.