dev_set_promiscuity - update promiscuity count on a device
void dev_set_promiscuity (struct net_device * dev, int inc);
dev device inc modifier
Add or remove promsicuity from a device. While the count in the device remains above zero the interface remains promiscuous. Once it hits zero the device reverts back to normal filtering operation. A negative inc value is used to drop promiscuity on the device.