taglinefilesource code
IFF_UP741drivers/net/de600.cdev->flags &= ~IFF_UP;
IFF_UP766drivers/net/de620.cdev->flags &= ~IFF_UP;
IFF_UP931drivers/net/plip.cif(dev->flags&IFF_UP)
IFF_UP467drivers/net/ppp.cppp->dev->flags &= ~IFF_UP; /* down the device */
IFF_UP655drivers/net/ppp.cif (((struct ppp *) ppp)->dev->flags & IFF_UP)
IFF_UP1038drivers/net/ppp.cif ((ppp->dev->flags & IFF_UP) && ppp_do_ip(ppp, proto, c, count)) {
IFF_UP1708drivers/net/ppp.cif (!(dev->flags & IFF_UP)) {
IFF_UP1924drivers/net/ppp.cif (ppp->dev->flags & IFF_UP)
IFF_UP1937drivers/net/ppp.cif (ppp->dev->flags & IFF_UP)
IFF_UP602drivers/net/slip.cdev->flags|=IFF_UP;
IFF_UP265net/inet/dev.cdev->flags |= (IFF_UP | IFF_RUNNING);
IFF_UP357net/inet/dev.c(dev->slave->flags & IFF_UP))
IFF_UP902net/inet/dev.cif(!(dev->flags & IFF_UP))  /* Downed devices don't count */
IFF_UP1073net/inet/dev.cIFF_UP | IFF_BROADCAST | IFF_DEBUG | IFF_LOOPBACK |
IFF_UP1101net/inet/dev.cif ((old_flags & IFF_UP) && ((dev->flags & IFF_UP) == 0)) 
IFF_UP1111net/inet/dev.cret = (! (old_flags & IFF_UP) && (dev->flags & IFF_UP))
IFF_UP1117net/inet/dev.cdev->flags&=~IFF_UP;  /* Didn't open so down the if */
IFF_UP1319net/inet/dev.cif((slave->flags&(IFF_UP|IFF_RUNNING))!=(IFF_UP|IFF_RUNNING))
IFF_UP143net/inet/devinet.cif (!(dev->flags & IFF_UP))
IFF_UP227net/inet/devinet.cif (!(dev->flags & IFF_UP))
IFF_UP237net/inet/devinet.cif (!(dev->flags & IFF_UP))
IFF_UP1359net/inet/ip.cif (dev2->flags & IFF_UP)
IFF_UP1766net/inet/ip.cif (dev->flags & IFF_UP)
IFF_UP1844net/inet/ip.cif (dev->flags & IFF_UP)
IFF_UP195net/inet/packet.cif (dev->flags & IFF_UP) 
IFF_UP408net/inet/route.cif ((dev2->flags & IFF_UP) && dev2->pa_addr == gw)