646 static int ppp_bridge_channels(struct channel *pch, struct channel *pchb)  in ppp_bridge_channels()  argument
654 	refcount_inc(&pchb->file.refcnt);  in ppp_bridge_channels()
655 	rcu_assign_pointer(pch->bridge, pchb);  in ppp_bridge_channels()
658 	spin_lock(&pchb->upl);  in ppp_bridge_channels()
659 	if (rcu_dereference_protected(pchb->ppp, lockdep_is_held(&pchb->upl)) ||  in ppp_bridge_channels()
660 	    rcu_dereference_protected(pchb->bridge, lockdep_is_held(&pchb->upl))) {  in ppp_bridge_channels()
661 		spin_unlock(&pchb->upl);  in ppp_bridge_channels()
665 	rcu_assign_pointer(pchb->bridge, pch);  in ppp_bridge_channels()
666 	spin_unlock(&pchb->upl);  in ppp_bridge_channels()
673 	pchb = rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl));  in ppp_bridge_channels()
678 	if (pchb)  in ppp_bridge_channels()
679 		if (refcount_dec_and_test(&pchb->file.refcnt))  in ppp_bridge_channels()
680 			ppp_destroy_channel(pchb);  in ppp_bridge_channels()
687 	struct channel *pchb, *pchbb;  in ppp_unbridge_channels()  local
690 	pchb = rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl));  in ppp_unbridge_channels()
691 	if (!pchb) {  in ppp_unbridge_channels()
703 	spin_lock(&pchb->upl);  in ppp_unbridge_channels()
704 	pchbb = rcu_dereference_protected(pchb->bridge, lockdep_is_held(&pchb->upl));  in ppp_unbridge_channels()
706 		RCU_INIT_POINTER(pchb->bridge, NULL);  in ppp_unbridge_channels()
707 	spin_unlock(&pchb->upl);  in ppp_unbridge_channels()
715 	if (refcount_dec_and_test(&pchb->file.refcnt))  in ppp_unbridge_channels()
716 		ppp_destroy_channel(pchb);  in ppp_unbridge_channels()
756 		struct channel *pch, *pchb;  in ppp_ioctl()  local
779 			pchb = ppp_find_channel(pn, unit);  in ppp_ioctl()
783 			if (pchb)  in ppp_ioctl()
784 				refcount_inc(&pchb->file.refcnt);  in ppp_ioctl()
786 			if (!pchb)  in ppp_ioctl()
788 			err = ppp_bridge_channels(pch, pchb);  in ppp_ioctl()
790 			if (refcount_dec_and_test(&pchb->file.refcnt))  in ppp_ioctl()
791 				ppp_destroy_channel(pchb);  in ppp_ioctl()
2295 	struct channel *pchb;  in ppp_channel_bridge_input()  local
2298 	pchb = rcu_dereference(pch->bridge);  in ppp_channel_bridge_input()
2299 	if (!pchb)  in ppp_channel_bridge_input()
2302 	spin_lock_bh(&pchb->downl);  in ppp_channel_bridge_input()
2303 	if (!pchb->chan) {  in ppp_channel_bridge_input()
2309 	skb_scrub_packet(skb, !net_eq(pch->chan_net, pchb->chan_net));  in ppp_channel_bridge_input()
2310 	if (!pchb->chan->ops->start_xmit(pchb->chan, skb))  in ppp_channel_bridge_input()
2314 	spin_unlock_bh(&pchb->downl);  in ppp_channel_bridge_input()
2319 	return !!pchb;  in ppp_channel_bridge_input()