618 static int ppp_bridge_channels(struct channel *pch, struct channel *pchb)  in ppp_bridge_channels()  argument
626 	refcount_inc(&pchb->file.refcnt);  in ppp_bridge_channels()
627 	rcu_assign_pointer(pch->bridge, pchb);  in ppp_bridge_channels()
630 	write_lock_bh(&pchb->upl);  in ppp_bridge_channels()
631 	if (pchb->ppp ||  in ppp_bridge_channels()
632 	    rcu_dereference_protected(pchb->bridge, lockdep_is_held(&pchb->upl))) {  in ppp_bridge_channels()
633 		write_unlock_bh(&pchb->upl);  in ppp_bridge_channels()
637 	rcu_assign_pointer(pchb->bridge, pch);  in ppp_bridge_channels()
638 	write_unlock_bh(&pchb->upl);  in ppp_bridge_channels()
645 	pchb = rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl));  in ppp_bridge_channels()
650 	if (pchb)  in ppp_bridge_channels()
651 		if (refcount_dec_and_test(&pchb->file.refcnt))  in ppp_bridge_channels()
652 			ppp_destroy_channel(pchb);  in ppp_bridge_channels()
659 	struct channel *pchb, *pchbb;  in ppp_unbridge_channels()  local
662 	pchb = rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl));  in ppp_unbridge_channels()
663 	if (!pchb) {  in ppp_unbridge_channels()
675 	write_lock_bh(&pchb->upl);  in ppp_unbridge_channels()
676 	pchbb = rcu_dereference_protected(pchb->bridge, lockdep_is_held(&pchb->upl));  in ppp_unbridge_channels()
678 		RCU_INIT_POINTER(pchb->bridge, NULL);  in ppp_unbridge_channels()
679 	write_unlock_bh(&pchb->upl);  in ppp_unbridge_channels()
687 	if (refcount_dec_and_test(&pchb->file.refcnt))  in ppp_unbridge_channels()
688 		ppp_destroy_channel(pchb);  in ppp_unbridge_channels()
728 		struct channel *pch, *pchb;  in ppp_ioctl()  local
751 			pchb = ppp_find_channel(pn, unit);  in ppp_ioctl()
755 			if (pchb)  in ppp_ioctl()
756 				refcount_inc(&pchb->file.refcnt);  in ppp_ioctl()
758 			if (!pchb)  in ppp_ioctl()
760 			err = ppp_bridge_channels(pch, pchb);  in ppp_ioctl()
762 			if (refcount_dec_and_test(&pchb->file.refcnt))  in ppp_ioctl()
763 				ppp_destroy_channel(pchb);  in ppp_ioctl()
2242 	struct channel *pchb;  in ppp_channel_bridge_input()  local
2245 	pchb = rcu_dereference(pch->bridge);  in ppp_channel_bridge_input()
2246 	if (!pchb)  in ppp_channel_bridge_input()
2249 	spin_lock(&pchb->downl);  in ppp_channel_bridge_input()
2250 	if (!pchb->chan) {  in ppp_channel_bridge_input()
2256 	skb_scrub_packet(skb, !net_eq(pch->chan_net, pchb->chan_net));  in ppp_channel_bridge_input()
2257 	if (!pchb->chan->ops->start_xmit(pchb->chan, skb))  in ppp_channel_bridge_input()
2261 	spin_unlock(&pchb->downl);  in ppp_channel_bridge_input()
2266 	return !!pchb;  in ppp_channel_bridge_input()