624 static int ppp_bridge_channels(struct channel *pch, struct channel *pchb)  in ppp_bridge_channels()  argument
632 	refcount_inc(&pchb->file.refcnt);  in ppp_bridge_channels()
633 	rcu_assign_pointer(pch->bridge, pchb);  in ppp_bridge_channels()
636 	write_lock_bh(&pchb->upl);  in ppp_bridge_channels()
637 	if (pchb->ppp ||  in ppp_bridge_channels()
638 	    rcu_dereference_protected(pchb->bridge, lockdep_is_held(&pchb->upl))) {  in ppp_bridge_channels()
639 		write_unlock_bh(&pchb->upl);  in ppp_bridge_channels()
643 	rcu_assign_pointer(pchb->bridge, pch);  in ppp_bridge_channels()
644 	write_unlock_bh(&pchb->upl);  in ppp_bridge_channels()
651 	pchb = rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl));  in ppp_bridge_channels()
656 	if (pchb)  in ppp_bridge_channels()
657 		if (refcount_dec_and_test(&pchb->file.refcnt))  in ppp_bridge_channels()
658 			ppp_destroy_channel(pchb);  in ppp_bridge_channels()
665 	struct channel *pchb, *pchbb;  in ppp_unbridge_channels()  local
668 	pchb = rcu_dereference_protected(pch->bridge, lockdep_is_held(&pch->upl));  in ppp_unbridge_channels()
669 	if (!pchb) {  in ppp_unbridge_channels()
681 	write_lock_bh(&pchb->upl);  in ppp_unbridge_channels()
682 	pchbb = rcu_dereference_protected(pchb->bridge, lockdep_is_held(&pchb->upl));  in ppp_unbridge_channels()
684 		RCU_INIT_POINTER(pchb->bridge, NULL);  in ppp_unbridge_channels()
685 	write_unlock_bh(&pchb->upl);  in ppp_unbridge_channels()
693 	if (refcount_dec_and_test(&pchb->file.refcnt))  in ppp_unbridge_channels()
694 		ppp_destroy_channel(pchb);  in ppp_unbridge_channels()
734 		struct channel *pch, *pchb;  in ppp_ioctl()  local
757 			pchb = ppp_find_channel(pn, unit);  in ppp_ioctl()
761 			if (pchb)  in ppp_ioctl()
762 				refcount_inc(&pchb->file.refcnt);  in ppp_ioctl()
764 			if (!pchb)  in ppp_ioctl()
766 			err = ppp_bridge_channels(pch, pchb);  in ppp_ioctl()
768 			if (refcount_dec_and_test(&pchb->file.refcnt))  in ppp_ioctl()
769 				ppp_destroy_channel(pchb);  in ppp_ioctl()
2250 	struct channel *pchb;  in ppp_channel_bridge_input()  local
2253 	pchb = rcu_dereference(pch->bridge);  in ppp_channel_bridge_input()
2254 	if (!pchb)  in ppp_channel_bridge_input()
2257 	spin_lock(&pchb->downl);  in ppp_channel_bridge_input()
2258 	if (!pchb->chan) {  in ppp_channel_bridge_input()
2264 	skb_scrub_packet(skb, !net_eq(pch->chan_net, pchb->chan_net));  in ppp_channel_bridge_input()
2265 	if (!pchb->chan->ops->start_xmit(pchb->chan, skb))  in ppp_channel_bridge_input()
2269 	spin_unlock(&pchb->downl);  in ppp_channel_bridge_input()
2274 	return !!pchb;  in ppp_channel_bridge_input()