l2cap_chan_hold_unless_zero
struct l2cap_chan *l2cap_chan_hold_unless_zero(struct l2cap_chan *c);
c = l2cap_chan_hold_unless_zero(c);
c = l2cap_chan_hold_unless_zero(c);
if (!l2cap_chan_hold_unless_zero(c))
c1 = l2cap_chan_hold_unless_zero(c1);
chan = l2cap_chan_hold_unless_zero(chan);
chan = l2cap_chan_hold_unless_zero(chan);
c = l2cap_chan_hold_unless_zero(c);
chan = l2cap_chan_hold_unless_zero(l2cap_pi(sk)->chan);