__next_seq
chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq);
chan->next_tx_seq = __next_seq(chan, chan->next_tx_seq);
seq = __next_seq(chan, seq)) {
chan->expected_tx_seq = __next_seq(chan, txseq);
ackseq = __next_seq(chan, ackseq)) {
chan->buffer_seq = __next_seq(chan, chan->buffer_seq);
chan->expected_tx_seq = __next_seq(chan,
chan->expected_tx_seq = __next_seq(chan, txseq);
__next_seq(chan, chan->buffer_seq));
chan->buffer_seq = __next_seq(chan, chan->buffer_seq);
chan->expected_tx_seq = __next_seq(chan, txseq);