s390/qdio: refactor ACK processing for primed SBALs
inbound_primed() currently has two code paths - one for QEBSM that knows how to deal with multiple ACKs, and a non-QEBSM path that strictly assumes a single ACK on the queue. In preparation for a subsequent patch, slightly adjust the non-QEBSM path so that it can manage a queue with multiple ACKs. Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
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@ -466,15 +466,14 @@ static inline void inbound_primed(struct qdio_q *q, unsigned int start,
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* or by the next inbound run.
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*/
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new = add_buf(start, count - 1);
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if (q->u.in.ack_count) {
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/* reset the previous ACK but first set the new one */
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set_buf_state(q, new, SLSB_P_INPUT_ACK);
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set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT);
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} else {
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q->u.in.ack_count = 1;
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set_buf_state(q, new, SLSB_P_INPUT_ACK);
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}
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set_buf_state(q, new, SLSB_P_INPUT_ACK);
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/* delete the previous ACKs */
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if (q->u.in.ack_count)
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set_buf_states(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT,
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q->u.in.ack_count);
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q->u.in.ack_count = 1;
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q->u.in.ack_start = new;
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count--;
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if (!count)
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