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[S390] qdio: extract all primed SBALs at once 

For devices without QIOASSIST primed SBALS were extracted in a loop.
Remove the loop since get_buf_states can already return more than
one primed SBAL.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Jan Glauber 2009-06-22 12:08:12 +02:00 committed by Martin Schwidefsky
parent 9a2c160a8c
commit 36e3e72120
1 changed files with 6 additions and 28 deletions
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34
drivers/s390/cio/qdio_main.c
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@ -476,19 +476,13 @@ static int get_inbound_buffer_frontier(struct qdio_q *q)
count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK);
stop = add_buf(q->first_to_check, count);
/*
* No siga sync here, as a PCI or we after a thin interrupt
* will sync the queues.
*/
/* need to set count to 1 for non-qebsm */
if (!is_qebsm(q))
count = 1;
check_next:
if (q->first_to_check == stop)
goto out;
/*
* No siga sync here, as a PCI or we after a thin interrupt
* already sync'ed the queues.
*/
count = get_buf_states(q, q->first_to_check, &state, count, 1);
if (!count)
goto out;
@ -496,14 +490,9 @@ check_next:
switch (state) {
case SLSB_P_INPUT_PRIMED:
inbound_primed(q, count);
/*
* No siga-sync needed for non-qebsm here, as the inbound queue
* will be synced on the next siga-r, resp.
* qdio_inbound_q_done will do the siga-sync.
*/
q->first_to_check = add_buf(q->first_to_check, count);
atomic_sub(count, &q->nr_buf_used);
goto check_next;
break;
case SLSB_P_INPUT_ERROR:
announce_buffer_error(q, count);
/* process the buffer, the upper layer will take care of it */
@ -641,11 +630,6 @@ static int get_outbound_buffer_frontier(struct qdio_q *q)
count = min(atomic_read(&q->nr_buf_used), QDIO_MAX_BUFFERS_MASK);
stop = add_buf(q->first_to_check, count);
/* need to set count to 1 for non-qebsm */
if (!is_qebsm(q))
count = 1;
check_next:
if (q->first_to_check == stop)
return q->first_to_check;
@ -660,13 +644,7 @@ check_next:
atomic_sub(count, &q->nr_buf_used);
q->first_to_check = add_buf(q->first_to_check, count);
/*
* We fetch all buffer states at once. get_buf_states may
* return count < stop. For QEBSM we do not loop.
*/
if (is_qebsm(q))
break;
goto check_next;
break;
case SLSB_P_OUTPUT_ERROR:
announce_buffer_error(q, count);
/* process the buffer, the upper layer will take care of it */