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authorJan Glauber <jang@linux.vnet.ibm.com>2009-06-22 12:08:12 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-06-22 12:08:20 +0200
commit36e3e72120e27939233e4bd88a8d74b3a2377428 (patch)
treeb9630dd367096651a23f5425f70f2c28ec886970 /drivers/s390
parent9a2c160a8cbd5b3253672b3bac462c64d0d2eef7 (diff)
downloadblackbird-op-linux-36e3e72120e27939233e4bd88a8d74b3a2377428.tar.gz
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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>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/cio/qdio_main.c34
1 files changed, 6 insertions, 28 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 127e78eef651..779b7741d495 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -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 */
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