[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>

1 files changed, 6 insertions, 28 deletions

diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 127e78eef65..779b7741d49 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 */