[S390] qdio: merge inbound and outbound handler functions

The inbound and outbound handlers are nearly identical if the outbound
handler uses first_to_check as end index instead of last_move. Since both
values are identical at that point the handlers can be merged.

Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

3 files changed, 21 insertions, 45 deletions

diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h
index 41171d741f3..13bcb811438 100644
--- a/drivers/s390/cio/qdio.h
+++ b/drivers/s390/cio/qdio.h
@@ -356,7 +356,7 @@ int get_buf_state(struct qdio_q *q, unsigned int bufnr, unsigned char *state,
                   int auto_ack);
 void qdio_check_outbound_after_thinint(struct qdio_q *q);
 int qdio_inbound_q_moved(struct qdio_q *q);
-void qdio_kick_inbound_handler(struct qdio_q *q);
+void qdio_kick_handler(struct qdio_q *q);
 void qdio_stop_polling(struct qdio_q *q);
 int qdio_siga_sync_q(struct qdio_q *q);
 
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index e53ac67e1e4..9e8a2914259 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -570,29 +570,30 @@ static int qdio_inbound_q_done(struct qdio_q *q)
         }
 }
 
-void qdio_kick_inbound_handler(struct qdio_q *q)
+void qdio_kick_handler(struct qdio_q *q)
 {
-        int count, start, end;
-
-        qdio_perf_stat_inc(&perf_stats.inbound_handler);
-
-        start = q->first_to_kick;
-        end = q->first_to_check;
-        if (end >= start)
-                count = end - start;
-        else
-                count = end + QDIO_MAX_BUFFERS_PER_Q - start;
-
-        DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "kih s:%3d c:%3d", start, count);
+        int start = q->first_to_kick;
+        int end = q->first_to_check;
+        int count;
 
         if (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE))
                 return;
 
-        q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr,
-                   start, count, q->irq_ptr->int_parm);
+        count = sub_buf(end, start);
+
+        if (q->is_input_q) {
+                qdio_perf_stat_inc(&perf_stats.inbound_handler);
+                DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "kih s:%3d c:%3d", start, count);
+        } else {
+                DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "koh: nr:%1d", q->nr);
+                DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "s:%3d c:%3d", start, count);
+        }
+
+        q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr, start, count,
+                   q->irq_ptr->int_parm);
 
         /* for the next time */
-        q->first_to_kick = q->first_to_check;
+        q->first_to_kick = end;
         q->qdio_error = 0;
 }
 
@@ -603,7 +604,7 @@ again:
         if (!qdio_inbound_q_moved(q))
                 return;
 
-        qdio_kick_inbound_handler(q);
+        qdio_kick_handler(q);
 
         if (!qdio_inbound_q_done(q))
                 /* means poll time is not yet over */
@@ -736,38 +737,13 @@ static int qdio_kick_outbound_q(struct qdio_q *q)
         return cc;
 }
 
-static void qdio_kick_outbound_handler(struct qdio_q *q)
-{
-        int start, end, count;
-
-        start = q->first_to_kick;
-        end = q->last_move;
-        if (end >= start)
-                count = end - start;
-        else
-                count = end + QDIO_MAX_BUFFERS_PER_Q - start;
-
-        DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "kickouth: %1d", q->nr);
-        DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "s:%3d c:%3d", start, count);
-
-        if (unlikely(q->irq_ptr->state != QDIO_IRQ_STATE_ACTIVE))
-                return;
-
-        q->handler(q->irq_ptr->cdev, q->qdio_error, q->nr, start, count,
-                   q->irq_ptr->int_parm);
-
-        /* for the next time: */
-        q->first_to_kick = q->last_move;
-        q->qdio_error = 0;
-}
-
 static void __qdio_outbound_processing(struct qdio_q *q)
 {
         qdio_perf_stat_inc(&perf_stats.tasklet_outbound);
         BUG_ON(atomic_read(&q->nr_buf_used) < 0);
 
         if (qdio_outbound_q_moved(q))
-                qdio_kick_outbound_handler(q);
+                qdio_kick_handler(q);
 
         if (queue_type(q) == QDIO_ZFCP_QFMT)
                 if (!pci_out_supported(q) && !qdio_outbound_q_done(q))
diff --git a/drivers/s390/cio/qdio_thinint.c b/drivers/s390/cio/qdio_thinint.c
index 96f0095f568..c655d011a78 100644
--- a/drivers/s390/cio/qdio_thinint.c
+++ b/drivers/s390/cio/qdio_thinint.c
@@ -161,7 +161,7 @@ static void __tiqdio_inbound_processing(struct qdio_q *q)
         if (!qdio_inbound_q_moved(q))
                 return;
 
-        qdio_kick_inbound_handler(q);
+        qdio_kick_handler(q);
 
         if (!tiqdio_inbound_q_done(q)) {
                 qdio_perf_stat_inc(&perf_stats.thinint_inbound_loop);