1 files changed, 11 insertions, 13 deletions

diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 730c4e68094b..4142c85e77d8 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -319,9 +319,7 @@ static int qdio_siga_output(struct qdio_q *q, unsigned int *busy_bit,
 	int retries = 0, cc;
 	unsigned long laob = 0;
 
-	WARN_ON_ONCE(aob && ((queue_type(q) != QDIO_IQDIO_QFMT) ||
-			     !q->u.out.use_cq));
-	if (q->u.out.use_cq && aob != 0) {
+	if (aob) {
 		fc = QDIO_SIGA_WRITEQ;
 		laob = aob;
 	}
@@ -621,9 +619,6 @@ static inline unsigned long qdio_aob_for_buffer(struct qdio_output_q *q,
 {
 	unsigned long phys_aob = 0;
 
-	if (!q->use_cq)
-		return 0;
-
 	if (!q->aobs[bufnr]) {
 		struct qaob *aob = qdio_allocate_aob();
 		q->aobs[bufnr] = aob;
@@ -1308,6 +1303,8 @@ static void qdio_detect_hsicq(struct qdio_irq *irq_ptr)
 
 	for_each_output_queue(irq_ptr, q, i) {
 		if (use_cq) {
+			if (multicast_outbound(q))
+				continue;
 			if (qdio_enable_async_operation(&q->u.out) < 0) {
 				use_cq = 0;
 				continue;
@@ -1553,18 +1550,19 @@ static int handle_outbound(struct qdio_q *q, unsigned int callflags,
 		/* One SIGA-W per buffer required for unicast HSI */
 		WARN_ON_ONCE(count > 1 && !multicast_outbound(q));
 
-		phys_aob = qdio_aob_for_buffer(&q->u.out, bufnr);
+		if (q->u.out.use_cq)
+			phys_aob = qdio_aob_for_buffer(&q->u.out, bufnr);
 
 		rc = qdio_kick_outbound_q(q, phys_aob);
 	} else if (need_siga_sync(q)) {
 		rc = qdio_siga_sync_q(q);
+	} else if (count < QDIO_MAX_BUFFERS_PER_Q &&
+		   get_buf_state(q, prev_buf(bufnr), &state, 0) > 0 &&
+		   state == SLSB_CU_OUTPUT_PRIMED) {
+		/* The previous buffer is not processed yet, tack on. */
+		qperf_inc(q, fast_requeue);
 	} else {
-		/* try to fast requeue buffers */
-		get_buf_state(q, prev_buf(bufnr), &state, 0);
-		if (state != SLSB_CU_OUTPUT_PRIMED)
-			rc = qdio_kick_outbound_q(q, 0);
-		else
-			qperf_inc(q, fast_requeue);
+		rc = qdio_kick_outbound_q(q, 0);
 	}
 
 	/* in case of SIGA errors we must process the error immediately */