diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index 05d0b16bd7d6..869694217450 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -75,7 +75,6 @@ static void qeth_notify_skbs(struct qeth_qdio_out_q *queue,
 		enum iucv_tx_notify notification);
 static void qeth_tx_complete_buf(struct qeth_qdio_out_buffer *buf, bool error,
 				 int budget);
-static int qeth_init_qdio_out_buf(struct qeth_qdio_out_q *, int);
 
 static void qeth_close_dev_handler(struct work_struct *work)
 {
@@ -517,18 +516,6 @@ static void qeth_qdio_handle_aob(struct qeth_card *card,
 	buffer = (struct qeth_qdio_out_buffer *) aob->user1;
 	QETH_CARD_TEXT_(card, 5, "%lx", aob->user1);
 
-	/* Free dangling allocations. The attached skbs are handled by
-	 * qeth_cleanup_handled_pending().
-	 */
-	for (i = 0;
-	     i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
-	     i++) {
-		void *data = phys_to_virt(aob->sba[i]);
-
-		if (data && buffer->is_header[i])
-			kmem_cache_free(qeth_core_header_cache, data);
-	}
-
 	if (aob->aorc) {
 		QETH_CARD_TEXT_(card, 2, "aorc%02X", aob->aorc);
 		new_state = QETH_QDIO_BUF_QAOB_ERROR;
@@ -536,10 +523,9 @@ static void qeth_qdio_handle_aob(struct qeth_card *card,
 
 	switch (atomic_xchg(&buffer->state, new_state)) {
 	case QETH_QDIO_BUF_PRIMED:
-		/* Faster than TX completion code. */
-		notification = qeth_compute_cq_notification(aob->aorc, 0);
-		qeth_notify_skbs(buffer->q, buffer, notification);
-		atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
+		/* Faster than TX completion code, let it handle the async
+		 * completion for us.
+		 */
 		break;
 	case QETH_QDIO_BUF_PENDING:
 		/* TX completion code is active and will handle the async
@@ -550,6 +536,19 @@ static void qeth_qdio_handle_aob(struct qeth_card *card,
 		/* TX completion code is already finished. */
 		notification = qeth_compute_cq_notification(aob->aorc, 1);
 		qeth_notify_skbs(buffer->q, buffer, notification);
+
+		/* Free dangling allocations. The attached skbs are handled by
+		 * qeth_cleanup_handled_pending().
+		 */
+		for (i = 0;
+		     i < aob->sb_count && i < QETH_MAX_BUFFER_ELEMENTS(card);
+		     i++) {
+			void *data = phys_to_virt(aob->sba[i]);
+
+			if (data && buffer->is_header[i])
+				kmem_cache_free(qeth_core_header_cache, data);
+		}
+
 		atomic_set(&buffer->state, QETH_QDIO_BUF_HANDLED_DELAYED);
 		break;
 	default:
@@ -6078,9 +6077,13 @@ static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
 				 QDIO_OUTBUF_STATE_FLAG_PENDING)) {
 		WARN_ON_ONCE(card->options.cq != QETH_CQ_ENABLED);
 
-		if (atomic_cmpxchg(&buffer->state, QETH_QDIO_BUF_PRIMED,
-						   QETH_QDIO_BUF_PENDING) ==
-		    QETH_QDIO_BUF_PRIMED) {
+		QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
+
+		switch (atomic_cmpxchg(&buffer->state,
+				       QETH_QDIO_BUF_PRIMED,
+				       QETH_QDIO_BUF_PENDING)) {
+		case QETH_QDIO_BUF_PRIMED:
+			/* We have initial ownership, no QAOB (yet): */
 			qeth_notify_skbs(queue, buffer, TX_NOTIFY_PENDING);
 
 			/* Handle race with qeth_qdio_handle_aob(): */
@@ -6088,39 +6091,49 @@ static void qeth_iqd_tx_complete(struct qeth_qdio_out_q *queue,
 					    QETH_QDIO_BUF_NEED_QAOB)) {
 			case QETH_QDIO_BUF_PENDING:
 				/* No concurrent QAOB notification. */
-				break;
+
+				/* Prepare the queue slot for immediate re-use: */
+				qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
+				if (qeth_init_qdio_out_buf(queue, bidx)) {
+					QETH_CARD_TEXT(card, 2, "outofbuf");
+					qeth_schedule_recovery(card);
+				}
+
+				/* Skip clearing the buffer: */
+				return;
 			case QETH_QDIO_BUF_QAOB_OK:
 				qeth_notify_skbs(queue, buffer,
 						 TX_NOTIFY_DELAYED_OK);
-				atomic_set(&buffer->state,
-					   QETH_QDIO_BUF_HANDLED_DELAYED);
+				error = false;
 				break;
 			case QETH_QDIO_BUF_QAOB_ERROR:
 				qeth_notify_skbs(queue, buffer,
 						 TX_NOTIFY_DELAYED_GENERALERROR);
-				atomic_set(&buffer->state,
-					   QETH_QDIO_BUF_HANDLED_DELAYED);
+				error = true;
 				break;
 			default:
 				WARN_ON_ONCE(1);
 			}
+
+			break;
+		case QETH_QDIO_BUF_QAOB_OK:
+			/* qeth_qdio_handle_aob() already received a QAOB: */
+			qeth_notify_skbs(queue, buffer, TX_NOTIFY_OK);
+			error = false;
+			break;
+		case QETH_QDIO_BUF_QAOB_ERROR:
+			/* qeth_qdio_handle_aob() already received a QAOB: */
+			qeth_notify_skbs(queue, buffer, TX_NOTIFY_GENERALERROR);
+			error = true;
+			break;
+		default:
+			WARN_ON_ONCE(1);
 		}
-
-		QETH_CARD_TEXT_(card, 5, "pel%u", bidx);
-
-		/* prepare the queue slot for re-use: */
-		qeth_scrub_qdio_buffer(buffer->buffer, queue->max_elements);
-		if (qeth_init_qdio_out_buf(queue, bidx)) {
-			QETH_CARD_TEXT(card, 2, "outofbuf");
-			qeth_schedule_recovery(card);
-		}
-
-		return;
-	}
-
-	if (card->options.cq == QETH_CQ_ENABLED)
+	} else if (card->options.cq == QETH_CQ_ENABLED) {
 		qeth_notify_skbs(queue, buffer,
 				 qeth_compute_cq_notification(sflags, 0));
+	}
+
 	qeth_clear_output_buffer(queue, buffer, error, budget);
 }