From c0d956de747863e6a7710c912198e57be0601af2 Mon Sep 17 00:00:00 2001
From: krw <krw@openbsd.org>
Date: Fri, 10 Jul 2020 19:43:09 +0000
Subject: Shuffle a bit of code to stop using sc->sc_link to hold values for
 openings outside of the one used at config_found() time. Adapters should take
 care of their own data.

ok dlg@ for a sligthly different vioblk.c version.
---
 sys/dev/pv/vioblk.c  | 10 ++++++----
 sys/dev/pv/vioscsi.c | 10 +++++-----
 2 files changed, 11 insertions(+), 9 deletions(-)

diff --git a/sys/dev/pv/vioblk.c b/sys/dev/pv/vioblk.c
index 670b8fc0197..8e47821ba99 100644
--- a/sys/dev/pv/vioblk.c
+++ b/sys/dev/pv/vioblk.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: vioblk.c,v 1.20 2020/06/27 14:29:45 krw Exp $	*/
+/*	$OpenBSD: vioblk.c,v 1.21 2020/07/10 19:43:09 krw Exp $	*/
 
 /*
  * Copyright (c) 2012 Stefan Fritsch.
@@ -107,6 +107,7 @@ struct vioblk_softc {
 	struct virtqueue         sc_vq[1];
 	struct virtio_blk_req   *sc_reqs;
 	bus_dma_segment_t        sc_reqs_segs[1];
+	int			 sc_nreqs;
 
 	struct scsi_link	 sc_link;
 	struct scsi_iopool	 sc_iopool;
@@ -229,12 +230,13 @@ vioblk_attach(struct device *parent, struct device *self, void *aux)
 	mtx_init(&sc->sc_vr_mtx, IPL_BIO);
 	scsi_iopool_init(&sc->sc_iopool, sc, vioblk_req_get, vioblk_req_put);
 
-	sc->sc_link.openings = vioblk_alloc_reqs(sc, qsize);
-	if (sc->sc_link.openings == 0) {
+	sc->sc_nreqs = vioblk_alloc_reqs(sc, qsize);
+	if (sc->sc_nreqs == 0) {
 		printf("\nCan't alloc reqs\n");
 		goto err;
 	}
 
+	sc->sc_link.openings = sc->sc_nreqs;
 	sc->sc_link.adapter = &vioblk_switch;
 	sc->sc_link.pool = &sc->sc_iopool;
 	sc->sc_link.adapter_softc = self;
@@ -373,7 +375,7 @@ vioblk_reset(struct vioblk_softc *sc)
 	vioblk_vq_done(&sc->sc_vq[0]);
 
 	/* abort all remaining requests */
-	for (i = 0; i < sc->sc_link.openings; i++) {
+	for (i = 0; i < sc->sc_nreqs; i++) {
 		struct virtio_blk_req *vr = &sc->sc_reqs[i];
 		struct scsi_xfer *xs = vr->vr_xs;
 
diff --git a/sys/dev/pv/vioscsi.c b/sys/dev/pv/vioscsi.c
index 94b18b74e5d..76a027e5172 100644
--- a/sys/dev/pv/vioscsi.c
+++ b/sys/dev/pv/vioscsi.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: vioscsi.c,v 1.19 2020/06/27 17:28:58 krw Exp $	*/
+/*	$OpenBSD: vioscsi.c,v 1.20 2020/07/10 19:43:09 krw Exp $	*/
 /*
  * Copyright (c) 2013 Google Inc.
  *
@@ -154,13 +154,13 @@ vioscsi_attach(struct device *parent, struct device *self, void *aux)
 	mtx_init(&sc->sc_vr_mtx, IPL_BIO);
 	scsi_iopool_init(&sc->sc_iopool, sc, vioscsi_req_get, vioscsi_req_put);
 
-	sc->sc_link.openings = vioscsi_alloc_reqs(sc, vsc, qsize);
-	if (sc->sc_link.openings == 0) {
+	int nreqs = vioscsi_alloc_reqs(sc, vsc, qsize);
+	if (nreqs == 0) {
 		printf("\nCan't alloc reqs\n");
 		goto err;
-	} else if (sc->sc_link.openings > cmd_per_lun)
-		sc->sc_link.openings = cmd_per_lun;
+	}
 
+	sc->sc_link.openings = (nreqs > cmd_per_lun) ? cmd_per_lun : nreqs;
 	sc->sc_link.adapter = &vioscsi_switch;
 	sc->sc_link.adapter_softc = sc;
 	sc->sc_link.adapter_target = SDEV_NO_ADAPTER_TARGET;
-- 
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