linux-kernel - [PATCH v3 24/25] virtio

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Date:	Sun, 12 Oct 2014 14:48:33 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Rusty Russell <rusty@...tcorp.com.au>,
	virtualization@...ts.linux-foundation.org,
	linux-scsi@...r.kernel.org, linux-s390@...r.kernel.org,
	v9fs-developer@...ts.sourceforge.net, netdev@...r.kernel.org,
	kvm@...r.kernel.org, Amit Shah <amit.shah@...hat.com>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>,
	Paolo Bonzini <pbonzini@...hat.com>,
	"James E.J. Bottomley" <JBottomley@...allels.com>
Subject: [PATCH v3 24/25] virtio_scsi: drop scan callback

Enable VQs early like we do for restore.
This makes it possible to drop the scan callback,
moving scanning into the probe function, and making
code simpler.

Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
---
 drivers/scsi/virtio_scsi.c | 23 +++++++----------------
 1 file changed, 7 insertions(+), 16 deletions(-)

diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index 327eba0..5f022ff 100644
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -860,17 +860,6 @@ static void virtscsi_init_vq(struct virtio_scsi_vq *virtscsi_vq,
 	virtscsi_vq->vq = vq;
 }
 
-static void virtscsi_scan(struct virtio_device *vdev)
-{
-	struct Scsi_Host *shost = virtio_scsi_host(vdev);
-	struct virtio_scsi *vscsi = shost_priv(shost);
-
-	if (virtio_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG))
-		virtscsi_kick_event_all(vscsi);
-
-	scsi_scan_host(shost);
-}
-
 static void virtscsi_remove_vqs(struct virtio_device *vdev)
 {
 	struct Scsi_Host *sh = virtio_scsi_host(vdev);
@@ -1007,10 +996,13 @@ static int virtscsi_probe(struct virtio_device *vdev)
 	err = scsi_add_host(shost, &vdev->dev);
 	if (err)
 		goto scsi_add_host_failed;
-	/*
-	 * scsi_scan_host() happens in virtscsi_scan() via virtio_driver->scan()
-	 * after VIRTIO_CONFIG_S_DRIVER_OK has been set..
-	 */
+
+	virtio_enable_vqs_early(vdev);
+
+	if (virtio_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG))
+		virtscsi_kick_event_all(vscsi);
+
+	scsi_scan_host(shost);
 	return 0;
 
 scsi_add_host_failed:
@@ -1090,7 +1082,6 @@ static struct virtio_driver virtio_scsi_driver = {
 	.driver.owner = THIS_MODULE,
 	.id_table = id_table,
 	.probe = virtscsi_probe,
-	.scan = virtscsi_scan,
 #ifdef CONFIG_PM_SLEEP
 	.freeze = virtscsi_freeze,
 	.restore = virtscsi_restore,
-- 
MST

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