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authorNicholas Bellinger <nab@linux-iscsi.org>2012-07-11 21:22:16 +0000
committerJames Bottomley <JBottomley@Parallels.com>2012-07-20 08:59:03 +0100
commit59057fbc37178f10a196ab7ec170b80273f75a47 (patch)
tree79b85034672f27cf605d90736c8f1a75ac2c0656 /drivers/scsi
parent0b1017aab197271a78169fde3d7e487bb721997c (diff)
[SCSI] virtio-scsi: Add vdrv->scan for post VIRTIO_CONFIG_S_DRIVER_OK LUN scanning
This patch changes virtio-scsi to use a new virtio_driver->scan() callback so that scsi_scan_host() can be properly invoked once virtio_dev_probe() has set add_status(dev, VIRTIO_CONFIG_S_DRIVER_OK) to signal active virtio-ring operation, instead of from within virtscsi_probe(). This fixes a bug where SCSI LUN scanning for both virtio-scsi-raw and virtio-scsi/tcm_vhost setups was happening before VIRTIO_CONFIG_S_DRIVER_OK had been set, causing VIRTIO_SCSI_S_BAD_TARGET to occur. This fixes a bug with virtio-scsi/tcm_vhost where LUN scan was not detecting LUNs. Tested with virtio-scsi-raw + virtio-scsi/tcm_vhost w/ IBLOCK on 3.5-rc2 code. Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/virtio_scsi.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index ae3bef7c523..c7030fbee79 100644
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -571,6 +571,13 @@ static struct virtio_scsi_target_state *virtscsi_alloc_tgt(
return tgt;
}
+static void virtscsi_scan(struct virtio_device *vdev)
+{
+ struct Scsi_Host *shost = (struct Scsi_Host *)vdev->priv;
+
+ scsi_scan_host(shost);
+}
+
static void virtscsi_remove_vqs(struct virtio_device *vdev)
{
struct Scsi_Host *sh = virtio_scsi_host(vdev);
@@ -677,9 +684,10 @@ static int __devinit virtscsi_probe(struct virtio_device *vdev)
err = scsi_add_host(shost, &vdev->dev);
if (err)
goto scsi_add_host_failed;
-
- scsi_scan_host(shost);
-
+ /*
+ * scsi_scan_host() happens in virtscsi_scan() via virtio_driver->scan()
+ * after VIRTIO_CONFIG_S_DRIVER_OK has been set..
+ */
return 0;
scsi_add_host_failed:
@@ -735,6 +743,7 @@ static struct virtio_driver virtio_scsi_driver = {
.driver.owner = THIS_MODULE,
.id_table = id_table,
.probe = virtscsi_probe,
+ .scan = virtscsi_scan,
#ifdef CONFIG_PM
.freeze = virtscsi_freeze,
.restore = virtscsi_restore,