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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2012-07-11 21:22:16 +0000 |
|---|---|---|
| committer | James Bottomley <JBottomley@Parallels.com> | 2012-07-20 08:59:03 +0100 |
| commit | 59057fbc37178f10a196ab7ec170b80273f75a47 (patch) | |
| tree | 79b85034672f27cf605d90736c8f1a75ac2c0656 /drivers/scsi | |
| parent | 0b1017aab197271a78169fde3d7e487bb721997c (diff) | |
| download | lwn-59057fbc37178f10a196ab7ec170b80273f75a47.tar.gz lwn-59057fbc37178f10a196ab7ec170b80273f75a47.zip | |
[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.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index ae3bef7c523f..c7030fbee79c 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, |