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authorMichael S. Tsirkin <mst@redhat.com>2014-10-15 10:22:31 +1030
committerRusty Russell <rusty@rustcorp.com.au>2014-10-15 10:25:06 +1030
commitcd679048958011418f14a8fc7dfdb64ab72ca315 (patch)
treeb51cf102430d9f6cf74e8266a54f75aae010cde4 /drivers/scsi/virtio_scsi.c
parent024655555021e971203c519770609509e0af4468 (diff)
virtio_scsi: move kick event out from virtscsi_init
We currently kick event within virtscsi_init, before host is fully initialized. This can in theory confuse guest if device consumes the buffers immediately. To fix, move virtscsi_kick_event_all out to scan/restore. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'drivers/scsi/virtio_scsi.c')
-rw-r--r--drivers/scsi/virtio_scsi.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index eee1bc0b506e..0642ce387c75 100644
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -853,7 +853,11 @@ static void virtscsi_init_vq(struct virtio_scsi_vq *virtscsi_vq,
static void virtscsi_scan(struct virtio_device *vdev)
{
- struct Scsi_Host *shost = (struct Scsi_Host *)vdev->priv;
+ 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);
}
@@ -916,9 +920,6 @@ static int virtscsi_init(struct virtio_device *vdev,
virtscsi_config_set(vdev, cdb_size, VIRTIO_SCSI_CDB_SIZE);
virtscsi_config_set(vdev, sense_size, VIRTIO_SCSI_SENSE_SIZE);
- if (virtio_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG))
- virtscsi_kick_event_all(vscsi);
-
err = 0;
out:
@@ -1048,8 +1049,13 @@ static int virtscsi_restore(struct virtio_device *vdev)
return err;
err = register_hotcpu_notifier(&vscsi->nb);
- if (err)
+ if (err) {
vdev->config->del_vqs(vdev);
+ return err;
+ }
+
+ if (virtio_has_feature(vdev, VIRTIO_SCSI_F_HOTPLUG))
+ virtscsi_kick_event_all(vscsi);
return err;
}