virtio-scsi needs to report LUNs greater than 256 using the "flat" format. Because the Linux SCSI layer just maps the SCSI LUN to an u32, without any parsing, these end up in the range from 16640 to 32767. Fix max_lun to account for the possibility that logical unit numbers are encoded with the "flat" format. Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> --- drivers/scsi/virtio_scsi.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index c7030fb..8b6b927 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -677,7 +677,11 @@ static int __devinit virtscsi_probe(struct virtio_device *vdev) cmd_per_lun = virtscsi_config_get(vdev, cmd_per_lun) ?: 1; shost->cmd_per_lun = min_t(u32, cmd_per_lun, shost->can_queue); shost->max_sectors = virtscsi_config_get(vdev, max_sectors) ?: 0xFFFF; - shost->max_lun = virtscsi_config_get(vdev, max_lun) + 1; + + /* LUNs > 256 are reported with format 1, so they go in the range + * 16640-32767. + */ + shost->max_lun = virtscsi_config_get(vdev, max_lun) + 1 + 0x4000; shost->max_id = num_targets; shost->max_channel = 0; shost->max_cmd_len = VIRTIO_SCSI_CDB_SIZE; -- 1.7.1 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
