virtio-scsi: don't let virtio core to validate used buffer length

We never tries to use used length, so the patch prevents the virtio
core from validating used length.

Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20211027022107.14357-5-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index 07d0250f17c3a4a16a28ea5d930ac1df058bc6bf..03b09ecea42d85f493ee670183132d8a3a439ef8 100644 (file)
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -977,6 +977,7 @@ static unsigned int features[] = {
 static struct virtio_driver virtio_scsi_driver = {
        .feature_table = features,
        .feature_table_size = ARRAY_SIZE(features),
+       .suppress_used_validation = true,
        .driver.name = KBUILD_MODNAME,
        .driver.owner = THIS_MODULE,
        .id_table = id_table,