virtio-blk: Allow extended partitions

This will allow up to DISK_MAX_PARTS (256) partitions, with for example
GPT in the guest. Otherwise, the partition scan code will only discover
the first 15 partitions.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index ea2c17c..e93899c 100644 (file)
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -656,6 +656,7 @@ static int virtblk_probe(struct virtio_device *vdev)
        vblk->disk->private_data = vblk;
        vblk->disk->fops = &virtblk_fops;
        vblk->disk->driverfs_dev = &vdev->dev;
+       vblk->disk->flags |= GENHD_FL_EXT_DEVT;
        vblk->index = index;
 
        /* configure queue flush support */