| Date | Mon, 13 Oct 2014 10:50:43 +0300 | From | "Michael S. Tsirkin" <> | Subject | [PATCH v4 12/25] virtio_blk: enable VQs early |
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virtio spec requires drivers to set DRIVER_OK before using VQs. This is set automatically after probe returns, virtio block violated this rule by calling add_disk, which causes the VQ to be used directly within probe.
To fix, call virtio_device_ready before using VQs.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> --- drivers/block/virtio_blk.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c index 89ba8d6..46b04bf 100644 --- a/drivers/block/virtio_blk.c +++ b/drivers/block/virtio_blk.c @@ -719,6 +719,8 @@ static int virtblk_probe(struct virtio_device *vdev) if (!err && opt_io_size) blk_queue_io_opt(q, blk_size * opt_io_size); + virtio_device_ready(vdev); + add_disk(vblk->disk); err = device_create_file(disk_to_dev(vblk->disk), &dev_attr_serial); if (err) -- MST
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