Re: [Qemu-devel] [PATCH qom-next v3 12/15] nvme: Permit zero-length block devices

[Keith Busch]

On Wed, 12 Mar 2014, Andreas Färber wrote:
> It may not be sensible for normal use cases, but it allows to use
> /dev/null in QTest.

Thanks! Sounds useful despite not being usable as storage. :)

I applied to my nvme tree here:

http://git.infradead.org/users/kbusch/qemu-nvme.git

It's quite a bit ahead of the upstream on 'nvme features'. I often hear
from people in various orgs using this, so might be time I roll it into
a pull request.

> Signed-off-by: Andreas Färber <address@hidden>
> ---
> hw/block/nvme.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index 2882ffe..5fd8f89 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -752,8 +752,8 @@ static int nvme_init(PCIDevice *pci_dev)
>         return -1;
>     }
>
> -    bs_size =  bdrv_getlength(n->conf.bs);
> -    if (bs_size <= 0) {
> +    bs_size = bdrv_getlength(n->conf.bs);
> +    if (bs_size < 0) {
>         return -1;
>     }
>
> --
> 1.8.4.5