From: Klaus Jensen <k.jensen@samsung.com>

If the user does not specify an nsid parameter on the nvme-ns device,
nvme_register_namespace will find the first free namespace id and assign
that.

This fix makes sure the assigned id is saved.

Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
---
 hw/block/nvme.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index da8344f196a8..bb1ee009cd31 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -2583,7 +2583,7 @@ int nvme_register_namespace(NvmeCtrl *n, NvmeNamespace *ns, Error **errp)
         for (int i = 1; i <= n->num_namespaces; i++) {
             NvmeNamespace *ns = nvme_ns(n, i);
             if (!ns) {
-                nsid = i;
+                nsid = ns->params.nsid = i;
                 break;
             }
         }
-- 
2.28.0

> -----Original Message-----
> From: Qemu-devel <qemu-devel-
> bounces+dmitry.fomichev=wdc.com@nongnu.org> On Behalf Of Klaus
> Jensen
> Sent: Thursday, October 1, 2020 5:51 PM
> To: qemu-devel@nongnu.org
> Cc: Kevin Wolf <kwolf@redhat.com>; qemu-block@nongnu.org; Klaus Jensen
> <k.jensen@samsung.com>; Max Reitz <mreitz@redhat.com>; Klaus Jensen
> <its@irrelevant.dk>; Keith Busch <kbusch@kernel.org>
> Subject: [PATCH] hw/block/nvme: update nsid when registered
> 
> From: Klaus Jensen <k.jensen@samsung.com>
> 
> If the user does not specify an nsid parameter on the nvme-ns device,
> nvme_register_namespace will find the first free namespace id and assign
> that.
> 
> This fix makes sure the assigned id is saved.
> 
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>

Yep, this makes autogenerated NSIDs work.
Reviewed-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>

> ---
>  hw/block/nvme.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index da8344f196a8..bb1ee009cd31 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -2583,7 +2583,7 @@ int nvme_register_namespace(NvmeCtrl *n,
> NvmeNamespace *ns, Error **errp)
>          for (int i = 1; i <= n->num_namespaces; i++) {
>              NvmeNamespace *ns = nvme_ns(n, i);
>              if (!ns) {
> -                nsid = i;
> +                nsid = ns->params.nsid = i;
>                  break;
>              }
>          }
> --
> 2.28.0
> 

On Oct  1 23:50, Klaus Jensen wrote:
> From: Klaus Jensen <k.jensen@samsung.com>
> 
> If the user does not specify an nsid parameter on the nvme-ns device,
> nvme_register_namespace will find the first free namespace id and assign
> that.
> 
> This fix makes sure the assigned id is saved.
> 
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> ---
>  hw/block/nvme.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/block/nvme.c b/hw/block/nvme.c
> index da8344f196a8..bb1ee009cd31 100644
> --- a/hw/block/nvme.c
> +++ b/hw/block/nvme.c
> @@ -2583,7 +2583,7 @@ int nvme_register_namespace(NvmeCtrl *n, NvmeNamespace *ns, Error **errp)
>          for (int i = 1; i <= n->num_namespaces; i++) {
>              NvmeNamespace *ns = nvme_ns(n, i);
>              if (!ns) {
> -                nsid = i;
> +                nsid = ns->params.nsid = i;
>                  break;
>              }
>          }
> -- 
> 2.28.0
> 
> 

Applied to nvme-next.