Re: [PATCH v2 1/2] hw/nvme: fix incorrect use of errp/local_err

[Markus Armbruster <armbru@redhat.com>]

Klaus Jensen <its@irrelevant.dk> writes:

> From: Klaus Jensen <k.jensen@samsung.com>
>
> Make nvme_check_constraints() return a bool and fix an invalid error
> propagation where the actual error is thrown away in favor of an unused
> local Error value.

Is it?  I think you're talking about ...

> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> ---
>  hw/nvme/ctrl.c | 48 +++++++++++++++++++++++-------------------------
>  1 file changed, 23 insertions(+), 25 deletions(-)
>
> diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
> index ac3885ce5079..a5c0a5fa6ce2 100644
> --- a/hw/nvme/ctrl.c
> +++ b/hw/nvme/ctrl.c

[...]

> @@ -7564,7 +7566,6 @@ static void nvme_realize(PCIDevice *pci_dev, Error **errp)
>  {
>      NvmeCtrl *n = NVME(pci_dev);
>      NvmeNamespace *ns;
> -    Error *local_err = NULL;
>      NvmeCtrl *pn = NVME(pcie_sriov_get_pf(pci_dev));
>  
>      if (pci_is_vf(pci_dev)) {
> @@ -7576,9 +7577,7 @@ static void nvme_realize(PCIDevice *pci_dev, Error **errp)
>          n->subsys = pn->subsys;
>      }
>  
> -    nvme_check_constraints(n, &local_err);
> -    if (local_err) {
> -        error_propagate(errp, local_err);
> +    if (!nvme_check_params(n, errp)) {
>          return;
>      }
>  
> @@ -7586,7 +7585,6 @@ static void nvme_realize(PCIDevice *pci_dev, Error **errp)
>                &pci_dev->qdev, n->parent_obj.qdev.id);
>  
>      if (nvme_init_subsys(n, errp)) {
> -        error_propagate(errp, local_err);

... this one.  error_propagate() does nothing here, because @local_err
is still null.

>          return;
>      }
>      nvme_init_state(n);