Re: [PATCH v2 2/2] hw/nvme: cleanup error reporting in nvme_init_pci()

[Markus Armbruster]

Klaus Jensen <its@irrelevant.dk> writes:

> From: Klaus Jensen <k.jensen@samsung.com>
>
> Replace the local Error variable with errp and ERRP_GUARD() and change
> the return value to bool.
>
> Reviewed-by: Markus Armbruster <armbru@redhat.com>
> Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
> ---
>  hw/nvme/ctrl.c | 23 ++++++++++-------------
>  1 file changed, 10 insertions(+), 13 deletions(-)
>
> diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c
> index a5c0a5fa6ce2..e23af4db91ae 100644
> --- a/hw/nvme/ctrl.c
> +++ b/hw/nvme/ctrl.c
> @@ -7343,15 +7343,14 @@ static int nvme_add_pm_capability(PCIDevice *pci_dev, 
> uint8_t offset)
>      return 0;
>  }
>  
> -static int nvme_init_pci(NvmeCtrl *n, PCIDevice *pci_dev, Error **errp)
> +static bool nvme_init_pci(NvmeCtrl *n, PCIDevice *pci_dev, Error **errp)
>  {
> +    ERRP_GUARD();
>      uint8_t *pci_conf = pci_dev->config;
>      uint64_t bar_size;
>      unsigned msix_table_offset, msix_pba_offset;
>      int ret;
>  
> -    Error *err = NULL;
> -
>      pci_conf[PCI_INTERRUPT_PIN] = 1;
>      pci_config_set_prog_interface(pci_conf, 0x2);
>  
> @@ -7388,14 +7387,12 @@ static int nvme_init_pci(NvmeCtrl *n, PCIDevice 
> *pci_dev, Error **errp)
>      }
>      ret = msix_init(pci_dev, n->params.msix_qsize,
>                      &n->bar0, 0, msix_table_offset,
> -                    &n->bar0, 0, msix_pba_offset, 0, &err);
> -    if (ret < 0) {
> -        if (ret == -ENOTSUP) {
> -            warn_report_err(err);
> -        } else {
> -            error_propagate(errp, err);
> -            return ret;
> -        }
> +                    &n->bar0, 0, msix_pba_offset, 0, errp);
> +    if (ret == -ENOTSUP) {
> +        warn_report_err(*errp);
> +        *errp = NULL;
> +    } else {

Uh, shouldn't this be

       } else if (ret < 0) {

?

> +        return false;
>      }
>  
>      nvme_update_msixcap_ts(pci_dev, n->conf_msix_qsize);
> @@ -7412,7 +7409,7 @@ static int nvme_init_pci(NvmeCtrl *n, PCIDevice 
> *pci_dev, Error **errp)
>          nvme_init_sriov(n, pci_dev, 0x120);
>      }
>  
> -    return 0;
> +    return true;
>  }
>  
>  static void nvme_init_subnqn(NvmeCtrl *n)
> @@ -7588,7 +7585,7 @@ static void nvme_realize(PCIDevice *pci_dev, Error 
> **errp)
>          return;
>      }
>      nvme_init_state(n);
> -    if (nvme_init_pci(n, pci_dev, errp)) {
> +    if (!nvme_init_pci(n, pci_dev, errp)) {
>          return;
>      }
>      nvme_init_ctrl(n, pci_dev);