Re: [Qemu-devel] [PATCH v4 1/2] hw/pci: fixed error flow in pci_qdev_init

[Markus Armbruster <armbru@redhat.com>]

Marcel Apfelbaum <marcel.a@redhat.com> writes:

> Verify return code for pci_add_option_rom.
>
> Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
> ---
>  hw/pci/pci.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/hw/pci/pci.c b/hw/pci/pci.c
> index 6ce75aa..36226eb 100644
> --- a/hw/pci/pci.c
> +++ b/hw/pci/pci.c
> @@ -1776,7 +1776,12 @@ static int pci_qdev_init(DeviceState *qdev)
>          pci_dev->romfile = g_strdup(pc->romfile);
>          is_default_rom = true;
>      }
> -    pci_add_option_rom(pci_dev, is_default_rom);
> +
> +    rc = pci_add_option_rom(pci_dev, is_default_rom);
> +    if (rc != 0) {
> +        pci_unregister_device(DEVICE(pci_dev));
> +        return rc;
> +    }
>  
>      return 0;
>  }

Safe, because pci_add_option_rom() sets pci_dev->has_rom only on
success, and pci_unregister_device() cleans up the ROM only when
pci_has_rom is set.

Reviewed-by: Markus Armbruster <armbru@redhat.com>