Re: [Qemu-devel] [PULL 09/21] pci: Convert to realize

[Eduardo Habkost <ehabkost@redhat.com>]

On Mon, Jul 03, 2017 at 10:45:16PM +0300, Michael S. Tsirkin wrote:
> From: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
> 
> Convert i82801b11, io3130_upstream, io3130_downstream and
> pcie_root_port devices to realize.
> 
> Cc: mst@redhat.com
> Cc: marcel@redhat.com
> Cc: armbru@redhat.com
> Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> ---
[...]
> diff --git a/hw/pci-bridge/xio3130_downstream.c b/hw/pci-bridge/xio3130_downstream.c
> index cfe8a36..e706f36 100644
> --- a/hw/pci-bridge/xio3130_downstream.c
> +++ b/hw/pci-bridge/xio3130_downstream.c
> @@ -56,33 +56,33 @@ static void xio3130_downstream_reset(DeviceState *qdev)
>      pci_bridge_reset(qdev);
>  }
>  
> -static int xio3130_downstream_initfn(PCIDevice *d)
> +static void xio3130_downstream_realize(PCIDevice *d, Error **errp)
>  {
[...]
>      pcie_chassis_create(s->chassis);
>      rc = pcie_chassis_add_slot(s);
>      if (rc < 0) {
>          goto err_pcie_cap;

Missing error_setg() call here.  If pcie_chassis_add_slot() fails, realize
won't report an error properly.  Causes crash with:

$ ./x86_64-softmmu/qemu-system-x86_64 -device ioh3420 -device xio3130-downstream
qemu-system-x86_64: /home/ehabkost/rh/proj/virt/qemu/memory.c:2166: memory_region_del_subregion: Assertion `subregion->container == mr' failed.
Aborted (core dumped)


>      }
>  
>      rc = pcie_aer_init(d, PCI_ERR_VER, XIO3130_AER_OFFSET,
> -                       PCI_ERR_SIZEOF, &err);
> +                       PCI_ERR_SIZEOF, errp);
>      if (rc < 0) {
> -        error_report_err(err);
>          goto err;
>      }
>  
> -    return 0;
> +    return;
>  
>  err:
>      pcie_chassis_del_slot(s);
> @@ -114,7 +113,6 @@ err_msi:
>      msi_uninit(d);
>  err_bridge:
>      pci_bridge_exitfn(d);
> -    return rc;
>  }
>  
[...]

-- 
Eduardo