Re: [Qemu-devel] [PATCH v3 2/2] hw/pci-bridge: Convert pxb initialization functions to Error

["Wei, Jiangang" <weijg.fnst@cn.fujitsu.com>]

On Wed, 2016-03-23 at 13:05 +0100, Markus Armbruster wrote:
> Wei Jiangang <weijg.fnst@cn.fujitsu.com> writes:
> 
> > Firstly, convert pxb_dev_init_common() to Error and rename
> > it to pxb_dev_realize_common().
> > Actually, pxb_register_bus() is converted as well.
> >
> > And then,
> > convert pxb_dev_initfn() and pxb_pcie_dev_initfn() to Error,
> > rename them to pxb_dev_realize() and pxb_pcie_dev_realize()
> > respectively.
> > ---
> >  hw/pci-bridge/pci_expander_bridge.c | 54 ++++++++++++++++++-------------------
> >  1 file changed, 27 insertions(+), 27 deletions(-)
> >
> > diff --git a/hw/pci-bridge/pci_expander_bridge.c b/hw/pci-bridge/pci_expander_bridge.c
> > index ba320bd..6f53a6b 100644
> > --- a/hw/pci-bridge/pci_expander_bridge.c
> > +++ b/hw/pci-bridge/pci_expander_bridge.c
> > @@ -160,30 +160,25 @@ static const TypeInfo pxb_host_info = {
> >  };
> >  
> >  /*
> > - * Registers the PXB bus as a child of the i440fx root bus.
> > - *
> > - * Returns 0 on successs, -1 if i440fx host was not
> > - * found or the bus number is already in use.
> > + * Registers the PXB bus as a child of pci host root bus.
> >   */
> > -static int pxb_register_bus(PCIDevice *dev, PCIBus *pxb_bus)
> > +static void pxb_register_bus(PCIDevice *dev, PCIBus *pxb_bus, Error **errp)
> >  {
> >      PCIBus *bus = dev->bus;
> >      int pxb_bus_num = pci_bus_num(pxb_bus);
> >  
> >      if (bus->parent_dev) {
> > -        error_report("PXB devices can be attached only to root bus.");
> > -        return -1;
> > +        error_setg(errp, "PXB devices can be attached only to root bus");
> > +        return;
> >      }
> >  
> >      QLIST_FOREACH(bus, &bus->child, sibling) {
> >          if (pci_bus_num(bus) == pxb_bus_num) {
> > -            error_report("Bus %d is already in use.", pxb_bus_num);
> > -            return -1;
> > +            error_setg(errp, "Bus %d is already in use", pxb_bus_num);
> > +            return;
> >          }
> >      }
> >      QLIST_INSERT_HEAD(&dev->bus->child, pxb_bus, sibling);
> > -
> > -    return 0;
> >  }
> >  
> >  static int pxb_map_irq_fn(PCIDevice *pci_dev, int pin)
> > @@ -213,17 +208,21 @@ static gint pxb_compare(gconstpointer a, gconstpointer b)
> >             0;
> >  }
> >  
> > -static int pxb_dev_init_common(PCIDevice *dev, bool pcie)
> > +static void pxb_dev_realize_common(PCIDevice *dev, bool pcie, Error **errp)
> >  {
> >      PXBDev *pxb = convert_to_pxb(dev);
> >      DeviceState *ds, *bds = NULL;
> >      PCIBus *bus;
> >      const char *dev_name = NULL;
> > +    Error *err = NULL;
> >  
> >      if (pxb->numa_node != NUMA_NODE_UNASSIGNED &&
> >          pxb->numa_node >= nb_numa_nodes) {
> > -        error_report("Illegal numa node %d.", pxb->numa_node);
> > -        return -EINVAL;
> > +        error_setg(&err, "Illegal numa node %d", pxb->numa_node);
> > +        if (err) {
> > +            error_propagate(errp, err);
> > +        }
> 
> No.  v2 got it right.
Thanks for your response.
OK, Let us discard v3.

> 
> > +        return;
> >      }
> >  
> >      if (dev->qdev.id && *dev->qdev.id) {
> [...]
> 
>