On Friday 16 January 2015 09:44:08 Yijing Wang wrote:
> @@ -2066,11 +2064,11 @@ struct pci_bus *pci_scan_root_bus(struct device
> *parent, u32 db,
> {
> struct pci_host_bridge *host;
>
> - host = pci_create_host_bridge(parent, db, resources);
> + host = pci_create_host_bridge(parent, db, resources, sysdata);
> if (!host)
> return NULL;
>
> - return __pci_scan_root_bus(host, ops, sysdata);
> + return __pci_scan_root_bus(host, ops);
> }
> EXPORT_SYMBOL(pci_scan_root_bus);
>
How about keeping the sysdata out of the pci_create_host_bridge interface, and
refactoring it so that the call sequence becomes
host = pci_create_host_bridge(parent, db, resources);
host->sysdata = sysdata;
__pci_scan_root_bus(host, ops);
This way, we can make sysdata completely option. I assume that more of the
fields we have in sysdata today can get moved into pci_host_bridge
over time, so a host bridge driver can just assign those members individually
between pci_create_host_bridge and __pci_scan_root_bus.
Arnd
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