On Monday 19 January 2015 11:12:50 Yijing Wang wrote:
On 2015/1/16 17:18, Arnd Bergmann wrote:
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.
I put the sysdata in pci_host_bridge, because some platforms x86/ia64
need to call pcibios_root_bridge_prepare() before pci_host_bridge registration
in pci_create_host_bridge(), and pcibios_root_bridge_prepare() need the companion
acpi device pointer which is stored in sysdata.
I like you idea, but I haven't find a better way yet.
Ok, fair enough. We can always try to find ways for getting rid of
pcibios_root_bridge_prepare() later, though I suspect as soon as we
have the callback, it will get used for other things as well ;-)
Arnd
--
To unsubscribe from this list: send the line "unsubscribe linux-m68k" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
