On Tue, Feb 18, 2014 at 02:33:53PM +0800, Yijing Wang wrote:
> > +#include <linux/init.h>
> > +#include <linux/io.h>
> > +#include <linux/kernel.h>
> > +#include <linux/mm.h>
> > +#include <linux/of_pci.h>
> > +#include <linux/of_platform.h>
> > +#include <linux/slab.h>
> > +
> > +#include <asm/pci-bridge.h>
> > +
> > +
> > +/*
> > + * Return the domain number for this bus
> > + */
> > +int pci_domain_nr(struct pci_bus *bus)
> > +{
> > + struct pci_host_bridge *bridge = to_pci_host_bridge(bus->bridge);
Hi Yijing,
>
> Here bus is specific to root bus ? or, what about use find_pci_host_bridge() to get the pci_host_bridge
> instead.
Yes, the call should be to find_pci_host_bridge(). I sort of implied that the
bus is always the root bus, which is obviously not correct. Thanks for pointing it out.
>
> > +
> > + if (bridge)
> > + return bridge->domain_nr;
> > +
> > + return 0;
> > +}
> > +
> > +int pci_proc_domain(struct pci_bus *bus)
> > +{
> > + return pci_domain_nr(bus);
> > +}
> > +
> > +/*
> > + * Called after each bus is probed, but before its children are examined
> > + */
> > +void pcibios_fixup_bus(struct pci_bus *bus)
> > +{
> > + struct pci_dev *dev;
> > + struct resource *res;
> > + int i;
> > +
> > + if (bus->self != NULL) {
>
> What about use !pci_is_root_bus() ?
Again, good call, will change.
>
> > + pci_read_bridge_bases(bus);
> > +
> > + pci_bus_for_each_resource(bus, res, i) {
> > + if (!res || !res->flags || res->parent)
> > + continue;
> > +
> > + /*
> > + * If we are going to reassign everything, we can
> > + * shrink the P2P resource to have zero size to
> > + * save space
> > + */
> > + if (pci_has_flag(PCI_REASSIGN_ALL_RSRC)) {
> > + res->flags |= IORESOURCE_UNSET;
> > + res->start = 0;
> > + res->end = -1;
> > + continue;
> > + }
> > + }
> > + }
> > +
>
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