| Message ID | 1425868467-9667-21-git-send-email-wangyijing@huawei.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On Mon, Mar 09, 2015 at 10:34:17AM +0800, Yijing Wang wrote: > Now we could use pci_scan_host_bridge() to scan > pci buses, provide sparc specific pci_host_bridge_ops. > > Signed-off-by: Yijing Wang <wangyijing@huawei.com> > CC: "David S. Miller" <davem@davemloft.net> > CC: sparclinux@vger.kernel.org > Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> > --- > arch/sparc/kernel/pci.c | 32 ++++++++++++++++++++++---------- > 1 files changed, 22 insertions(+), 10 deletions(-) > > diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c > index 21f804a..7e28f74 100644 > --- a/arch/sparc/kernel/pci.c > +++ b/arch/sparc/kernel/pci.c > @@ -650,12 +650,25 @@ static void pci_claim_bus_resources(struct pci_bus *bus) > pci_claim_bus_resources(child_bus); > } > > +static void pci_host_bridge_of_scan_bus( > + struct pci_host_bridge *host) > +{ > + struct pci_pbm_info *pbm = dev_get_drvdata(&host->dev); > + struct device_node *node = pbm->op->dev.of_node; > + > + pci_of_scan_bus(pbm, node, host->bus); > +} > + > +static struct pci_host_bridge_ops phb_ops = { > + .scan_bus = pci_host_bridge_of_scan_bus, > +}; > + > struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm, > struct device *parent) > { > LIST_HEAD(resources); > struct device_node *node = pbm->op->dev.of_node; > - struct pci_bus *bus; > + struct pci_host_bridge *host; > > printk("PCI: Scanning PBM %s\n", node->full_name); > > @@ -667,22 +680,21 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm, > pbm->busn.end = pbm->pci_last_busno; > pbm->busn.flags = IORESOURCE_BUS; > pci_add_resource(&resources, &pbm->busn); > - bus = pci_create_root_bus(parent, > + host = pci_scan_host_bridge(parent, > PCI_DOMBUS(pbm->index, pbm->pci_first_busno), > - pbm->pci_ops, pbm, &resources); > - if (!bus) { > - printk(KERN_ERR "Failed to create bus for %s\n", > + pbm->pci_ops, pbm, &resources, &phb_ops); > + if (!host) { > + printk(KERN_ERR "Failed to create host bridge for %s\n", > node->full_name); > pci_free_resource_list(&resources); > return NULL; > } > I would keep "bus" and set it here: bus = host->bus; That would remove some lines from your patch that really didn't change, which makes it easier to see what actually *is* changing, namely, you're removing the pci_of_scan_bus() call because it is now done inside pci_scan_host_bridge(). > - pci_of_scan_bus(pbm, node, bus); > - pci_bus_register_of_sysfs(bus); > + pci_bus_register_of_sysfs(host->bus); > > - pci_claim_bus_resources(bus); > - pci_bus_add_devices(bus); > - return bus; > + pci_claim_bus_resources(host->bus); > + pci_bus_add_devices(host->bus); > + return host->bus; > } > > void pcibios_fixup_bus(struct pci_bus *pbus) > -- > 1.7.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
>> @@ -667,22 +680,21 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm, >> pbm->busn.end = pbm->pci_last_busno; >> pbm->busn.flags = IORESOURCE_BUS; >> pci_add_resource(&resources, &pbm->busn); >> - bus = pci_create_root_bus(parent, >> + host = pci_scan_host_bridge(parent, >> PCI_DOMBUS(pbm->index, pbm->pci_first_busno), >> - pbm->pci_ops, pbm, &resources); >> - if (!bus) { >> - printk(KERN_ERR "Failed to create bus for %s\n", >> + pbm->pci_ops, pbm, &resources, &phb_ops); >> + if (!host) { >> + printk(KERN_ERR "Failed to create host bridge for %s\n", >> node->full_name); >> pci_free_resource_list(&resources); >> return NULL; >> } >> > > I would keep "bus" and set it here: > > bus = host->bus; > > That would remove some lines from your patch that really didn't change, > which makes it easier to see what actually *is* changing, namely, you're > removing the pci_of_scan_bus() call because it is now done inside > pci_scan_host_bridge(). > Yes, keep it will make the code more clean, thanks! >> - pci_of_scan_bus(pbm, node, bus); >> - pci_bus_register_of_sysfs(bus); >> + pci_bus_register_of_sysfs(host->bus); >> >> - pci_claim_bus_resources(bus); >> - pci_bus_add_devices(bus); >> - return bus; >> + pci_claim_bus_resources(host->bus); >> + pci_bus_add_devices(host->bus); >> + return host->bus; >> } >> >> void pcibios_fixup_bus(struct pci_bus *pbus) >> -- >> 1.7.1 >> > > . >
diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c index 21f804a..7e28f74 100644 --- a/arch/sparc/kernel/pci.c +++ b/arch/sparc/kernel/pci.c @@ -650,12 +650,25 @@ static void pci_claim_bus_resources(struct pci_bus *bus) pci_claim_bus_resources(child_bus); } +static void pci_host_bridge_of_scan_bus( + struct pci_host_bridge *host) +{ + struct pci_pbm_info *pbm = dev_get_drvdata(&host->dev); + struct device_node *node = pbm->op->dev.of_node; + + pci_of_scan_bus(pbm, node, host->bus); +} + +static struct pci_host_bridge_ops phb_ops = { + .scan_bus = pci_host_bridge_of_scan_bus, +}; + struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm, struct device *parent) { LIST_HEAD(resources); struct device_node *node = pbm->op->dev.of_node; - struct pci_bus *bus; + struct pci_host_bridge *host; printk("PCI: Scanning PBM %s\n", node->full_name); @@ -667,22 +680,21 @@ struct pci_bus *pci_scan_one_pbm(struct pci_pbm_info *pbm, pbm->busn.end = pbm->pci_last_busno; pbm->busn.flags = IORESOURCE_BUS; pci_add_resource(&resources, &pbm->busn); - bus = pci_create_root_bus(parent, + host = pci_scan_host_bridge(parent, PCI_DOMBUS(pbm->index, pbm->pci_first_busno), - pbm->pci_ops, pbm, &resources); - if (!bus) { - printk(KERN_ERR "Failed to create bus for %s\n", + pbm->pci_ops, pbm, &resources, &phb_ops); + if (!host) { + printk(KERN_ERR "Failed to create host bridge for %s\n", node->full_name); pci_free_resource_list(&resources); return NULL; } - pci_of_scan_bus(pbm, node, bus); - pci_bus_register_of_sysfs(bus); + pci_bus_register_of_sysfs(host->bus); - pci_claim_bus_resources(bus); - pci_bus_add_devices(bus); - return bus; + pci_claim_bus_resources(host->bus); + pci_bus_add_devices(host->bus); + return host->bus; } void pcibios_fixup_bus(struct pci_bus *pbus)