[PATCH v9 21/30] sparc/PCI: Use pci_scan_host_bridge() for simplicity

Yijing Wang
2015-04-03T09:25:55Z

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
---
arch/sparc/kernel/pci.c | 28 ++++++++++++++++++++++------
1 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index e40e456..fa95a1d 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -650,12 +650,27 @@ static void pci_claim_bus_resources(struct pci_bus *bus)
pci_claim_bus_resources(child_bus);
}

+static int pci_host_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);
+ return pci_bus_child_max_busnr(host->bus);
+}
+
+static struct pci_host_bridge_ops pci_host_ops = {
+ .scan_bus = pci_host_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);

@@ -667,16 +682,17 @@ 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, pbm->index, pbm->pci_first_busno,
- pbm->pci_ops, pbm, &resources);
- if (!bus) {
- printk(KERN_ERR "Failed to create bus for %s\n",
- node->full_name);
+ pci_host_ops.pci_ops = pbm->pci_ops;
+ host = pci_scan_host_bridge(parent, pbm->index, pbm->pci_first_busno,
+ pbm, &resources, &pci_host_ops);
+ if (!host) {
+ pr_err("Failed to create host bridge pci%04x:%02x for %s\n",
+ pbm->index, pbm->pci_first_busno, node->full_name);
pci_free_resource_list(&resources);
return NULL;
}

- pci_of_scan_bus(pbm, node, bus);
+ bus = host->bus;
pci_bus_register_of_sysfs(bus);

pci_claim_bus_resources(bus);
--
1.7.1