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| author | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2017-06-28 23:14:01 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-07-03 00:14:27 +0300 |
| commit | 123db533072e58838e32ba9ffc102c476788ec2b (patch) | |
| tree | db319009ee9c7a81341d904b8f8609de39e2ecb6 /drivers/pci/host/pcie-xilinx-nwl.c | |
| parent | ae13cb9b1926e821ab8b5f00995f829f10d9fa20 (diff) | |
| download | linux-123db533072e58838e32ba9ffc102c476788ec2b.tar.xz | |
PCI: xilinx-nwl: Convert PCI scan API to pci_scan_root_bus_bridge()
The introduction of pci_scan_root_bus_bridge() provides a PCI core API to
scan a PCI root bus backed by an already initialized struct pci_host_bridge
object, which simplifies the bus scan interface and makes the PCI scan root
bus interface easier to generalize as members are added to the struct
pci_host_bridge.
Convert PCI xilinx-nwl host code to pci_scan_root_bus_bridge() to improve
the PCI root bus scanning interface.
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com>
Diffstat (limited to 'drivers/pci/host/pcie-xilinx-nwl.c')
| -rw-r--r-- | drivers/pci/host/pcie-xilinx-nwl.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/drivers/pci/host/pcie-xilinx-nwl.c b/drivers/pci/host/pcie-xilinx-nwl.c index 26e66e8eebbb..e8a589431008 100644 --- a/drivers/pci/host/pcie-xilinx-nwl.c +++ b/drivers/pci/host/pcie-xilinx-nwl.c @@ -791,13 +791,16 @@ static int nwl_pcie_probe(struct platform_device *pdev) struct nwl_pcie *pcie; struct pci_bus *bus; struct pci_bus *child; + struct pci_host_bridge *bridge; int err; resource_size_t iobase = 0; LIST_HEAD(res); - pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL); - if (!pcie) - return -ENOMEM; + bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie)); + if (!bridge) + return -ENODEV; + + pcie = pci_host_bridge_priv(bridge); pcie->dev = dev; pcie->ecam_value = NWL_ECAM_VALUE_DEFAULT; @@ -830,12 +833,11 @@ static int nwl_pcie_probe(struct platform_device *pdev) goto error; } - bus = pci_create_root_bus(dev, pcie->root_busno, - &nwl_pcie_ops, pcie, &res); - if (!bus) { - err = -ENOMEM; - goto error; - } + list_splice_init(&res, &bridge->windows); + bridge->dev.parent = dev; + bridge->sysdata = pcie; + bridge->busnr = pcie->root_busno; + bridge->ops = &nwl_pcie_ops; if (IS_ENABLED(CONFIG_PCI_MSI)) { err = nwl_pcie_enable_msi(pcie); @@ -844,7 +846,13 @@ static int nwl_pcie_probe(struct platform_device *pdev) goto error; } } - pci_scan_child_bus(bus); + + err = pci_scan_root_bus_bridge(bridge); + if (err) + goto error; + + bus = bridge->bus; + pci_assign_unassigned_bus_resources(bus); list_for_each_entry(child, &bus->children, node) pcie_bus_configure_settings(child); |