parisc/PCI: register busn_res for root buses
Yinghai Lu [Fri, 18 May 2012 01:51:12 +0000 (18:51 -0700)]
Add the host bridge bus number aperture to the resource list.
Like the MMIO and I/O port apertures, this is used when assigning
resources to hot-added devices or in the case of conflicts.

[bhelgaas: changelog, set flags directly, at LBA bus_num init]
CC: Kyle McMartin <kyle@mcmartin.ca>
CC: Helge Deller <deller@gmx.de>
CC: linux-parisc@vger.kernel.org
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

drivers/parisc/dino.c
drivers/parisc/lba_pci.c

index 70517b0..ffddc4f 100644 (file)
@@ -898,6 +898,7 @@ static int __init dino_probe(struct parisc_device *dev)
        LIST_HEAD(resources);
        struct pci_bus *bus;
        unsigned long hpa = dev->hpa.start;
+       int max;
 
        name = "Dino";
        if (is_card_dino(&dev->id)) {
@@ -983,6 +984,10 @@ static int __init dino_probe(struct parisc_device *dev)
        if (dino_dev->hba.gmmio_space.flags)
                pci_add_resource(&resources, &dino_dev->hba.gmmio_space);
 
+       dino_dev->hba.bus_num.start = dino_current_bus;
+       dino_dev->hba.bus_num.end = 255;
+       dino_dev->hba.bus_num.flags = IORESOURCE_BUS;
+       pci_add_resource(&resources, &dino_dev->hba.bus_num);
        /*
        ** It's not used to avoid chicken/egg problems
        ** with configuration accessor functions.
@@ -998,12 +1003,13 @@ static int __init dino_probe(struct parisc_device *dev)
                return 0;
        }
 
-       bus->busn_res.end = pci_scan_child_bus(bus);
+       max = pci_scan_child_bus(bus);
+       pci_bus_update_busn_res_end(bus, max);
 
        /* This code *depends* on scanning being single threaded
         * if it isn't, this global bus number count will fail
         */
-       dino_current_bus = bus->busn_res.end + 1;
+       dino_current_bus = max + 1;
        pci_bus_assign_resources(bus);
        pci_bus_add_devices(bus);
        return 0;
index cd8f9ce..4f9cf24 100644 (file)
@@ -989,6 +989,7 @@ lba_pat_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev)
                case PAT_PBNUM:
                        lba_dev->hba.bus_num.start = p->start;
                        lba_dev->hba.bus_num.end   = p->end;
+                       lba_dev->hba.bus_num.flags = IORESOURCE_BUS;
                        break;
 
                case PAT_LMMIO:
@@ -1366,6 +1367,7 @@ lba_driver_probe(struct parisc_device *dev)
        void *tmp_obj;
        char *version;
        void __iomem *addr = ioremap_nocache(dev->hpa.start, 4096);
+       int max;
 
        /* Read HW Rev First */
        func_class = READ_REG32(addr + LBA_FCLASS);
@@ -1502,6 +1504,8 @@ lba_driver_probe(struct parisc_device *dev)
        if (lba_dev->hba.gmmio_space.flags)
                pci_add_resource(&resources, &lba_dev->hba.gmmio_space);
 
+       pci_add_resource(&resources, &lba_dev->hba.bus_num);
+
        dev->dev.platform_data = lba_dev;
        lba_bus = lba_dev->hba.hba_bus =
                pci_create_root_bus(&dev->dev, lba_dev->hba.bus_num.start,
@@ -1511,7 +1515,7 @@ lba_driver_probe(struct parisc_device *dev)
                return 0;
        }
 
-       lba_bus->busn_res.end = pci_scan_child_bus(lba_bus);
+       max = pci_scan_child_bus(lba_bus);
 
        /* This is in lieu of calling pci_assign_unassigned_resources() */
        if (is_pdc_pat()) {
@@ -1541,7 +1545,7 @@ lba_driver_probe(struct parisc_device *dev)
                lba_dev->flags |= LBA_FLAG_SKIP_PROBE;
        }
 
-       lba_next_bus = lba_res->busn_res.end + 1;
+       lba_next_bus = max + 1;
        pci_bus_add_devices(lba_bus);
 
        /* Whew! Finally done! Tell services we got this one covered. */