[PATCH] pipe: remove redundant fifo_poll abstraction

[linux-2.6] / drivers / pci / probe.c

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 6186f4d7b1192fc65bd0a7d9fde2357c883f0cc9..93e8a878ea951d379c2c1af147193928c728c480 100644 (file)
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -239,9 +239,8 @@ void __devinit pci_read_bridge_bases(struct pci_bus *child)
 
        if (dev->transparent) {
                printk(KERN_INFO "PCI: Transparent bridge - %s\n", pci_name(dev));
-               for(i = 0; i < PCI_BUS_NUM_RESOURCES; i++)
-                       child->resource[i] = child->parent->resource[i];
-               return;
+               for(i = 3; i < PCI_BUS_NUM_RESOURCES; i++)
+                       child->resource[i] = child->parent->resource[i - 3];
        }
 
        for(i=0; i<3; i++)
@@ -374,8 +373,11 @@ struct pci_bus * __devinit pci_add_new_bus(struct pci_bus *parent, struct pci_de
        struct pci_bus *child;
 
        child = pci_alloc_child_bus(parent, dev, busnr);
-       if (child)
+       if (child) {
+               spin_lock(&pci_bus_lock);
                list_add_tail(&child->node, &parent->children);
+               spin_unlock(&pci_bus_lock);
+       }
        return child;
 }
 
@@ -395,6 +397,16 @@ static void pci_enable_crs(struct pci_dev *dev)
        pci_write_config_word(dev, rpcap + PCI_EXP_RTCTL, rpctl);
 }
 
+static void __devinit pci_fixup_parent_subordinate_busnr(struct pci_bus *child, int max)
+{
+       struct pci_bus *parent = child->parent;
+       while (parent->parent && parent->subordinate < max) {
+               parent->subordinate = max;
+               pci_write_config_byte(parent->self, PCI_SUBORDINATE_BUS, max);
+               parent = parent->parent;
+       }
+}
+
 unsigned int __devinit pci_scan_child_bus(struct pci_bus *bus);
 
 /*
@@ -447,7 +459,7 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max
                        return max;
                }
 
-               child = pci_alloc_child_bus(bus, dev, busnr);
+               child = pci_add_new_bus(bus, dev, busnr);
                if (!child)
                        return max;
                child->primary = buses & 0xFF;
@@ -474,7 +486,7 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max
                 * This can happen when a bridge is hot-plugged */
                if (pci_find_bus(pci_domain_nr(bus), max+1))
                        return max;
-               child = pci_alloc_child_bus(bus, dev, ++max);
+               child = pci_add_new_bus(bus, dev, ++max);
                buses = (buses & 0xff000000)
                      | ((unsigned int)(child->primary)     <<  0)
                      | ((unsigned int)(child->secondary)   <<  8)
@@ -495,8 +507,14 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max
                pci_write_config_dword(dev, PCI_PRIMARY_BUS, buses);
 
                if (!is_cardbus) {
-                       child->bridge_ctl = PCI_BRIDGE_CTL_NO_ISA;
-
+                       child->bridge_ctl = bctl | PCI_BRIDGE_CTL_NO_ISA;
+                       /*
+                        * Adjust subordinate busnr in parent buses.
+                        * We do this before scanning for children because
+                        * some devices may not be detected if the bios
+                        * was lazy.
+                        */
+                       pci_fixup_parent_subordinate_busnr(child, max);
                        /* Now we can scan all subordinate buses... */
                        max = pci_scan_child_bus(child);
                } else {
@@ -510,6 +528,7 @@ int __devinit pci_scan_bridge(struct pci_bus *bus, struct pci_dev * dev, int max
                                                        max+i+1))
                                        break;
                        max += i;
+                       pci_fixup_parent_subordinate_busnr(child, max);
                }
                /*
                 * Set the subordinate bus number to its real value.
@@ -765,7 +784,9 @@ pci_scan_single_device(struct pci_bus *bus, int devfn)
         * and the bus list for fixup functions, etc.
         */
        INIT_LIST_HEAD(&dev->global_list);
+       spin_lock(&pci_bus_lock);
        list_add_tail(&dev->bus_list, &bus->devices);
+       spin_unlock(&pci_bus_lock);
 
        return dev;
 }
@@ -886,7 +907,9 @@ struct pci_bus * __devinit pci_scan_bus_parented(struct device *parent, int bus,
                pr_debug("PCI: Bus %04x:%02x already known\n", pci_domain_nr(b), bus);
                goto err_out;
        }
+       spin_lock(&pci_bus_lock);
        list_add_tail(&b->node, &pci_root_buses);
+       spin_unlock(&pci_bus_lock);
 
        memset(dev, 0, sizeof(*dev));
        dev->parent = parent;
@@ -928,7 +951,9 @@ class_dev_create_file_err:
 class_dev_reg_err:
        device_unregister(dev);
 dev_reg_err:
+       spin_lock(&pci_bus_lock);
        list_del(&b->node);
+       spin_unlock(&pci_bus_lock);
 err_out:
        kfree(dev);
        kfree(b);