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-rw-r--r--arch/mips/pci/pci.c80
1 files changed, 53 insertions, 27 deletions
diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index c7fe6ec621e..a377e9d2d02 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -34,6 +34,8 @@ static struct pci_controller *hose_head, **hose_tail = &hose_head;
unsigned long PCIBIOS_MIN_IO = 0x0000;
unsigned long PCIBIOS_MIN_MEM = 0;
+static int pci_initialized;
+
/*
* We need to avoid collisions with `mirrored' VGA ports
* and other strange ISA hardware, so we always want the
@@ -74,6 +76,42 @@ pcibios_align_resource(void *data, struct resource *res,
res->start = start;
}
+static void __devinit pcibios_scanbus(struct pci_controller *hose)
+{
+ static int next_busno;
+ static int need_domain_info;
+ struct pci_bus *bus;
+
+ if (!hose->iommu)
+ PCI_DMA_BUS_IS_PHYS = 1;
+
+ if (hose->get_busno && pci_probe_only)
+ next_busno = (*hose->get_busno)();
+
+ bus = pci_scan_bus(next_busno, hose->pci_ops, hose);
+ hose->bus = bus;
+
+ need_domain_info = need_domain_info || hose->index;
+ hose->need_domain_info = need_domain_info;
+ if (bus) {
+ next_busno = bus->subordinate + 1;
+ /* Don't allow 8-bit bus number overflow inside the hose -
+ reserve some space for bridges. */
+ if (next_busno > 224) {
+ next_busno = 0;
+ need_domain_info = 1;
+ }
+
+ if (!pci_probe_only) {
+ pci_bus_size_bridges(bus);
+ pci_bus_assign_resources(bus);
+ pci_enable_bridges(bus);
+ }
+ }
+}
+
+static DEFINE_MUTEX(pci_scan_mutex);
+
void __devinit register_pci_controller(struct pci_controller *hose)
{
if (request_resource(&iomem_resource, hose->mem_resource) < 0)
@@ -93,6 +131,17 @@ void __devinit register_pci_controller(struct pci_controller *hose)
printk(KERN_WARNING
"registering PCI controller with io_map_base unset\n");
}
+
+ /*
+ * Scan the bus if it is register after the PCI subsystem
+ * initialization.
+ */
+ if (pci_initialized) {
+ mutex_lock(&pci_scan_mutex);
+ pcibios_scanbus(hose);
+ mutex_unlock(&pci_scan_mutex);
+ }
+
return;
out:
@@ -125,38 +174,15 @@ static u8 __init common_swizzle(struct pci_dev *dev, u8 *pinp)
static int __init pcibios_init(void)
{
struct pci_controller *hose;
- struct pci_bus *bus;
- int next_busno;
- int need_domain_info = 0;
/* Scan all of the recorded PCI controllers. */
- for (next_busno = 0, hose = hose_head; hose; hose = hose->next) {
-
- if (!hose->iommu)
- PCI_DMA_BUS_IS_PHYS = 1;
-
- if (hose->get_busno && pci_probe_only)
- next_busno = (*hose->get_busno)();
-
- bus = pci_scan_bus(next_busno, hose->pci_ops, hose);
- hose->bus = bus;
- need_domain_info = need_domain_info || hose->index;
- hose->need_domain_info = need_domain_info;
- if (bus) {
- next_busno = bus->subordinate + 1;
- /* Don't allow 8-bit bus number overflow inside the hose -
- reserve some space for bridges. */
- if (next_busno > 224) {
- next_busno = 0;
- need_domain_info = 1;
- }
- }
- }
+ for (hose = hose_head; hose; hose = hose->next)
+ pcibios_scanbus(hose);
- if (!pci_probe_only)
- pci_assign_unassigned_resources();
pci_fixup_irqs(common_swizzle, pcibios_map_irq);
+ pci_initialized = 1;
+
return 0;
}