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-rw-r--r--arch/powerpc/kernel/of_platform.c10
-rw-r--r--arch/powerpc/kernel/pci_64.c23
2 files changed, 28 insertions, 5 deletions
diff --git a/arch/powerpc/kernel/of_platform.c b/arch/powerpc/kernel/of_platform.c
index 84c34d979a88..d501c23e5159 100644
--- a/arch/powerpc/kernel/of_platform.c
+++ b/arch/powerpc/kernel/of_platform.c
@@ -427,11 +427,13 @@ static int __devinit of_pci_phb_probe(struct of_device *dev,
/* Process "ranges" property */
pci_process_bridge_OF_ranges(phb, dev->node, 0);
- /* Setup IO space.
- * This will not work properly for ISA IOs, something needs to be done
- * about it if we ever generalize that way of probing PCI brigdes
+ /* Setup IO space. We use the non-dynamic version of that code here,
+ * which doesn't quite support unplugging. Next kernel release will
+ * have a better fix for this.
+ * Note also that we don't do ISA, this will also be fixed with a
+ * more massive rework.
*/
- pci_setup_phb_io_dynamic(phb, 0);
+ pci_setup_phb_io(phb, 0);
/* Init pci_dn data structures */
pci_devs_phb_init_dynamic(phb);
diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c
index b0409e19b1c1..249cca27a9b8 100644
--- a/arch/powerpc/kernel/pci_64.c
+++ b/arch/powerpc/kernel/pci_64.c
@@ -41,6 +41,7 @@
unsigned long pci_probe_only = 1;
int pci_assign_all_buses = 0;
+static int pci_initial_scan_done;
static void fixup_resource(struct resource *res, struct pci_dev *dev);
static void do_bus_setup(struct pci_bus *bus);
@@ -604,6 +605,8 @@ static int __init pcibios_init(void)
/* map in PCI I/O space */
phbs_remap_io();
+ pci_initial_scan_done = 1;
+
printk(KERN_DEBUG "PCI: Probing PCI hardware done\n");
return 0;
@@ -1042,13 +1045,16 @@ void __devinit pci_process_bridge_OF_ranges(struct pci_controller *hose,
}
}
-void __init pci_setup_phb_io(struct pci_controller *hose, int primary)
+void __devinit pci_setup_phb_io(struct pci_controller *hose, int primary)
{
unsigned long size = hose->pci_io_size;
unsigned long io_virt_offset;
struct resource *res;
struct device_node *isa_dn;
+ if (size == 0)
+ return;
+
hose->io_base_virt = reserve_phb_iospace(size);
DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
hose->global_number, hose->io_base_phys,
@@ -1069,6 +1075,15 @@ void __init pci_setup_phb_io(struct pci_controller *hose, int primary)
res = &hose->io_resource;
res->start += io_virt_offset;
res->end += io_virt_offset;
+
+ /* If this is called after the initial PCI scan, then we need to
+ * proceed to IO mappings now
+ */
+ if (pci_initial_scan_done)
+ __ioremap_explicit(hose->io_base_phys,
+ (unsigned long)hose->io_base_virt,
+ hose->pci_io_size,
+ _PAGE_NO_CACHE | _PAGE_GUARDED);
}
void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose,
@@ -1078,6 +1093,9 @@ void __devinit pci_setup_phb_io_dynamic(struct pci_controller *hose,
unsigned long io_virt_offset;
struct resource *res;
+ if (size == 0)
+ return;
+
hose->io_base_virt = __ioremap(hose->io_base_phys, size,
_PAGE_NO_CACHE | _PAGE_GUARDED);
DBG("phb%d io_base_phys 0x%lx io_base_virt 0x%lx\n",
@@ -1106,6 +1124,9 @@ static int get_bus_io_range(struct pci_bus *bus, unsigned long *start_phys,
/* Root Bus */
res = &hose->io_resource;
+ if (res->end == 0 && res->start == 0)
+ return 1;
+
*start_virt = pci_io_base + res->start;
*start_phys = *start_virt + hose->io_base_phys
- (unsigned long) hose->io_base_virt;