powerpc: Fix IDE legacy vs. native fixups

PowerMac and CHRP/BriQ platforms have quirks to switch some IDE
controllers from legacy mode to fully native mode. Those quirks
however will not work properly anymore due to a change to the
generic code to better handle legacy IDE resources.

This fixes it by moving those quirk to "early" quirks (so they
run before resources are probed for the devices) and clearing
all BARs after the conversion to force a reallocation of sane
values.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 9 insertions, 2 deletions

diff --git a/arch/powerpc/platforms/powermac/pci.c b/arch/powerpc/platforms/powermac/pci.c
index ec49099830d5..f852ae3e0ee4 100644
--- a/arch/powerpc/platforms/powermac/pci.c
+++ b/arch/powerpc/platforms/powermac/pci.c
@@ -1243,15 +1243,22 @@ void pmac_pci_fixup_pciata(struct pci_dev* dev)
  good:
         pci_read_config_byte(dev, PCI_CLASS_PROG, &progif);
         if ((progif & 5) != 5) {
-                printk(KERN_INFO "Forcing PCI IDE into native mode: %s\n",
+                printk(KERN_INFO "PCI: %s Forcing PCI IDE into native mode\n",
                        pci_name(dev));
                 (void) pci_write_config_byte(dev, PCI_CLASS_PROG, progif|5);
                 if (pci_read_config_byte(dev, PCI_CLASS_PROG, &progif) ||
                     (progif & 5) != 5)
                         printk(KERN_ERR "Rewrite of PROGIF failed !\n");
+                else {
+                        /* Clear IO BARs, they will be reassigned */
+                        pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 0);
+                        pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, 0);
+                        pci_write_config_dword(dev, PCI_BASE_ADDRESS_2, 0);
+                        pci_write_config_dword(dev, PCI_BASE_ADDRESS_3, 0);
+                }
         }
 }
-DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pmac_pci_fixup_pciata);
+DECLARE_PCI_FIXUP_EARLY(PCI_ANY_ID, PCI_ANY_ID, pmac_pci_fixup_pciata);
 #endif
 
 /*