[POWERPC] fix iSeries PCI resource management

The way iSeries manages PCI IO and Memory resources is a bit strange
and is based on overriding the content of those resources with home
cooked ones afterward.

This changes it a bit to better integrate with the new resource handling
so that the "virtual" tokens that iSeries replaces resources with are
done from the proper per-device fixup hook, and bridge resources are
set to enclose that token space.  This fixes various things such as
the output of /proc/iomem & ioports, among others.  This also fixes up
various boot messages as well.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 15 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index d804c8d0be00..f706b7e83d7e 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -190,6 +190,20 @@ int pci_read_irq_line(struct pci_dev *pci_dev)
         struct of_irq oirq;
         unsigned int virq;
 
+        /* The current device-tree that iSeries generates from the HV
+         * PCI informations doesn't contain proper interrupt routing,
+         * and all the fallback would do is print out crap, so we
+         * don't attempt to resolve the interrupts here at all, some
+         * iSeries specific fixup does it.
+         *
+         * In the long run, we will hopefully fix the generated device-tree
+         * instead.
+         */
+#ifdef CONFIG_PPC_ISERIES
+        if (firmware_has_feature(FW_FEATURE_ISERIES))
+                return -1;
+#endif
+
         DBG("Try to map irq for %s...\n", pci_name(pci_dev));
 
 #ifdef DEBUG
@@ -946,7 +960,7 @@ static void __init pcibios_allocate_bus_resources(struct list_head *bus_list)
                             || res->start > res->end)
                                 continue;
                         if (bus->parent == NULL)
-                                pr = (res->flags & IORESOURCE_IO)?
+                                pr = (res->flags & IORESOURCE_IO) ?
                                         &ioport_resource : &iomem_resource;
                         else {
                                 /* Don't bother with non-root busses when