[PATCH] Fix wrong /proc/iomem on SGI Altix

In sn_io_slot_fixup(), the parent is re-set from the bus to
io(port|mem)_resource because the address is changed in a way that it's not
child of the bus any more.

However, only the root is set but not the parent/child/sibling relationship
in the resource tree which causes 'cat /proc/iomem' to stop after this
memory area.  Depding on the poition in the tree the iomem may be nearly
completely empty.

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Cc: John Keller <jpk@sgi.com>
Cc: Jay Lan <jlan@engr.sgi.com>
Acked-by: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 10 insertions, 2 deletions

diff --git a/arch/ia64/sn/kernel/io_init.c b/arch/ia64/sn/kernel/io_init.c
index 600be3ebae05..6b10e5d28488 100644
--- a/arch/ia64/sn/kernel/io_init.c
+++ b/arch/ia64/sn/kernel/io_init.c
@@ -247,10 +247,18 @@ sn_io_slot_fixup(struct pci_dev *dev)
                 addr = ((addr << 4) >> 4) | __IA64_UNCACHED_OFFSET;
                 dev->resource[idx].start = addr;
                 dev->resource[idx].end = addr + size;
+
+                /*
+                 * if it's already in the device structure, remove it before
+                 * inserting
+                 */
+                if (dev->resource[idx].parent && dev->resource[idx].parent->child)
+                        release_resource(&dev->resource[idx]);
+
                 if (dev->resource[idx].flags & IORESOURCE_IO)
-                        dev->resource[idx].parent = &ioport_resource;
+                        insert_resource(&ioport_resource, &dev->resource[idx]);
                 else
-                        dev->resource[idx].parent = &iomem_resource;
+                        insert_resource(&iomem_resource, &dev->resource[idx]);
                 /* If ROM, mark as shadowed in PROM */
                 if (idx == PCI_ROM_RESOURCE)
                         dev->resource[idx].flags |= IORESOURCE_ROM_BIOS_COPY;