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powerpc/pci: Make pcibios_allocate_bus_resources more robust

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To properly fix PCI hotplug, it's useful to be able to make the fixup
passes on all devices whether they were just hot plugged or already
there.

However, pcibios_allocate_bus_resources() wouldn't cope well with
being called twice for a given bus.  This makes it ignore resources
that have already been allocated, along with adding a bit of debug
output.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2008-10-27 19:48:44 +00:00 committed by Paul Mackerras
parent 57b066ff4e
commit b5ae5f911d
1 changed files with 4 additions and 1 deletions
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5
arch/powerpc/kernel/pci-common.c
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@ -1243,9 +1243,12 @@ void pcibios_allocate_bus_resources(struct pci_bus *bus)
int i;
struct resource *res, *pr;
pr_debug("PCI: Allocating bus resources for %04x:%02x...\n",
pci_domain_nr(bus), bus->number);
for (i = 0; i < PCI_BUS_NUM_RESOURCES; ++i) {
if ((res = bus->resource[i]) == NULL || !res->flags
|| res->start > res->end)
|| res->start > res->end || res->parent)
continue;
if (bus->parent == NULL)
pr = (res->flags & IORESOURCE_IO) ?