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[PATCH] acpi bridge hotadd: Make pcibios_fixup_bus() hot-plug safe 

PCI scan code calls the arch specific pcibios_fixup_bus() each time it scans a
new bridge.  For root bridge hot-plug, the bridge and it's attached devices
may not have been configured properly yet, so it's not safe to claim those
resources at this time.

This code goes away when we clean up the way pci resources are claimed (in
pci_enable_device()), so this is only a stopgap fix.

Signed-off-by: Rajesh Shah <rajesh.shah@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Rajesh Shah 2005-04-28 00:25:46 -07:00 committed by Greg Kroah-Hartman
parent fab3fb0ac8
commit 71c3511c22
1 changed files with 21 additions and 1 deletions
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22
arch/ia64/pci/pci.c
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@ -373,6 +373,25 @@ void pcibios_bus_to_resource(struct pci_dev *dev,
res->end = region->end + offset;
}
static int __devinit is_valid_resource(struct pci_dev *dev, int idx)
{
unsigned int i, type_mask = IORESOURCE_IO | IORESOURCE_MEM;
struct resource *devr = &dev->resource[idx];
if (!dev->bus)
return 0;
for (i=0; i<PCI_BUS_NUM_RESOURCES; i++) {
struct resource *busr = dev->bus->resource[i];
if (!busr || ((busr->flags ^ devr->flags) & type_mask))
continue;
if ((devr->start) && (devr->start >= busr->start) &&
(devr->end <= busr->end))
return 1;
}
return 0;
}
static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
{
struct pci_bus_region region;
@ -386,7 +405,8 @@ static void __devinit pcibios_fixup_device_resources(struct pci_dev *dev)
region.start = dev->resource[i].start;
region.end = dev->resource[i].end;
pcibios_bus_to_resource(dev, &dev->resource[i], &region);
pci_claim_resource(dev, i);
if ((is_valid_resource(dev, i)))
pci_claim_resource(dev, i);
}
}