children bridges busn range should be able to be allocated from parent bus range.
to avoid overlapping between sibling bridges on same bus.
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
drivers/pci/probe.c | 27 +++++++++++++++++++++++++++
1 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 83df3fb..e12f65f0 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -791,6 +791,33 @@ reduce_needed_size:
return ret;
}
+static int __devinit pci_bridge_check_busn_res(struct pci_bus *bus,
+ struct pci_dev *dev,
+ int secondary, int subordinate)
+{
+ int broken = 0;
+
+ struct resource busn_res;
+ int ret;
+
+ memset(&busn_res, 0, sizeof(struct resource));
+ dev_printk(KERN_DEBUG, &dev->dev,
+ "check if busn %02x-%02x is in busn_res: %06llx-%06llx\n",
+ secondary, subordinate,
+ (unsigned long long)bus->busn_res.start,
+ (unsigned long long)bus->busn_res.end);
+ ret = allocate_resource(&bus->busn_res, &busn_res,
+ (subordinate - secondary + 1),
+ (pci_domain_nr(bus)<<8) | secondary,
+ (pci_domain_nr(bus)<<8) | subordinate,
+ 1, NULL, NULL);
+ if (ret)
+ broken = 1;
+ else
+ release_resource(&busn_res);
+
+ return broken;
+}
/*
* If it's a bridge, configure it and scan the bus behind it.
* For CardBus bridges, we don't scan behind as the devices will
--
1.7.7
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