Does not allocate a child bus if the new bus number does not fit in the
parent's bus resource window.
Signed-off-by: Keith Busch <keith.busch@xxxxxxxxx>
---
drivers/pci/probe.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index edb1984..6e29f7a 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -704,6 +704,12 @@ static struct pci_bus *pci_alloc_child_bus(struct pci_bus *parent,
int i;
int ret;
+ if (busnr > parent->busn_res.end) {
+ dev_printk(KERN_DEBUG, &parent->dev,
+ "can not alloc bus:%d under %pR\n", busnr,
+ &parent->busn_res);
+ return NULL;
+ }
/*
* Allocate a new bus, and inherit stuff from the parent..
*/
--
2.6.2.307.g37023ba
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