[PATCH] acpi bridge hotadd: Remove hot-plugged devices that could not be allocated resources

When hot-plugging an I/O hierarchy that contains many bridges and leaf
devices, it's possible that there are not enough resources to start all the
device present.  If we fail to assign a resource, clear the corresponding
value in the pci_dev structure, so other code can take corrective action.

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>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 1ba84be0b4c0..6b628de948af 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -72,7 +72,10 @@ pbus_assign_resources_sorted(struct pci_bus *bus)
         for (list = head.next; list;) {
                 res = list->res;
                 idx = res - &list->dev->resource[0];
-                pci_assign_resource(list->dev, idx);
+                if (pci_assign_resource(list->dev, idx)) {
+                        res->start = 0;
+                        res->flags = 0;
+                }
                 tmp = list;
                 list = list->next;
                 kfree(tmp);