powerpc/pci: Fix checking for child bridges in PCI code.

pci_device_to_OF_node() can return null, and list_for_each_entry will
never enter the loop when dev is NULL, so it looks like this test is
a typo.

Reported-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c
index 62dd363a9762..e751506323b4 100644
--- a/arch/powerpc/kernel/pci_of_scan.c
+++ b/arch/powerpc/kernel/pci_of_scan.c
@@ -336,7 +336,8 @@ static void __devinit __of_scan_bus(struct device_node *node,
                 if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
                     dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) {
                         struct device_node *child = pci_device_to_OF_node(dev);
-                        of_scan_pci_bridge(child, dev);
+                        if (child)
+                                of_scan_pci_bridge(child, dev);
                 }
         }
 }