diff options
| author | David Daney <david.daney@cavium.com> | 2011-08-16 11:24:37 -0700 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2011-08-19 08:51:37 -0700 |
| commit | 69566dd8be42dea7a22f625abc96e65bb4b45d1f (patch) | |
| tree | 48e73a52bd8b79b5b8674243b54b5f2e346e5b9b /drivers/pci/of.c | |
| parent | debc3b778508f59696ff188f0feca271dcbfa7d9 (diff) | |
| download | lwn-69566dd8be42dea7a22f625abc96e65bb4b45d1f.tar.gz lwn-69566dd8be42dea7a22f625abc96e65bb4b45d1f.zip | |
PCI: OF: Don't crash when bridge parent is NULL.
In pcibios_get_phb_of_node(), we will crash while booting if
bus->bridge->parent is NULL.
Check for this case and avoid dereferencing the NULL pointer.
Signed-off-by: David Daney <david.daney@cavium.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/of.c')
| -rw-r--r-- | drivers/pci/of.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/pci/of.c b/drivers/pci/of.c index c94d37ec55c8..f0929934bb7a 100644 --- a/drivers/pci/of.c +++ b/drivers/pci/of.c @@ -55,7 +55,7 @@ struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus) */ if (bus->bridge->of_node) return of_node_get(bus->bridge->of_node); - if (bus->bridge->parent->of_node) + if (bus->bridge->parent && bus->bridge->parent->of_node) return of_node_get(bus->bridge->parent->of_node); return NULL; } |