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Date: Tue, 16 Aug 2011 11:24:37 -0700 From: David Daney <david.daney@...ium.com> To: linux-kernel@...r.kernel.org Cc: David Daney <david.daney@...ium.com>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Jesse Barnes <jbarnes@...tuousgeek.org>, linux-pci@...r.kernel.org, Grant Likely <grant.likely@...retlab.ca> Subject: [PATCH] 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@...ium.com> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org> Cc: Jesse Barnes <jbarnes@...tuousgeek.org> Cc: linux-pci@...r.kernel.org Cc: Grant Likely <grant.likely@...retlab.ca> --- 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 c94d37e..f092993 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; } -- 1.7.2.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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