linux-kernel - [PATCH] powerpc/pci: fix checking for child bridges in PCI code.

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Date:	Wed, 18 Aug 2010 12:27:55 -0600
From:	Grant Likely <grant.likely@...retlab.ca>
To:	benh@...nel.crashing.org, linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org
Cc:	Julia Lawall <julia@...u.dk>
Subject: [PATCH] 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@...u.dk>
Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
---
 arch/powerpc/kernel/pci_of_scan.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/kernel/pci_of_scan.c b/arch/powerpc/kernel/pci_of_scan.c
index 6ddb795..e751506 100644
--- a/arch/powerpc/kernel/pci_of_scan.c
+++ b/arch/powerpc/kernel/pci_of_scan.c
@@ -336,7 +336,7 @@ 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);
-			if (dev)
+			if (child)
 				of_scan_pci_bridge(child, dev);
 		}
 	}

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