[PATCH for review] [76/145] x86_64: Calgary IOMMU: break out of pci_find_device_reverse if dev not found

[Andi Kleen]

r

From: Muli Ben-Yehuda <muli@xxxxxxxxxx>

Signed-off-by: Muli Ben-Yehuda <muli@xxxxxxxxxx>
Signed-off-by: Jon Mason <jdmason@xxxxxxxxxx>
Signed-off-by: Andi Kleen <ak@xxxxxxx>

---
 arch/x86_64/kernel/pci-calgary.c |    2 ++
 1 files changed, 2 insertions(+)

Index: linux/arch/x86_64/kernel/pci-calgary.c
===================================================================
--- linux.orig/arch/x86_64/kernel/pci-calgary.c
+++ linux/arch/x86_64/kernel/pci-calgary.c
@@ -844,6 +844,8 @@ error:
 		dev = pci_find_device_reverse(PCI_VENDOR_ID_IBM,
 					      PCI_DEVICE_ID_IBM_CALGARY,
 					      dev);
+		if (!dev)
+			break;
 		if (!translate_phb(dev)) {
 			pci_dev_put(dev);
 			continue;
-
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