I don't know if this is a right fix for the problem
since of_get_property can return NULL.
Since iseries_device_information is used only for informational purpose,
we can skip this function without valid HvSubBusNumber number.

Signed-off-by: Denis Kirjanov <dkirja...@kernel.org>
---
arch/powerpc/platforms/iseries/pci.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/platforms/iseries/pci.c 
b/arch/powerpc/platforms/iseries/pci.c
index 3fc2e64..ab3962b 100644
--- a/arch/powerpc/platforms/iseries/pci.c
+++ b/arch/powerpc/platforms/iseries/pci.c
@@ -445,7 +445,11 @@ void __init iSeries_pcibios_fixup_resources(struct pci_dev 
*pdev)
        }
 
        allocate_device_bars(pdev);
-       iseries_device_information(pdev, bus, *sub_bus);
+       if (likely(sub_bus))
+               iseries_device_information(pdev, bus, *sub_bus);
+       else
+               printk(KERN_ERR "PCI: Device node %s has missing or invalid "
+                               "linux,subbus property\n", node->full_name);
 }
 
 /*
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