devicetree: add helper inline for retrieving a node's full name

The pattern (np ? np->full_name : "<none>") is rather common in the
kernel, but can also make for quite long lines.  This patch adds a new
inline function, of_node_full_name() so that the test for a valid node
pointer doesn't need to be open coded at all call sites.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rob Herring <rob.herring@calxeda.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index b9f509a34c0..b6732004c88 100644
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -552,8 +552,7 @@ static struct iommu_table *cell_get_iommu_table(struct device *dev)
         iommu = cell_iommu_for_node(dev_to_node(dev));
         if (iommu == NULL || list_empty(&iommu->windows)) {
                 printk(KERN_ERR "iommu: missing iommu for %s (node %d)\n",
-                       dev->of_node ? dev->of_node->full_name : "?",
-                       dev_to_node(dev));
+                       of_node_full_name(dev->of_node), dev_to_node(dev));
                 return NULL;
         }
         window = list_entry(iommu->windows.next, struct iommu_window, list);