From: Julia Lawall <julia.law...@lip6.fr>

Of_node_put supports NULL as its argument, so the initial test is not
necessary.

Suggested by Uwe Kleine-König.

The semantic patch that fixes this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression e;
@@

-if (e)
   of_node_put(e);
// </smpl>

Signed-off-by: Julia Lawall <julia.law...@lip6.fr>

---
 arch/powerpc/platforms/pseries/iommu.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/iommu.c 
b/arch/powerpc/platforms/pseries/iommu.c
index 33b552f..2ea6831 100644
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -575,8 +575,7 @@ static void pci_dma_bus_setup_pSeries(struct pci_bus *bus)
        while (isa_dn && isa_dn != dn)
                isa_dn = isa_dn->parent;
 
-       if (isa_dn_orig)
-               of_node_put(isa_dn_orig);
+       of_node_put(isa_dn_orig);
 
        /* Count number of direct PCI children of the PHB. */
        for (children = 0, tmp = dn->child; tmp; tmp = tmp->sibling)

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