powerpc/pseries: delete unneeded test before of_node_put

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.Lawall@lip6.fr>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 49bcf7c..1cc3db9 100644 (file)
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -574,8 +574,7 @@ 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)