powerpc/cell: Add missing of_node_put() in iommu.c

In cell_iommu_init_disabled(), hold the reference returned by
of_find_node_by_name() and use it to call of_node_put() for reference
balance.

Signed-off-by: Liang He <windhl@126.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220701144949.252364-2-windhl@126.com

diff --git a/arch/powerpc/platforms/cell/iommu.c b/arch/powerpc/platforms/cell/iommu.c
index 0ca3efeef293bdd58c3b42086f733ea04a4a7102..8c7133039566911365fb3548dbba1938bb8e82d2 100644 (file)
--- a/arch/powerpc/platforms/cell/iommu.c
+++ b/arch/powerpc/platforms/cell/iommu.c
@@ -720,8 +720,10 @@ static int __init cell_iommu_init_disabled(void)
        cell_disable_iommus();
 
        /* If we have no Axon, we set up the spider DMA magic offset */
-       if (of_find_node_by_name(NULL, "axon") == NULL)
+       np = of_find_node_by_name(NULL, "axon");
+       if (!np)
                cell_dma_nommu_offset = SPIDER_DMA_OFFSET;
+       of_node_put(np);
 
        /* Now we need to check to see where the memory is mapped
         * in PCI space. We assume that all busses use the same dma