powerpc/pseries/iommu: Add of_node_put() before break

Fix following coccicheck warning:

./arch/powerpc/platforms/pseries/iommu.c:924:1-28: WARNING: Function
for_each_node_with_property should have of_node_put() before break

Early exits from for_each_node_with_property should decrement the
node reference counter.

Signed-off-by: Wan Jiabing <wanjiabing@vivo.com>
Reviewed-by: Leonardo Bras <leobras.c@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211014075624.16344-1-wanjiabing@vivo.com

diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c
index 269f61d519c2cb8dc183929a1a9cfd64aa193e06..c140aa683f666f73b3d5a67a46aebdb227bc8f3c 100644 (file)
--- a/arch/powerpc/platforms/pseries/iommu.c
+++ b/arch/powerpc/platforms/pseries/iommu.c
@@ -929,8 +929,10 @@ static void find_existing_ddw_windows_named(const char *name)
                }
 
                window = ddw_list_new_entry(pdn, dma64);
-               if (!window)
+               if (!window) {
+                       of_node_put(pdn);
                        break;
+               }
 
                spin_lock(&dma_win_list_lock);
                list_add(&window->list, &dma_win_list);