remoteproc: rcar_rproc: Call of_node_put() on iteration error

commit f8bae63 upstream.

Function of_phandle_iterator_next() calls of_node_put() on the last
device_node it iterated over, but when the loop exits prematurely it has
to be called explicitly.

Fixes: 285892a ("remoteproc: Add Renesas rcar driver")
Cc: stable@vger.kernel.org
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20230320221826.2728078-4-mathieu.poirier@linaro.org
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/remoteproc/rcar_rproc.c

@@ -62,13 +62,16 @@ static int rcar_rproc_prepare(struct rproc *rproc)
 
 		rmem = of_reserved_mem_lookup(it.node);
 		if (!rmem) {
+			of_node_put(it.node);
 			dev_err(&rproc->dev,
 				"unable to acquire memory-region\n");
 			return -EINVAL;
 		}
 
-		if (rmem->base > U32_MAX)
+		if (rmem->base > U32_MAX) {
+			of_node_put(it.node);
 			return -EINVAL;
+		}
 
 		/* No need to translate pa to da, R-Car use same map */
 		da = rmem->base;
@@ -79,8 +82,10 @@ static int rcar_rproc_prepare(struct rproc *rproc)
 					   rcar_rproc_mem_release,
 					   it.node->name);
 
-		if (!mem)
+		if (!mem) {
+			of_node_put(it.node);
 			return -ENOMEM;
+		}
 
 		rproc_add_carveout(rproc, mem);
 	}