[PATCH V2] tty: hvc: hvc_opal: eliminate uses of of_node_put()

[Lu Dai]

Make use of the __free() cleanup handler to automatically free nodes
when they get out of scope.

Remove the need for a 'goto' as an effect.

Signed-off-by: Lu Dai <dai...@exordes.com>
---
Changes since v1:
Move the assignment of 'opal' to its declaration
Seperate the declaration of 'np'

 drivers/tty/hvc/hvc_opal.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c
index 095c33ad10f8..c17e8343ea60 100644
--- a/drivers/tty/hvc/hvc_opal.c
+++ b/drivers/tty/hvc/hvc_opal.c
@@ -327,19 +327,18 @@ static void udbg_init_opal_common(void)
 
 void __init hvc_opal_init_early(void)
 {
-       struct device_node *stdout_node = of_node_get(of_stdout);
+       struct device_node *stdout_node __free(device_node) = 
of_node_get(of_stdout);
        const __be32 *termno;
        const struct hv_ops *ops;
        u32 index;
 
        /* If the console wasn't in /chosen, try /ibm,opal */
        if (!stdout_node) {
-               struct device_node *opal, *np;
-
                /* Current OPAL takeover doesn't provide the stdout
                 * path, so we hard wire it
                 */
-               opal = of_find_node_by_path("/ibm,opal/consoles");
+               struct device_node *opal __free(device_node) =
+                       of_find_node_by_path("/ibm,opal/consoles");
                if (opal) {
                        pr_devel("hvc_opal: Found consoles in new location\n");
                } else {
@@ -350,13 +349,13 @@ void __init hvc_opal_init_early(void)
                }
                if (!opal)
                        return;
+               struct device_node *np;
                for_each_child_of_node(opal, np) {
                        if (of_node_name_eq(np, "serial")) {
                                stdout_node = np;
                                break;
                        }
                }
-               of_node_put(opal);
        }
        if (!stdout_node)
                return;
@@ -382,13 +381,11 @@ void __init hvc_opal_init_early(void)
                hvsilib_establish(&hvc_opal_boot_priv.hvsi);
                pr_devel("hvc_opal: Found HVSI console\n");
        } else
-               goto out;
+               return;
        hvc_opal_boot_termno = index;
        udbg_init_opal_common();
        add_preferred_console("hvc", index, NULL);
        hvc_instantiate(index, index, ops);
-out:
-       of_node_put(stdout_node);
 }
 
 #ifdef CONFIG_PPC_EARLY_DEBUG_OPAL_RAW
-- 
2.39.2