[PATCH 1/4] hw/arm: use g_autofree for filename in arm_load_dtb

["Alex Bennée" <alex.bennee@linaro.org>]

The function has quite a number of exit cases so lets try and clean
things up with g_autofree. As the fdt hasn't be allocated yet we can
return directly from the fail point.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
 hw/arm/boot.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/hw/arm/boot.c b/hw/arm/boot.c
index d391cd01bb1..56fd13b9f7c 100644
--- a/hw/arm/boot.c
+++ b/hw/arm/boot.c
@@ -528,20 +528,18 @@ int arm_load_dtb(hwaddr addr, const struct arm_boot_info *binfo,
     Error *err = NULL;
 
     if (binfo->dtb_filename) {
-        char *filename;
-        filename = qemu_find_file(QEMU_FILE_TYPE_DTB, binfo->dtb_filename);
+        g_autofree char *filename = qemu_find_file(QEMU_FILE_TYPE_DTB,
+                                                   binfo->dtb_filename);
         if (!filename) {
             fprintf(stderr, "Couldn't open dtb file %s\n", binfo->dtb_filename);
-            goto fail;
+            return -1;
         }
 
         fdt = load_device_tree(filename, &size);
         if (!fdt) {
             fprintf(stderr, "Couldn't open dtb file %s\n", filename);
-            g_free(filename);
             goto fail;
         }
-        g_free(filename);
     } else {
         fdt = binfo->get_dtb(binfo, &size);
         if (!fdt) {
-- 
2.47.2