of: unittest: fix an error code in of_unittest_apply_overlay()

We accidentally return zero on failure instead of a negative error code.

Fixes: 39a751a4cb7e ("of: change overlay apply input data from unflattened to FDT")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Rob Herring <robh@kernel.org>

1 files changed, 2 insertions, 4 deletions

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index a08c9e2d5c4c..02c5984ab09b 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1423,15 +1423,13 @@ static int __init of_unittest_apply_overlay(int overlay_nr, int unittest_nr,
                 int *overlay_id)
 {
         const char *overlay_name;
-        int ret;
 
         overlay_name = overlay_name_from_nr(overlay_nr);
 
-        ret = overlay_data_apply(overlay_name, overlay_id);
-        if (!ret) {
+        if (!overlay_data_apply(overlay_name, overlay_id)) {
                 unittest(0, "could not apply overlay \"%s\"\n",
                                 overlay_name);
-                return ret;
+                return -EFAULT;
         }
         of_unittest_track_overlay(*overlay_id);