linux-kernel - [PATCH] of: unittest: fix an error code in of_unittest_apply

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Date:   Wed, 14 Mar 2018 23:08:28 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] 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@...cle.com>

diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index dede77a79820..bc03902693b7 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -1417,15 +1417,13 @@ 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);