From: Marek Behún <marek.behun@nic.cz>
Date: Wed, 3 Nov 2021 23:23:22 +0000 (+0100)
Subject: env: Fix env_get() when returning empty string using env_get_f()
X-Git-Url: http://git.dujemihanovic.xyz/img/sics.gif?a=commitdiff_plain;h=e8459c12fd2e9b4068041a931ce6da62ac648000;p=u-boot.git

env: Fix env_get() when returning empty string using env_get_f()

The env_get_f() function returns -1 on failure. Returning 0 means that
the variable exists, and is empty string.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>
---

diff --git a/env/common.c b/env/common.c
index 2aa23545ba..757c5f9ecd 100644
--- a/env/common.c
+++ b/env/common.c
@@ -125,7 +125,7 @@ char *env_get(const char *name)
 	}
 
 	/* restricted capabilities before import */
-	if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) > 0)
+	if (env_get_f(name, (char *)(gd->env_buf), sizeof(gd->env_buf)) >= 0)
 		return (char *)(gd->env_buf);
 
 	return NULL;