[PATCH v2] commands: saveenv: mention where environment is saved to

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

We already mention it on loadenv, but it makes sense to do it on saveenv
too to assist with debugging.

As this removes the only user of envfs_save that passes a NULL as first
argument, disallow that going forward by returning an error.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
v1 -> v2:
  - remove NULL check for default_environment_path_get() (Sascha)
  - remove default_environment_path_get() fallback from envfs_save
    (Sascha)

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 commands/saveenv.c   | 7 +++++--
 common/environment.c | 5 ++---
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/commands/saveenv.c b/commands/saveenv.c
index 203729efbb1a..ae9e8da9ce2b 100644
--- a/commands/saveenv.c
+++ b/commands/saveenv.c
@@ -13,9 +13,8 @@ static int do_saveenv(int argc, char *argv[])
 {
 	int ret, opt;
 	unsigned envfs_flags = 0;
-	char *filename = NULL, *dirname = NULL;
+	const char *filename = NULL, *dirname = NULL;
 
-	printf("saving environment\n");
 	while ((opt = getopt(argc, argv, "z")) > 0) {
 		switch (opt) {
 		case 'z':
@@ -33,6 +32,10 @@ static int do_saveenv(int argc, char *argv[])
 	/* destination only given? */
 	if (argc - optind > 0)
 		filename = argv[optind];
+	if (!filename)
+		filename = default_environment_path_get();
+
+	printf("saving environment to %s\n", filename);
 
 	ret = envfs_save(filename, dirname, envfs_flags);
 
diff --git a/common/environment.c b/common/environment.c
index 37adb5d67870..33ab4c43295d 100644
--- a/common/environment.c
+++ b/common/environment.c
@@ -307,10 +307,8 @@ int envfs_save(const char *filename, const char *dirname, unsigned flags)
 	struct action_data data = {};
 	void *buf = NULL, *wbuf;
 	struct envfs_entry *env;
-	const char *defenv_path = default_environment_path_get();
+	__maybe_unused const char *defenv_path;
 
-	if (!filename)
-		filename = defenv_path;
 	if (!filename)
 		return -ENOENT;
 
@@ -419,6 +417,7 @@ int envfs_save(const char *filename, const char *dirname, unsigned flags)
 	ret = 0;
 
 #ifdef CONFIG_NVVAR
+	defenv_path = default_environment_path_get();
 	if (defenv_path && !strcmp(filename, defenv_path))
 	    nv_var_set_clean();
 #endif
-- 
2.39.5