[PATCH v2] barebox update: add note after successful update

[Stefan Christ]

Some users of the barebox_update command forget to erase the external
barebox environment after updating the barebox. Using an old barebox
environment leads to various problems if there were major changes.

So add a gentle reminder after the successful update.

Signed-off-by: Stefan Christ <s.christ at phytec.de>
---
v2: Add explanation howto to clean up the environment
---
 common/bbu.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/common/bbu.c b/common/bbu.c
index 7fb154a..d23b864 100644
--- a/common/bbu.c
+++ b/common/bbu.c
@@ -113,8 +113,15 @@ int barebox_update(struct bbu_data *data)
 	if (ret == -EINTR)
 		printf("update aborted\n");
 
-	if (!ret)
+	if (!ret) {
 		printf("update succeeded\n");
+		if (IS_ENABLED(CONFIG_ENV_HANDLING)) {
+			printf("You maybe want to erase the barebox environment now.\n");
+			printf("After booting the flashed barebox you can use\n");
+			printf("    $ saveenv -z; loadenv\n");
+			printf("to do that.\n");
+		}
+	}
 
 	return ret;
 }
-- 
1.9.1