[PATCH 4/4] cmd: mvebu/bubt: Fix cmd main return value on error

["Pali Rohár" <pali@kernel.org>]

Negative return value from cmd main function cause U-Boot to print criplic
error message: exit not allowed from main input shell.

Set return value on error to 1.

Signed-off-by: Pali Rohár <pali@kernel.org>
---
 cmd/mvebu/bubt.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/cmd/mvebu/bubt.c b/cmd/mvebu/bubt.c
index 276069a0efc2..ffa05bc20181 100644
--- a/cmd/mvebu/bubt.c
+++ b/cmd/mvebu/bubt.c
@@ -870,11 +870,11 @@ int do_bubt_cmd(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 	dst = find_bubt_dev(dst_dev_name);
 	if (!dst) {
 		printf("Error: Unknown destination \"%s\"\n", dst_dev_name);
-		return -EINVAL;
+		return 1;
 	}
 
 	if (!bubt_is_dev_active(dst))
-		return -ENODEV;
+		return 1;
 
 	/* Figure out the source device */
 	src = find_bubt_dev(src_dev_name);
@@ -891,15 +891,15 @@ int do_bubt_cmd(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
 
 	image_size = bubt_read_file(src);
 	if (!image_size)
-		return -EIO;
+		return 1;
 
 	err = bubt_verify(dst);
 	if (err)
-		return err;
+		return 1;
 
 	err = bubt_write_file(dst, image_size);
 	if (err)
-		return err;
+		return 1;
 
 	return 0;
 }
-- 
2.20.1