[PATCH] tools: env: return error if ubi_update_start() fails

[Martin Hundebøll]

The UBI_IOCVOLUP ioctl can fail if exclusive access to the volume isn't
obtained. If this happens, the flush operation doesn't return error,
leaving the caller without knowledge of missing flush.

Fix this by forwarding the error (-1) from ubi_update_start().

Fixes: 34255b92e6e ("tools: env: Add support for direct read/write UBI volumes")
Signed-off-by: Martin Hundebøll <martin at geanix.com>
---
 tools/env/fw_env.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/env/fw_env.c b/tools/env/fw_env.c
index 66cb9d2a25..2a61a5d6f0 100644
--- a/tools/env/fw_env.c
+++ b/tools/env/fw_env.c
@@ -1208,7 +1208,7 @@ static int flash_write(int fd_current, int fd_target, int dev_target)
 
 	if (IS_UBI(dev_target)) {
 		if (ubi_update_start(fd_target, CUR_ENVSIZE) < 0)
-			return 0;
+			return -1;
 		return ubi_write(fd_target, environment.image, CUR_ENVSIZE);
 	}
 
-- 
2.28.0