[PATCH 1/3] dm ioctl: fix error return code in target_message

[Qinglang Miao]

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 2ca4c92f58f9 ("dm ioctl: prevent empty message")
Reported-by: Hulk Robot <hul...@huawei.com>
Signed-off-by: Qinglang Miao <miaoqingl...@huawei.com>
---
 drivers/md/dm-ioctl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index cd0478d44..5e306bba4 100644
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1600,6 +1600,7 @@ static int target_message(struct file *filp, struct 
dm_ioctl *param, size_t para
 
        if (!argc) {
                DMWARN("Empty message received.");
+               r = -EINVAL;
                goto out_argv;
        }
 
-- 
2.23.0