btrfs: dev-replace: add explicit check for replace result "no error"

We recast the replace return status
BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS to 0, to indicate no
error.
And since BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR should also return 0,
which is also declared as 0, so we just return. Instead add it to the if
statement so that there is enough clarity while reading the code.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index a84affa425d4b0fa1e17fa89ca2253f2534f4264..85d93bd3b27a0505dd4277fc4b07f85ae80c56a9 100644 (file)
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -539,8 +539,9 @@ int btrfs_dev_replace_by_ioctl(struct btrfs_fs_info *fs_info,
                                        args->start.cont_reading_from_srcdev_mode);
        args->result = ret;
        /* don't warn if EINPROGRESS, someone else might be running scrub */
-       if (ret == BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS)
-               ret = 0;
+       if (ret == BTRFS_IOCTL_DEV_REPLACE_RESULT_SCRUB_INPROGRESS ||
+           ret == BTRFS_IOCTL_DEV_REPLACE_RESULT_NO_ERROR)
+               return 0;
 
        return ret;
 }