commit 775293e93fbc9efafa4672ba8698e427613927f6
Author: Jeff Moyer <jmoyer@redhat.com>
Date:   Mon Oct 16 15:07:38 2017 -0400

    btt_check_arenas: fix use of uninitialized variable
    
    Coverity complains that rc, passed to btt_xlat_status, may be
    used uninitialized.  Further, we could then dereference a NULL
    pointer.  Fix this.
    
    Signed-off-by: Jeff Moyer <jmoyer@redhat.com>

diff --git a/ndctl/check.c b/ndctl/check.c
index 915bb9d..93f95c6 100644
--- a/ndctl/check.c
+++ b/ndctl/check.c
@@ -582,9 +582,10 @@ static int btt_check_arenas(struct btt_chk *bttc)
 			break;
 	}
 
-	btt_xlat_status(a, rc);
-	if (rc)
+	if (a && rc != BTT_OK) {
+		btt_xlat_status(a, rc);
 		return -ENXIO;
+	}
 	return 0;
 }