t/zbd: avoid looping on invalid command line options

t/zbd/test-zbd-support loops indefinitely if an unrecognized option
is specified in the command line. Add a switch case to display usage
and exit the script.

Signed-off-by: Dmitry Fomichev <dmitry.fomichev@wdc.com>
Reviewed-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/t/zbd/test-zbd-support b/t/zbd/test-zbd-support
index 05c009006f44de6d8b894eae4239a51e7032ed7b..1658dc25013be4c0714538bdd58fc2dcabeb03f8 100755 (executable)
--- a/t/zbd/test-zbd-support
+++ b/t/zbd/test-zbd-support
@@ -1178,6 +1178,7 @@ while [ "${1#-}" != "$1" ]; do
     -q) quit_on_err=1; shift;;
     -z) zbd_debug=1; shift;;
     --) shift; break;;
+     *) usage; exit 1;;
   esac
 done