tests: ceph-helpers.sh use expr instead of (( ))

Because (( timer++ )) is mistaken by set -e to not be a successful
command, use expr instead.

Signed-off-by: Loic Dachary <ldachary@redhat.com>

diff --git a/qa/workunits/ceph-helpers.sh b/qa/workunits/ceph-helpers.sh
index 4adb51550a2f1613695e0db1346c738d15d5dec8..ad04abe733a400aa8f1f2e072a159100dafa0ec2 100755 (executable)
--- a/qa/workunits/ceph-helpers.sh
+++ b/qa/workunits/ceph-helpers.sh
@@ -990,7 +990,7 @@ function wait_for_clean() {
             num_active_clean=$cur_active_clean
         fi
         sleep 1
-        (( timer++ ))
+        timer=$(expr $timer + 1)
     done
     return 0
 }