[PATCH blktests] check: add zoned sysfs node checking in _test_dev_is_zoned

[Yi Zhang]

Some kernel may not have zoned sysfs node, e.g. RHEL7, checking if
it exists first in _test_dev_is_zoned.

Signed-off-by: Yi Zhang <yi.zh...@redhat.com>
---
 check | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/check b/check
index f0ca382..459104d 100755
--- a/check
+++ b/check
@@ -405,7 +405,7 @@ _call_test() {
 }
 
 _test_dev_is_zoned() {
-       if grep -qe "none" "${TEST_DEV_SYSFS}/queue/zoned" ; then
+       if [[ ! -f "${TEST_DEV_SYSFS}/queue/zoned" ]] || grep -qe "none" 
"${TEST_DEV_SYSFS}/queue/zoned" ; then
                SKIP_REASON="${TEST_DEV} is not a zoned block device"
                return 1
        fi
-- 
2.17.1