nvme/rc: fix rdma driver check

Since the commit 4824ac3 ("Skip tests based on SKIP_REASON, not
return value"), blktests no longer checks return values of _have_foo
helpers. Instead, it checks if _have_foo helpers set SKIP_REASON, which
was renamed to SKIP_REASONS later, to judge test case skip. If two
_have_foo helpers are chained with ||, the skip check does not work as
expected since one of the helper may set SKIP_REASONS even when the
other does not set. Such chain with || is done in _nvme_requires() to
check rdma drivers.

To fix the check, do not chain the helper functions with || operator.
Instead, refer $use_rxe to call only the required function.

Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>

tests/nvme/rc

@@ -44,7 +44,11 @@ _nvme_requires() {
 		_have_driver nvmet-rdma
 		_have_configfs
 		_have_program rdma
-		_have_driver rdma_rxe || _have_driver siw
+		if [ -n "$use_rxe" ]; then
+			_have_driver rdma_rxe
+		else
+			_have_driver siw
+		fi
 		;;
 	fc)
 		_have_driver nvme-fc