check: do not create fallback device when other requirements are not met

Currently, fallback devices are prepared regardless of whether other
requirements are fulfilled. This is not always desired. For example,
when users already created scsi_debug devices, it is not good to create
a fallback scsi_debug device, because it unloads scsi_debug module and
remove the scsi_debug devices users created. To prevent such scenario,
confirm requirements by checking skip reasons before creating fallback
devices.

Signed-off-by: Shin'ichiro Kawasaki <[email protected]>

Author: kawasaki

check

@@ -721,6 +721,11 @@ _check_and_call_test_device() {
 	[[ -n $COND_DESC ]] && postfix=_${COND_DESC//[ =]/_}
 	for TEST_DEV in "${TEST_DEVS[@]}"; do
 		if [[ $TEST_DEV == fallback ]]; then
+			if [[ -v SKIP_REASONS ]]; then
+				_output_notrun "$TEST_NAME"
+				return 0
+			fi
+
 			if ! TEST_DEV=$(fallback_device); then
 				_warning "$TEST_NAME: fallback_device call failure"
 				return 0