selftests: firmware: return Kselftest Skip code for skipped tests

When firmware test(s) get skipped because of unmet dependencies and/or
unsupported configuration, it returns 0 which is treated as a pass
by the Kselftest framework. This leads to false positive result even
when the test could not be run.

Change it to return kselftest skip code when a test gets skipped to
clearly report that the test could not be run.

Kselftest framework SKIP code is 4 and the framework prints appropriate
messages to indicate that the test is skipped.

Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Reviewed-by: Luis R. Rodriguez <mcgrof@kernel.org>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>

tools/testing/selftests/firmware/fw_fallback.sh

@@ -74,7 +74,7 @@ load_fw_custom()
 {
 	if [ ! -e "$DIR"/trigger_custom_fallback ]; then
 		echo "$0: custom fallback trigger not present, ignoring test" >&2
-		return 1
+		exit $ksft_skip
 	fi
 
 	local name="$1"
@@ -107,7 +107,7 @@ load_fw_custom_cancel()
 {
 	if [ ! -e "$DIR"/trigger_custom_fallback ]; then
 		echo "$0: canceling custom fallback trigger not present, ignoring test" >&2
-		return 1
+		exit $ksft_skip
 	fi
 
 	local name="$1"

tools/testing/selftests/firmware/fw_filesystem.sh

@@ -30,6 +30,7 @@ fi
 
 if [ ! -e "$DIR"/trigger_async_request ]; then
 	echo "$0: empty filename: async trigger not present, ignoring test" >&2
+	exit $ksft_skip
 else
 	if printf '\000' >"$DIR"/trigger_async_request 2> /dev/null; then
 		echo "$0: empty filename should not succeed (async)" >&2
@@ -69,6 +70,7 @@ fi
 # Try the asynchronous version too
 if [ ! -e "$DIR"/trigger_async_request ]; then
 	echo "$0: firmware loading: async trigger not present, ignoring test" >&2
+	exit $ksft_skip
 else
 	if ! echo -n "$NAME" >"$DIR"/trigger_async_request ; then
 		echo "$0: could not trigger async request" >&2
@@ -89,7 +91,7 @@ test_config_present()
 {
 	if [ ! -f $DIR/reset ]; then
 		echo "Configuration triggers not present, ignoring test"
-		exit 0
+		exit $ksft_skip
 	fi
 }
 

tools/testing/selftests/firmware/fw_lib.sh

@@ -9,11 +9,14 @@ DIR=/sys/devices/virtual/misc/test_firmware
 PROC_CONFIG="/proc/config.gz"
 TEST_DIR=$(dirname $0)
 
+# Kselftest framework requirement - SKIP code is 4.
+ksft_skip=4
+
 print_reqs_exit()
 {
 	echo "You must have the following enabled in your kernel:" >&2
 	cat $TEST_DIR/config >&2
-	exit 1
+	exit $ksft_skip
 }
 
 test_modprobe()
@@ -88,7 +91,7 @@ verify_reqs()
 	if [ "$TEST_REQS_FW_SYSFS_FALLBACK" = "yes" ]; then
 		if [ ! "$HAS_FW_LOADER_USER_HELPER" = "yes" ]; then
 			echo "usermode helper disabled so ignoring test"
-			exit 0
+			exit $ksft_skip
 		fi
 	fi
 }