scsi: core: Add passthrough tests for success and no failure definitions

This patch adds scsi_check_passthrough() tests for the cases where a
command completes successfully and when the command failed but the caller
did not pass in a list of failures.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Link: https://lore.kernel.org/r/20250113180757.16691-1-michael.christie@oracle.com
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: mikechristie

drivers/scsi/scsi_lib_test.c

@@ -67,6 +67,13 @@ static void scsi_lib_test_multiple_sense(struct kunit *test)
 	};
 	int i;
 
+	/* Success */
+	sc.result = 0;
+	KUNIT_EXPECT_EQ(test, 0, scsi_check_passthrough(&sc, &failures));
+	KUNIT_EXPECT_EQ(test, 0, scsi_check_passthrough(&sc, NULL));
+	/* Command failed but caller did not pass in a failures array */
+	scsi_build_sense(&sc, 0, ILLEGAL_REQUEST, 0x91, 0x36);
+	KUNIT_EXPECT_EQ(test, 0, scsi_check_passthrough(&sc, NULL));
 	/* Match end of array */
 	scsi_build_sense(&sc, 0, ILLEGAL_REQUEST, 0x91, 0x36);
 	KUNIT_EXPECT_EQ(test, -EAGAIN, scsi_check_passthrough(&sc, &failures));