doc: Cleanup typo

Signed-off-by: Petr Vorel <pvorel@suse.cz>
diff --git a/doc/test-writing-guidelines.txt b/doc/test-writing-guidelines.txt
index 479c24e..ed6322b 100644
--- a/doc/test-writing-guidelines.txt
+++ b/doc/test-writing-guidelines.txt
@@ -215,7 +215,7 @@
 
 1. if '$LTPROOT' is set, return '$LTPROOT/testcases/data/$TCID'
 2. else if 'tst_tmpdir()' was called return '$STARTWD/datafiles'
-   (where '$STARTWD' is initial working directory as recorded by 'tst_tmdir()')
+   (where '$STARTWD' is initial working directory as recorded by 'tst_tmpdir()')
 3. else return '$CWD/datafiles'
 
 See 'testcases/commands/file/' for example.
diff --git a/lib/tst_resource.c b/lib/tst_resource.c
index 78450df..0b9b381 100644
--- a/lib/tst_resource.c
+++ b/lib/tst_resource.c
@@ -46,7 +46,7 @@
 	int ret;
 
 	/* 1. if LTPROOT is set, use $LTPROOT/testcases/data/$TCID
-	 * 2. else if startwd is set by tst_tmdir(), use $STARWD/datafiles
+	 * 2. else if startwd is set by tst_tmpdir(), use $STARWD/datafiles
 	 * 3. else use $CWD/datafiles */
 	if (ltproot) {
 		ret = snprintf(dataroot, PATH_MAX, "%s/testcases/data/%s",