[PATCH 3/3] samples/damon/mtier: avoid starting DAMON before initialization

[SeongJae Park <sj@kernel.org>]

Commit 964314344eab ("samples/damon/mtier: support boot time enable
setup") is somehow incompletely applying the origin patch [1].  It is
missing the part that avoids starting DAMON before module
initialization.  Probably a mistake during a merge has happened.  Fix it
by applying the missed part again.

[1] https://lore.kernel.org/20250706193207.39810-4-sj@kernel.org

Fixes: 964314344eab ("samples/damon/mtier: support boot time enable setup")
Cc: <stable@vger.kernel.org> # 6.17-rc1
Signed-off-by: SeongJae Park <sj@kernel.org>
---
 samples/damon/mtier.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/samples/damon/mtier.c b/samples/damon/mtier.c
index 7ebd352138e4..beaf36657dea 100644
--- a/samples/damon/mtier.c
+++ b/samples/damon/mtier.c
@@ -208,6 +208,9 @@ static int damon_sample_mtier_enable_store(
 	if (enabled == is_enabled)
 		return 0;
 
+	if (!init_called)
+		return 0;
+
 	if (enabled) {
 		err = damon_sample_mtier_start();
 		if (err)
-- 
2.39.5