linux-kernel - [PATCH 5.4 036/108] clk: core: Fix runtime PM sequence in clk_core

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Message-Id: <20220913140355.200481383@linuxfoundation.org>
Date:   Tue, 13 Sep 2022 16:06:07 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Chen-Yu Tsai <wenst@...omium.org>,
        "=?UTF-8?q?N=C3=ADcolas=20F . =20R . =20A . =20Prado?=" 
        <nfraprado@...labora.com>, Stephen Boyd <sboyd@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 036/108] clk: core: Fix runtime PM sequence in clk_core_unprepare()

From: Chen-Yu Tsai <wenst@...omium.org>

[ Upstream commit 4b592061f7b3971c70e8b72fc42aaead47c24701 ]

In the original commit 9a34b45397e5 ("clk: Add support for runtime PM"),
the commit message mentioned that pm_runtime_put_sync() would be done
at the end of clk_core_unprepare(). This mirrors the operations in
clk_core_prepare() in the opposite order.

However, the actual code that was added wasn't in the order the commit
message described. Move clk_pm_runtime_put() to the end of
clk_core_unprepare() so that it is in the correct order.

Fixes: 9a34b45397e5 ("clk: Add support for runtime PM")
Signed-off-by: Chen-Yu Tsai <wenst@...omium.org>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Link: https://lore.kernel.org/r/20220822081424.1310926-3-wenst@chromium.org
Signed-off-by: Stephen Boyd <sboyd@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/clk/clk.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 13332f89e034b..c002f83adf573 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -852,10 +852,9 @@ static void clk_core_unprepare(struct clk_core *core)
 	if (core->ops->unprepare)
 		core->ops->unprepare(core->hw);
 
-	clk_pm_runtime_put(core);
-
 	trace_clk_unprepare_complete(core);
 	clk_core_unprepare(core->parent);
+	clk_pm_runtime_put(core);
 }
 
 static void clk_core_unprepare_lock(struct clk_core *core)
-- 
2.35.1