linux-kernel - [PATCH] opp: Call the missing clk

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Message-Id: <0e1d9ca1766f5d95fb881f57b6c4a1ffa63d4648.1609133256.git.viresh.kumar@linaro.org>
Date:   Mon, 28 Dec 2020 10:58:21 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Stephan Gerhold <stephan@...hold.net>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>, linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Rafael Wysocki <rjw@...ysocki.net>,
        quanyang.wang@...driver.com, "v5 . 10" <stable@...r.kernel.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] opp: Call the missing clk_put() on error

Fix the clock reference counting by calling the missing clk_put() in the
error path.

Cc: v5.10 <stable@...r.kernel.org> # v5.10
Fixes: dd461cd9183f ("opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER")
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 drivers/opp/core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index c9e50836b4c2..8c905aabacc0 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1101,7 +1101,7 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
 	ret = dev_pm_opp_of_find_icc_paths(dev, opp_table);
 	if (ret) {
 		if (ret == -EPROBE_DEFER)
-			goto remove_opp_dev;
+			goto put_clk;
 
 		dev_warn(dev, "%s: Error finding interconnect paths: %d\n",
 			 __func__, ret);
@@ -1113,6 +1113,9 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
 
 	return opp_table;
 
+put_clk:
+	if (!IS_ERR(opp_table->clk))
+		clk_put(opp_table->clk);
 remove_opp_dev:
 	_remove_opp_dev(opp_dev, opp_table);
 err:
-- 
2.25.0.rc1.19.g042ed3e048af