linux-kernel - [PATCH] OPP: Check for invalid OPP in dev_pm_opp_find_level

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Message-Id: <51b7d5dec3d4f3a677b355b12fac9dcac63828cf.1701155328.git.viresh.kumar@linaro.org>
Date:   Tue, 28 Nov 2023 12:39:06 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
        Stephen Boyd <sboyd@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Viresh Kumar <viresh.kumar@...aro.org>, linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Dan Carpenter <dan.carpenter@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] OPP: Check for invalid OPP in dev_pm_opp_find_level_ceil()

_find_key_ceil() may return an error and that must be checked before
passing the same to dev_pm_opp_put().

Fixes: 41907aa4ae37 ("OPP: Level zero is valid")
Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
 drivers/opp/core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 4f1ca84d9ed0..c022d548067d 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -808,6 +808,8 @@ struct dev_pm_opp *dev_pm_opp_find_level_ceil(struct device *dev,
 	struct dev_pm_opp *opp;
 
 	opp = _find_key_ceil(dev, &temp, 0, true, _read_level, NULL);
+	if (IS_ERR(opp))
+		return opp;
 
 	/* False match */
 	if (temp == OPP_LEVEL_UNSET) {
-- 
2.31.1.272.g89b43f80a514