linux-kernel - [PATCH 1/2] regulator: core: fix module refcount leak in set

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Message-ID: <20221201122706.4055992-2-yangyingliang@huawei.com>
Date:   Thu, 1 Dec 2022 20:27:05 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     <lgirdwood@...il.com>, <broonie@...nel.org>,
        <javier@....samsung.com>, <mirq-linux@...e.qmqm.pl>,
        <christian@...lschutter.com>
CC:     <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/2] regulator: core: fix module refcount leak in set_supply()

If create_regulator() fails in set_supply(), the module refcount
needs be put to keep refcount balanced.

Fixes: e2c09ae7a74d ("regulator: core: Increase refcount for regulator supply's module")
Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
---
 drivers/regulator/core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index bc4bba899aea..4a7d8ec415e8 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1638,10 +1638,11 @@ static int set_supply(struct regulator_dev *rdev,
 	if (!try_module_get(supply_rdev->owner))
 		return -ENODEV;
 
 	rdev->supply = create_regulator(supply_rdev, &rdev->dev, "SUPPLY");
 	if (rdev->supply == NULL) {
+		module_put(supply_rdev->owner);
 		err = -ENOMEM;
 		return err;
 	}
 	supply_rdev->open_count++;
 
-- 
2.25.1