linux-kernel - [PATCH] crypto: sa2ul - fix reference leak in sa_ul

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Message-ID: <20201127094427.120635-1-miaoqinglang@huawei.com>
Date:   Fri, 27 Nov 2020 17:44:27 +0800
From:   Qinglang Miao <miaoqinglang@...wei.com>
To:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>
CC:     <linux-crypto@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Qinglang Miao" <miaoqinglang@...wei.com>
Subject: [PATCH] crypto: sa2ul - fix reference leak in sa_ul_probe()

pm_runtime_get_sync will increment pm usage counter even it
failed. Forgetting to putting operation will result in a
reference leak here.

A new function pm_runtime_resume_and_get is introduced in
[0] to keep usage counter balanced. So We fix the reference
leak by replacing it with new funtion.

[0] dd8088d5a896 ("PM: runtime: Add  pm_runtime_resume_and_get to deal with usage counter")

Fixes: 7694b6ca649f ("crypto: sa2ul - Add crypto driver")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Qinglang Miao <miaoqinglang@...wei.com>
---
 drivers/crypto/sa2ul.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/sa2ul.c b/drivers/crypto/sa2ul.c
index eda93fab9..39d56ab12 100644
--- a/drivers/crypto/sa2ul.c
+++ b/drivers/crypto/sa2ul.c
@@ -2345,7 +2345,7 @@ static int sa_ul_probe(struct platform_device *pdev)
 	dev_set_drvdata(sa_k3_dev, dev_data);
 
 	pm_runtime_enable(dev);
-	ret = pm_runtime_get_sync(dev);
+	ret = pm_runtime_resume_and_get(dev);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "%s: failed to get sync: %d\n", __func__,
 			ret);
-- 
2.23.0