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From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: Corentin Labbe <clabbe.montjoie@gmail.com>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	"David S. Miller" <davem@davemloft.net>,
	Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>,
	Chen Zhou <chenzhou10@huawei.com>,
	Colin Ian King <colin.king@canonical.com>,
	linux-crypto@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] crypto: sun8i-ce - fix runtime pm imbalance on error
Date: Wed, 20 May 2020 15:54:49 +0800	[thread overview]
Message-ID: <20200520075456.21670-1-dinghao.liu@zju.edu.cn> (raw)

pm_runtime_get_sync() increments the runtime PM usage counter even
it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
 drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
index 3e4e4bbda34c..18f0f251204c 100644
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
@@ -598,8 +598,10 @@ static int sun8i_ce_probe(struct platform_device *pdev)
 		goto error_alg;
 
 	err = pm_runtime_get_sync(ce->dev);
-	if (err < 0)
+	if (err < 0) {
+		pm_runtime_put_sync(ce->dev);
 		goto error_alg;
+	}
 
 	v = readl(ce->base + CE_CTR);
 	v >>= CE_DIE_ID_SHIFT;
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: Herbert Xu <herbert@gondor.apana.org.au>,
	Chen Zhou <chenzhou10@huawei.com>,
	linux-kernel@vger.kernel.org, Maxime Ripard <mripard@kernel.org>,
	Chen-Yu Tsai <wens@csie.org>,
	Corentin Labbe <clabbe.montjoie@gmail.com>,
	linux-crypto@vger.kernel.org,
	Colin Ian King <colin.king@canonical.com>,
	"David S. Miller" <davem@davemloft.net>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH] crypto: sun8i-ce - fix runtime pm imbalance on error
Date: Wed, 20 May 2020 15:54:49 +0800	[thread overview]
Message-ID: <20200520075456.21670-1-dinghao.liu@zju.edu.cn> (raw)

pm_runtime_get_sync() increments the runtime PM usage counter even
it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
---
 drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
index 3e4e4bbda34c..18f0f251204c 100644
--- a/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
+++ b/drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.c
@@ -598,8 +598,10 @@ static int sun8i_ce_probe(struct platform_device *pdev)
 		goto error_alg;
 
 	err = pm_runtime_get_sync(ce->dev);
-	if (err < 0)
+	if (err < 0) {
+		pm_runtime_put_sync(ce->dev);
 		goto error_alg;
+	}
 
 	v = readl(ce->base + CE_CTR);
 	v >>= CE_DIE_ID_SHIFT;
-- 
2.17.1


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             reply	other threads:[~2020-05-20  8:15 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-20  7:54 Dinghao Liu [this message]
2020-05-20  7:54 ` [PATCH] crypto: sun8i-ce - fix runtime pm imbalance on error Dinghao Liu

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