linux-kernel - [PATCH] crypto: sun8i-ce - fix runtime pm imbalance on error

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Date:   Wed, 20 May 2020 15:54:49 +0800
From:   Dinghao Liu <dinghao.liu@....edu.cn>
To:     dinghao.liu@....edu.cn, kjlu@....edu
Cc:     Corentin Labbe <clabbe.montjoie@...il.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Chen Zhou <chenzhou10@...wei.com>,
        Colin Ian King <colin.king@...onical.com>,
        linux-crypto@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: sun8i-ce - fix runtime pm imbalance on error

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@....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