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

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Message-Id: <20200520080617.23801-1-dinghao.liu@zju.edu.cn>
Date:   Wed, 20 May 2020 16:06:09 +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>,
        Eric Biggers <ebiggers@...gle.com>,
        kbuild test robot <lkp@...el.com>,
        linux-crypto@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] crypto: sun8i-ss - 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-ss/sun8i-ss-cipher.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
index 84d52fc3a2da..b1c766bf4483 100644
--- a/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
+++ b/drivers/crypto/allwinner/sun8i-ss/sun8i-ss-cipher.c
@@ -359,6 +359,7 @@ int sun8i_ss_cipher_init(struct crypto_tfm *tfm)
 
 	return 0;
 error_pm:
+	pm_runtime_put_sync(op->ss->dev);
 	crypto_free_sync_skcipher(op->fallback_tfm);
 	return err;
 }
-- 
2.17.1