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From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: "Łukasz Stelmach" <l.stelmach@samsung.com>,
	"Matt Mackall" <mpm@selenic.com>,
	"Herbert Xu" <herbert@gondor.apana.org.au>,
	"Arnd Bergmann" <arnd@arndb.de>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Kukjin Kim" <kgene@kernel.org>,
	"Krzysztof Kozlowski" <krzk@kernel.org>,
	linux-samsung-soc@vger.kernel.org, linux-crypto@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] hwrng: exynos - fix runtime pm imbalance on error
Date: Wed, 20 May 2020 21:19:10 +0800	[thread overview]
Message-ID: <20200520131911.16813-1-dinghao.liu@zju.edu.cn> (raw)

pm_runtime_get_sync() increments the runtime PM usage counter even
the call 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/char/hw_random/exynos-trng.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/char/hw_random/exynos-trng.c b/drivers/char/hw_random/exynos-trng.c
index 8e1fe3f8dd2d..133e017db577 100644
--- a/drivers/char/hw_random/exynos-trng.c
+++ b/drivers/char/hw_random/exynos-trng.c
@@ -165,9 +165,8 @@ static int exynos_trng_probe(struct platform_device *pdev)
 	clk_disable_unprepare(trng->clk);
 
 err_clock:
-	pm_runtime_put_sync(&pdev->dev);
-
 err_pm_get:
+	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 
 	return ret;
-- 
2.17.1


WARNING: multiple messages have this Message-ID
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
To: dinghao.liu@zju.edu.cn, kjlu@umn.edu
Cc: linux-samsung-soc@vger.kernel.org,
	"Herbert Xu" <herbert@gondor.apana.org.au>,
	"Arnd Bergmann" <arnd@arndb.de>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Łukasz Stelmach" <l.stelmach@samsung.com>,
	linux-kernel@vger.kernel.org,
	"Krzysztof Kozlowski" <krzk@kernel.org>,
	"Kukjin Kim" <kgene@kernel.org>,
	linux-crypto@vger.kernel.org, "Matt Mackall" <mpm@selenic.com>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH] hwrng: exynos - fix runtime pm imbalance on error
Date: Wed, 20 May 2020 21:19:10 +0800	[thread overview]
Message-ID: <20200520131911.16813-1-dinghao.liu@zju.edu.cn> (raw)

pm_runtime_get_sync() increments the runtime PM usage counter even
the call 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/char/hw_random/exynos-trng.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/char/hw_random/exynos-trng.c b/drivers/char/hw_random/exynos-trng.c
index 8e1fe3f8dd2d..133e017db577 100644
--- a/drivers/char/hw_random/exynos-trng.c
+++ b/drivers/char/hw_random/exynos-trng.c
@@ -165,9 +165,8 @@ static int exynos_trng_probe(struct platform_device *pdev)
 	clk_disable_unprepare(trng->clk);
 
 err_clock:
-	pm_runtime_put_sync(&pdev->dev);
-
 err_pm_get:
+	pm_runtime_put_sync(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
 
 	return ret;
-- 
2.17.1


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             reply	other threads:[~2020-05-20 13:19 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-20 13:19 Dinghao Liu [this message]
2020-05-20 13:19 ` Dinghao Liu
     [not found] ` <CGME20200521135309eucas1p1c0734570f04660c8b60ea12531f53e60@eucas1p1.samsung.com>
2020-05-21 13:52   ` Lukasz Stelmach
2020-05-21 13:52     ` Lukasz Stelmach
     [not found] <CGME20210422101724eucas1p13e2f002b63fe94ef2aa5268383f3a207@eucas1p1.samsung.com>
2021-04-22 10:17 ` [PATCH] hwrng: exynos - Fix runtime PM " Łukasz Stelmach
2021-04-22 10:17   ` Łukasz Stelmach

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