From: "Łukasz Stelmach" <l.stelmach@samsung.com>
To: Matt Mackall <mpm@selenic.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
linux-samsung-soc@vger.kernel.org, linux-crypto@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Cc: "Bartłomiej Żolnierkiewicz" <b.zolnierkie@samsung.com>,
"Marek Szyprowski" <m.szyprowski@samsung.com>,
"Łukasz Stelmach" <l.stelmach@samsung.com>
Subject: [PATCH v2] hwrng: exynos - Fix runtime PM imbalance on error
Date: Thu, 22 Apr 2021 12:41:41 +0200 [thread overview]
Message-ID: <20210422104141.17668-1-l.stelmach@samsung.com> (raw)
In-Reply-To: CGME20210422104145eucas1p17f46c95b72f3568761a9f7911bf072e1@eucas1p1.samsung.com
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: Łukasz Stelmach <l.stelmach@samsung.com>
---
Changes in v2:
- removed Change-Id from the commit message
drivers/char/hw_random/exynos-trng.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/drivers/char/hw_random/exynos-trng.c b/drivers/char/hw_random/exynos-trng.c
index 8e1fe3f8dd2d..9f455d952e87 100644
--- a/drivers/char/hw_random/exynos-trng.c
+++ b/drivers/char/hw_random/exynos-trng.c
@@ -142,13 +142,13 @@ static int exynos_trng_probe(struct platform_device *pdev)
if (IS_ERR(trng->clk)) {
ret = PTR_ERR(trng->clk);
dev_err(&pdev->dev, "Could not get clock.\n");
- goto err_clock;
+ goto err_pm_get;
}
ret = clk_prepare_enable(trng->clk);
if (ret) {
dev_err(&pdev->dev, "Could not enable the clk.\n");
- goto err_clock;
+ goto err_pm_get;
}
ret = devm_hwrng_register(&pdev->dev, &trng->rng);
@@ -164,10 +164,8 @@ static int exynos_trng_probe(struct platform_device *pdev)
err_register:
clk_disable_unprepare(trng->clk);
-err_clock:
- pm_runtime_put_sync(&pdev->dev);
-
err_pm_get:
+ pm_runtime_put_noidle(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return ret;
--
2.26.2
next parent reply other threads:[~2021-04-22 10:41 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20210422104145eucas1p17f46c95b72f3568761a9f7911bf072e1@eucas1p1.samsung.com>
2021-04-22 10:41 ` Łukasz Stelmach [this message]
2021-04-22 10:46 ` [PATCH v2] hwrng: exynos - Fix runtime PM imbalance on error Krzysztof Kozlowski
2021-04-22 11:19 ` Marek Szyprowski
[not found] ` <CGME20210422112224eucas1p283ca7aeaa25ab514b9743a11e63a76e0@eucas1p2.samsung.com>
2021-04-22 11:22 ` Łukasz Stelmach
2021-04-22 16:31 ` Krzysztof Kozlowski
2020-05-22 1:16 [PATCH] [v2] " Dinghao Liu
[not found] ` <CGME20200522090736eucas1p1ad308b9b37d50d9243f0fbeeeb3eab0a@eucas1p1.samsung.com>
2020-05-22 9:07 ` Lukasz Stelmach
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