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Thu, 22 Apr 2021 10:17:23 +0000 (GMT) From: =?utf-8?q?=C5=81ukasz_Stelmach?= To: Matt Mackall , Herbert Xu , Krzysztof Kozlowski , linux-samsung-soc@vger.kernel.org, linux-crypto@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: =?utf-8?q?Bart=C5=82omiej_=C5=BBolnierkiewicz?= , Marek Szyprowski , =?utf-8?q?=C5=81ukasz_Stelmach?= Subject: [PATCH] hwrng: exynos - Fix runtime PM imbalance on error Date: Thu, 22 Apr 2021 12:17:05 +0200 Message-Id: <20210422101705.15617-1-l.stelmach@samsung.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Organization: Samsung R&D Institute Poland X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrEKsWRmVeSWpSXmKPExsWy7djPc7omvo0JBk//GVtsnLGe1aL7lYzF xrc/mCxuHlrBaLHp8TVWi/v3fjJZXN41h81ixvl9TBZrj9xlt1iwrY/RgctjVkMvm8e2A6oe m5fUe/RtWcXo0fdyA6PH501yAWxRXDYpqTmZZalF+nYJXBmL9u9jLfjGVTH93Cr2BsZpnF2M nBwSAiYS+9rXsncxcnEICaxglPhxdwcbhPOFUeLz40eMEM5nRomuV3OZYFq6Ju1igkgsZ5T4 NW02VMtzRonf558wg1SxCThK9C89wQqSEBGYxCSxct4PsFnMAvsYJXbemwJWJSzgJPH0dBuQ zcHBIqAq0XMnHcTkFbCW2DHVD2KbvET78u1sIDavgKDEyZlPWEBsfgEtiTVN18FsZqCa5q2z mUHGSwg84JC4+OwtO0Szi8Sh5l5GCFtY4tXxLVBxGYn/O+czgeySEKiXmDzJDKK3h1Fi25wf LBA11hJ3zv1iA6lhFtCUWL9LHyLsKNE0fTIjRCufxI23ghAn8ElM2jadGSLMK9HRJgRRrSKx rn8P1EApid5XK6CO8ZC4efgt0wRGxVlIHpuF5JlZCHsXMDKvYhRPLS3OTU8tNspLLdcrTswt Ls1L10vOz93ECExGp/8d/7KDcfmrj3qHGJk4GA8xSnAwK4nwri1uSBDiTUmsrEotyo8vKs1J LT7EKM3BoiTOm7RlTbyQQHpiSWp2ampBahFMlomDU6qBKf5K99Ir+fFrXdYnZdj1K/4IT1jp tj7jpaK1+527NdylH9nEjKzn/FFibN+qXn23kuVt/t4VukrKD65pr3J9G3T6X7H9ifvz93e8 uaw2m2/q5cap0w4dnBbD/9uc0/B/6KrC9bFbdx52+/A88eH57NsHRG9l3r1Ze6yu5FD/6YcB Wj/W5d68de7GnaUVB3bf0WiZuiu4Xb1hqozfsauyJ0NCCi8lexyYXjbvD8/KuBub24wD3+/N 6F0ts+g1Y0j/heRvNTU2vtbHYyp3B8/4omEZYLDf7fujOQ0XmJYudFM+w8Wte/7Vr/ViV0wr 467o3Nh6eJuDd6bN/vQnqkcl38eKvI9p+pGkNNPG8OKsuclKLMUZiYZazEXFiQA7EitGtQMA AA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprJIsWRmVeSWpSXmKPExsVy+t/xe7omvo0JBjOfM1psnLGe1aL7lYzF xrc/mCxuHlrBaLHp8TVWi/v3fjJZXN41h81ixvl9TBZrj9xlt1iwrY/RgctjVkMvm8e2A6oe m5fUe/RtWcXo0fdyA6PH501yAWxRejZF+aUlqQoZ+cUltkrRhhZGeoaWFnpGJpZ6hsbmsVZG pkr6djYpqTmZZalF+nYJehmL9u9jLfjGVTH93Cr2BsZpnF2MnBwSAiYSXZN2MXUxcnEICSxl lNjyeC9rFyMHUEJKYuXcdIgaYYk/17rYQGwhgaeMEss7REBsNgFHif6lJ1hBekUEpjFJnF12 CsxhFtjHKLH/6GJ2kCphASeJp6fbmEGGsgioSvTcSQcxeQWsJXZM9YOYLy/Rvnw72HxeAUGJ kzOfsICUMAuoS6yfJwQS5hfQkljTdJ0FxGYGKm/eOpt5AqPALCQdsxA6ZiGpWsDIvIpRJLW0 ODc9t9hQrzgxt7g0L10vOT93EyMwjrYd+7l5B+O8Vx/1DjEycTAeYpTgYFYS4V1b3JAgxJuS WFmVWpQfX1Sak1p8iNEU6P6JzFKiyfnASM4riTc0MzA1NDGzNDC1NDNWEufdOndNvJBAemJJ anZqakFqEUwfEwenVANTfxzfQqmSsqlOD9cdWvDy1RnW3jttHO5O2138s+rE+6WzXHO9ZBf/ dn+womBKvf+ZD4l2j3eFr1EVUyub+cop/eJUw7vnH7O8mnf16IoP657KpVtPYmB7eclZTX15 9Wqmr2frWH62HHx6UHmHyAam/2yhTMEmPG94Vq7rZixjlfqeUWB8ftmll6kRez9v7Wwp/r17 o9TvTZ3WTKcjRWra/WJPNxhri25Xcr5+3M/D9gqj78S1nOd2r8tW0frgIuIXcemH9Mp7Gy+n TI3tazRllVLeMqNc5Xm98B2OJL/swpJ3zwLbU6vaZ893nPDex70kIfyo9s2Ip++/iRqdfcK+ pvyW2LTOuQIpN/ZITM9WYinOSDTUYi4qTgQARlr7viwDAAA= X-CMS-MailID: 20210422101724eucas1p13e2f002b63fe94ef2aa5268383f3a207 X-Msg-Generator: CA X-RootMTR: 20210422101724eucas1p13e2f002b63fe94ef2aa5268383f3a207 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20210422101724eucas1p13e2f002b63fe94ef2aa5268383f3a207 References: Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org 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. Change-Id: I028915fbee9e4a050a1313119872d6043696632d Signed-off-by: Łukasz Stelmach --- 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;