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Thu, 22 Apr 2021 10:41:44 +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 v2] hwrng: exynos - Fix runtime PM imbalance on error Date: Thu, 22 Apr 2021 12:41:41 +0200 Message-Id: <20210422104141.17668-1-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+NgFlrEKsWRmVeSWpSXmKPExsWy7djP87ovgxoTDJ7+sLTYOGM9q0X3KxmL jW9/MFncPLSC0WLT42usFvfv/WSyuLxrDpvFjPP7mCzWHrnLbrFgWx+jA5fHrIZeNo9tB1Q9 Ni+p9+jbsorRo+/lBkaPz5vkAtiiuGxSUnMyy1KL9O0SuDLuXs8paOSuWNDynLmBcQpnFyMn h4SAicScJQ/Zuhi5OIQEVjBKnDl0mQnC+cIo8engHVYI5zOjxJb/s1lgWjouTWCHSCxnlHh7 cQtU/3NGiSs7HrCDVLEJOEr0Lz0B1i4iMIlJYuW8H4wgDrPAPkaJnfemMINUCQu4SrRPvsAE YrMIqEqc3nYRrJtXwFriYddsVoh98hLty7ezQcQFJU7OfAJ2B7+AlsSaputgNjNQTfPW2cwQ 9Xc4JBY984ewXSR2Letig7CFJV4d38IOYctInJ7cA9TLAWTXS0yeZAZym4RAD6PEtjk/oP60 lrhz7hcbSA2zgKbE+l36EGFHiddLvzNBtPJJ3HgrCHEBn8SkbdOZIcK8Eh1tQhDVKhLr+vdA DZSS6H21ghHC9pB4fLWdaQKj4iwkf81C8ssshL0LGJlXMYqnlhbnpqcWG+WllusVJ+YWl+al 6yXn525iBCaj0/+Of9nBuPzVR71DjEwcjIcYJTiYlUR41xY3JAjxpiRWVqUW5ccXleakFh9i lOZgURLnTdqyJl5IID2xJDU7NbUgtQgmy8TBKdXApHSt4l2IkOnTVQ4NPR/a80rvWX50VEmr 3n7o/fN4zz8eUxIVNulMu37VVjN1nZp0/rQtQocXmR10W7LsQw2/rNEDGe9rGpda33uxvy1t Y2vc6GIza47Zo8Sel2ntB/j5/ZgZ90sWit/9P9+5qa0z3mWJi5zLqodmPP2/9iUsypVOqqt3 fbX8rMW+yGZ3nl1vVMSfuN3Z7LPX2vdO2rnCJVduFB+2FHfczuzxT+XYhoIk99iM6YYtyUeu 3v9R+3q19Zyg6EueOZW30/6tniGenC+yMZMv2SFD+k5r+Im5hZXaBR8fSUZHi9x9w5fV/KzP J0wzqPaRX3Lu6reLd4ZPybEJaHgtnST3w3aS4mMlluKMREMt5qLiRABYsBrVtQMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprNIsWRmVeSWpSXmKPExsVy+t/xu7ovgxoTDK7947DYOGM9q0X3KxmL jW9/MFncPLSC0WLT42usFvfv/WSyuLxrDpvFjPP7mCzWHrnLbrFgWx+jA5fHrIZeNo9tB1Q9 Ni+p9+jbsorRo+/lBkaPz5vkAtii9GyK8ktLUhUy8otLbJWiDS2M9AwtLfSMTCz1DI3NY62M TJX07WxSUnMyy1KL9O0S9DLuXs8paOSuWNDynLmBcQpnFyMnh4SAiUTHpQnsXYxcHEICSxkl tr4+xtrFyAGUkJJYOTcdokZY4s+1LjaImqeMEhO/3mAGSbAJOEr0Lz3BCpIQEZjGJHF22Skw h1lgH6PE/qOL2UGqhAVcJdonX2ACsVkEVCVOb7sIFucVsJZ42DWbFWKFvET78u1sEHFBiZMz n7CAXMEsoC6xfp4QSJhfQEtiTdN1FhCbGai8eets5gmMArOQdMxC6JiFpGoBI/MqRpHU0uLc 9NxiQ73ixNzi0rx0veT83E2MwFjaduzn5h2M81591DvEyMTBeIhRgoNZSYR3bXFDghBvSmJl VWpRfnxRaU5q8SFGU6APJjJLiSbnA6M5ryTe0MzA1NDEzNLA1NLMWEmcd+vcNfFCAumJJanZ qakFqUUwfUwcnFINTEGX1WxUw5uWBLw72ejAyeX2ddOpu4375As9HzL6/dgVvtZ5qdXiz+08 k7JE7nQqf8rPsy+evX65bHTY+pSmuPqQ5XMDV/J/ZNj1xlzqpSKnutmNp0dufnJTkQzd8EKg 1WuBz+nJvIufsLWK7vSS73jHUi/MzeN5zpI1f+nSRNcgnc6MUFMr/+XNepddjnQ6/V3U3zQ9 U21bT1bQ5mCmjAzbK3/ZVk4PPzEptvnkj4DHH92M7qZM+2lmPedp8/WeV5494RN5Z/U2+nHH rG0ulPiSs91cTHi+wUfGV6dPXYrtn57scPUf7+rAxO+enjks39bwntBWiFX+PIlr4tyWJlf+ pRuK/VS5vUWLf59SYinOSDTUYi4qTgQARow6/i4DAAA= X-CMS-MailID: 20210422104145eucas1p17f46c95b72f3568761a9f7911bf072e1 X-Msg-Generator: CA X-RootMTR: 20210422104145eucas1p17f46c95b72f3568761a9f7911bf072e1 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20210422104145eucas1p17f46c95b72f3568761a9f7911bf072e1 References: Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@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. Signed-off-by: Łukasz Stelmach --- 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;