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Date: Mon, 14 Mar 2016 09:07:15 +0900 From: Krzysztof Kozlowski <k.kozlowski@...sung.com> To: Matt Mackall <mpm@...enic.com>, Herbert Xu <herbert@...dor.apana.org.au>, Kukjin Kim <kgene@...nel.org>, linux-crypto@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org Cc: Alan Stern <stern@...land.harvard.edu>, Krzysztof Kozlowski <k.kozlowski@...sung.com> Subject: [PATCH v2 4/4] hwrng: exynos - Disable runtime PM on driver unbind Driver enabled runtime PM but did not revert this on removal. Re-binding of a device triggered warning: exynos-rng 10830400.rng: Unbalanced pm_runtime_enable! Fixes: b329669ea0b5 ("hwrng: exynos - Add support for Exynos random number generator") Signed-off-by: Krzysztof Kozlowski <k.kozlowski@...sung.com> --- Changes since v1: 1. Call also pm_runtime_dont_use_autosuspend() to revert everything set during probe. --- drivers/char/hw_random/exynos-rng.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/char/hw_random/exynos-rng.c b/drivers/char/hw_random/exynos-rng.c index 71b45b153cf2..ed78f25e4ec6 100644 --- a/drivers/char/hw_random/exynos-rng.c +++ b/drivers/char/hw_random/exynos-rng.c @@ -156,6 +156,14 @@ static int exynos_rng_probe(struct platform_device *pdev) return ret; } +static int exynos_rng_remove(struct platform_device *pdev) +{ + pm_runtime_dont_use_autosuspend(&pdev->dev); + pm_runtime_disable(&pdev->dev); + + return 0; +} + static int __maybe_unused exynos_rng_runtime_suspend(struct device *dev) { struct platform_device *pdev = to_platform_device(dev); @@ -213,6 +221,7 @@ static struct platform_driver exynos_rng_driver = { .of_match_table = exynos_rng_dt_match, }, .probe = exynos_rng_probe, + .remove = exynos_rng_remove, }; module_platform_driver(exynos_rng_driver); -- 2.5.0
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