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hwrng: exynos - Disable runtime PM on driver unbind

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commit 27d80fa8bccf8d28bef4f89709638efc624fef9a upstream.

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: b329669ea0 ("hwrng: exynos - Add support for Exynos random number generator")
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Krzysztof Kozlowski 2016-03-14 09:07:15 +09:00 • committed by Greg Kroah-Hartman
parent 35a0170097
commit 1c8cd7b64e
1 changed files with 9 additions and 0 deletions
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9
drivers/char/hw_random/exynos-rng.c
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@ -155,6 +155,14 @@ static int exynos_rng_probe(struct platform_device *pdev)
return ret; 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) static int __maybe_unused exynos_rng_runtime_suspend(struct device *dev)
{ {
struct platform_device *pdev = to_platform_device(dev); struct platform_device *pdev = to_platform_device(dev);
@ -212,6 +220,7 @@ static struct platform_driver exynos_rng_driver = {
.of_match_table = exynos_rng_dt_match, .of_match_table = exynos_rng_dt_match,
}, },
.probe = exynos_rng_probe, .probe = exynos_rng_probe,
.remove = exynos_rng_remove,
}; };
module_platform_driver(exynos_rng_driver); module_platform_driver(exynos_rng_driver);