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hwrng: exynos - Disable runtime PM on probe failure

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commit 48a61e1e2a upstream.

Add proper error path (for disabling runtime PM) when registering of
hwrng fails.

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 09:07:14 +09:00 committed by Greg Kroah-Hartman
parent aaac8cab2f
commit 390bddc4a3
1 changed files with 8 additions and 1 deletions
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9
drivers/char/hw_random/exynos-rng.c
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@ -118,6 +118,7 @@ static int exynos_rng_probe(struct platform_device *pdev)
{
struct exynos_rng *exynos_rng;
struct resource *res;
int ret;
exynos_rng = devm_kzalloc(&pdev->dev, sizeof(struct exynos_rng),
GFP_KERNEL);
@ -145,7 +146,13 @@ static int exynos_rng_probe(struct platform_device *pdev)
pm_runtime_use_autosuspend(&pdev->dev);
pm_runtime_enable(&pdev->dev);
return devm_hwrng_register(&pdev->dev, &exynos_rng->rng);
ret = devm_hwrng_register(&pdev->dev, &exynos_rng->rng);
if (ret) {
pm_runtime_dont_use_autosuspend(&pdev->dev);
pm_runtime_disable(&pdev->dev);
}
return ret;
}
#ifdef CONFIG_PM