From 48a61e1e2af8020f11a2b8f8dc878144477623c6 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Mon, 14 Mar 2016 09:07:14 +0900 Subject: [PATCH] hwrng: exynos - Disable runtime PM on probe failure Add proper error path (for disabling runtime PM) when registering of hwrng fails. Fixes: b329669ea0b5 ("hwrng: exynos - Add support for Exynos random number generator") Signed-off-by: Krzysztof Kozlowski Signed-off-by: Herbert Xu --- drivers/char/hw_random/exynos-rng.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/char/hw_random/exynos-rng.c b/drivers/char/hw_random/exynos-rng.c index 38b80f82ddd2..71b45b153cf2 100644 --- a/drivers/char/hw_random/exynos-rng.c +++ b/drivers/char/hw_random/exynos-rng.c @@ -119,6 +119,7 @@ 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); @@ -146,7 +147,13 @@ 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; } static int __maybe_unused exynos_rng_runtime_suspend(struct device *dev) -- 2.39.5