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authorKrzysztof Kozlowski <k.kozlowski@samsung.com>2016-03-14 09:07:14 +0900
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-09-15 08:27:54 +0200
commit390bddc4a36d2ce015a9d78d8624e575cbac9cd3 (patch)
tree7cc2f40014c8b898fbd7555a2ee1a25534940d5a /drivers
parentaaac8cab2f92aa235f6f79e8cff52bf11c0fbf1d (diff)
hwrng: exynos - Disable runtime PM on probe failure
commit 48a61e1e2af8020f11a2b8f8dc878144477623c6 upstream. 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 <k.kozlowski@samsung.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/char/hw_random/exynos-rng.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/char/hw_random/exynos-rng.c b/drivers/char/hw_random/exynos-rng.c
index aa30af5f0f2b..7845a38b6604 100644
--- a/drivers/char/hw_random/exynos-rng.c
+++ b/drivers/char/hw_random/exynos-rng.c
@@ -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