[PATCH v2 3/4] hwrng: exynos - Disable runtime PM on probe failure
From: Krzysztof Kozlowski <hidden>
Date: 2016-03-14 00:08:11
Also in:
linux-crypto, linux-samsung-soc, lkml
Subsystem:
hardware random number generator core, the rest · Maintainers:
Olivia Mackall, Herbert Xu, Linus Torvalds
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 <redacted>
---
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, 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)
--
2.5.0