[PATCH v2 4/4] hwrng: exynos - Disable runtime PM on driver unbind
From: Krzysztof Kozlowski <hidden>
Date: 2016-03-14 00:08:00
Also in:
linux-crypto, linux-samsung-soc, lkml
Subsystem:
hardware random number generator core, the rest · Maintainers:
Olivia Mackall, Herbert Xu, Linus Torvalds
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: 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, 9 insertions(+)
diff --git a/drivers/char/hw_random/exynos-rng.c b/drivers/char/hw_random/exynos-rng.c
index 71b45b153cf2..ed78f25e4ec6 100644
--- a/drivers/char/hw_random/exynos-rng.c
+++ b/drivers/char/hw_random/exynos-rng.c@@ -156,6 +156,14 @@ static int exynos_rng_probe(struct platform_device *pdev) 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) { struct platform_device *pdev = to_platform_device(dev);
@@ -213,6 +221,7 @@ static struct platform_driver exynos_rng_driver = { .of_match_table = exynos_rng_dt_match, }, .probe = exynos_rng_probe, + .remove = exynos_rng_remove, }; module_platform_driver(exynos_rng_driver);
--
2.5.0