diff options
Diffstat (limited to 'drivers/char/hw_random/exynos-rng.c')
| -rw-r--r-- | drivers/char/hw_random/exynos-rng.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/char/hw_random/exynos-rng.c b/drivers/char/hw_random/exynos-rng.c index b98a141ea..ed44561ea 100644 --- a/drivers/char/hw_random/exynos-rng.c +++ b/drivers/char/hw_random/exynos-rng.c @@ -2,7 +2,7 @@ * exynos-rng.c - Random Number Generator driver for the exynos * * Copyright (C) 2012 Samsung Electronics - * Jonghwa Lee <jonghwa3.lee@smasung.com> + * Jonghwa Lee <jonghwa3.lee@samsung.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -77,7 +77,8 @@ static int exynos_init(struct hwrng *rng) pm_runtime_get_sync(exynos_rng->dev); ret = exynos_rng_configure(exynos_rng); - pm_runtime_put_noidle(exynos_rng->dev); + pm_runtime_mark_last_busy(exynos_rng->dev); + pm_runtime_put_autosuspend(exynos_rng->dev); return ret; } @@ -118,6 +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); @@ -145,7 +147,21 @@ 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 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) @@ -205,6 +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); |