From 1c8cd7b64efe9f928b0f21eb88cdd9341f30ab85 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Date: Mon, 14 Mar 2016 09:07:15 +0900
Subject: [PATCH] hwrng: exynos - Disable runtime PM on driver unbind
commit 27d80fa8bccf8d28bef4f89709638efc624fef9a upstream.
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 <k.kozlowski@samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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 7ba0ae060d61..66115ef979b1 100644
--- a/drivers/char/hw_random/exynos-rng.c
+++ b/drivers/char/hw_random/exynos-rng.c
@@ -155,6 +155,14 @@ 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);
@@ -212,6 +220,7 @@ 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);