[PATCH 4.4 91/92] hwrng: stm32 - fix unbalanced pm_runtime_enable

Greg Kroah-Hartman
2019-12-04T18:25:29Z

From: Lionel Debieve <lionel.debieve@st.com>

commit af0d4442dd6813de6e77309063beb064fa8e89ae upstream.

No remove function implemented yet in the driver.
Without remove function, the pm_runtime implementation
complains when removing and probing again the driver.

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/char/hw_random/stm32-rng.c | 8 ++++++++
1 file changed, 8 insertions(+)

--- a/drivers/char/hw_random/stm32-rng.c
+++ b/drivers/char/hw_random/stm32-rng.c
@@ -166,6 +166,13 @@ static int stm32_rng_probe(struct platfo
return devm_hwrng_register(dev, &priv->rng);
}

+static int stm32_rng_remove(struct platform_device *ofdev)
+{
+ pm_runtime_disable(&ofdev->dev);
+
+ return 0;
+}
+
#ifdef CONFIG_PM
static int stm32_rng_runtime_suspend(struct device *dev)
{
@@ -202,6 +209,7 @@ static struct platform_driver stm32_rng_
.of_match_table = stm32_rng_match,
},
.probe = stm32_rng_probe,
+ .remove = stm32_rng_remove,
};

module_platform_driver(stm32_rng_driver);