hwrng: stm32 - fix pm_suspend issue

When suspend is called after pm_runtime_suspend,
same callback is used and access to rng register is
freezing system. By calling the pm_runtime_force_suspend,
it first checks that runtime has been already done.

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/char/hw_random/stm32-rng.c b/drivers/char/hw_random/stm32-rng.c
index 0d2328d..042860d 100644 (file)
--- a/drivers/char/hw_random/stm32-rng.c
+++ b/drivers/char/hw_random/stm32-rng.c
@@ -187,8 +187,13 @@ static int stm32_rng_runtime_resume(struct device *dev)
 }
 #endif
 
-static UNIVERSAL_DEV_PM_OPS(stm32_rng_pm_ops, stm32_rng_runtime_suspend,
-                           stm32_rng_runtime_resume, NULL);
+static const struct dev_pm_ops stm32_rng_pm_ops = {
+       SET_RUNTIME_PM_OPS(stm32_rng_runtime_suspend,
+                          stm32_rng_runtime_resume, NULL)
+       SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+                               pm_runtime_force_resume)
+};
+
 
 static const struct of_device_id stm32_rng_match[] = {
        {