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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>
This commit is contained in:
lionel.debieve@st.com 2018-04-23 17:04:26 +02:00 committed by Herbert Xu
parent af513781f2
commit 9bae54942b
1 changed files with 7 additions and 2 deletions
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9
drivers/char/hw_random/stm32-rng.c
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@ -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[] = {
{