hwrng: stm32 - Fix runtime PM cleanup on registration failure

stm32_rng_probe() enables autosuspend and runtime PM before registering the
hwrng. If devm_hwrng_register() fails, probe returns with runtime PM left
enabled and autosuspend still selected.

The remove callback also only disables runtime PM and does not undo
pm_runtime_use_autosuspend().

Use devm_pm_runtime_enable() so runtime PM is unwound automatically on
probe failure and driver detach. Since the managed cleanup also disables
runtime PM,drop the remove callback.

Fixes: c6a97c42e399 ("hwrng: stm32 - add support for STM32 HW RNG")
Cc: stable@vger.kernel.org
Signed-off-by: Can Peng <pengcan@kylinos.cn>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

0 files changed, 0 insertions, 0 deletions