hwrng: optee - Use device-managed registration API

Use devm_hwrng_register to get rid of manual unregistration.

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Reviewed-by: Sumit Garg <sumit.garg@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/char/hw_random/optee-rng.c b/drivers/char/hw_random/optee-rng.c
index a99d829..135a825 100644 (file)
--- a/drivers/char/hw_random/optee-rng.c
+++ b/drivers/char/hw_random/optee-rng.c
@@ -243,7 +243,7 @@ static int optee_rng_probe(struct device *dev)
        if (err)
                goto out_sess;
 
-       err = hwrng_register(&pvt_data.optee_rng);
+       err = devm_hwrng_register(dev, &pvt_data.optee_rng);
        if (err) {
                dev_err(dev, "hwrng registration failed (%d)\n", err);
                goto out_sess;
@@ -263,7 +263,6 @@ out_ctx:
 
 static int optee_rng_remove(struct device *dev)
 {
-       hwrng_unregister(&pvt_data.optee_rng);
        tee_client_close_session(pvt_data.ctx, pvt_data.session_id);
        tee_client_close_context(pvt_data.ctx);