crypto: qcom-rng - Convert to platform remove callback returning void

The .remove() callback for a platform driver returns an int which makes
many driver authors wrongly assume it's possible to do error handling by
returning an error code. However the value returned is ignored (apart
from emitting a warning) and this typically results in resource leaks.

To improve here there is a quest to make the remove callback return
void. In the first step of this quest all drivers are converted to
.remove_new(), which already returns void. Eventually after all drivers
are converted, .remove_new() will be renamed to .remove().

Trivially convert this driver from always returning zero in the remove
callback to the void returning variant.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/qcom-rng.c b/drivers/crypto/qcom-rng.c
index f46b92bb14b5454d33ace86088059565b17f67ff..c670d7d0c11ea8969551298482b13c0c3680b165 100644 (file)
--- a/drivers/crypto/qcom-rng.c
+++ b/drivers/crypto/qcom-rng.c
@@ -224,13 +224,11 @@ fail:
        return ret;
 }
 
-static int qcom_rng_remove(struct platform_device *pdev)
+static void qcom_rng_remove(struct platform_device *pdev)
 {
        crypto_unregister_rng(&qcom_rng_alg);
 
        qcom_rng_dev = NULL;
-
-       return 0;
 }
 
 static struct qcom_rng_of_data qcom_prng_of_data = {
@@ -264,7 +262,7 @@ MODULE_DEVICE_TABLE(of, qcom_rng_of_match);
 
 static struct platform_driver qcom_rng_driver = {
        .probe = qcom_rng_probe,
-       .remove =  qcom_rng_remove,
+       .remove_new =  qcom_rng_remove,
        .driver = {
                .name = KBUILD_MODNAME,
                .of_match_table = of_match_ptr(qcom_rng_of_match),