crypto: hisilicon/trng - 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: Weili Qian <qianweili@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/hisilicon/trng/trng.c b/drivers/crypto/hisilicon/trng/trng.c
index 97e500db0a8259b27f7186453f9153a55ad805d8..451b167bcc73dcd3d70bb4c04a266fa3b5b07c07 100644 (file)
--- a/drivers/crypto/hisilicon/trng/trng.c
+++ b/drivers/crypto/hisilicon/trng/trng.c
@@ -303,7 +303,7 @@ err_remove_from_list:
        return ret;
 }
 
-static int hisi_trng_remove(struct platform_device *pdev)
+static void hisi_trng_remove(struct platform_device *pdev)
 {
        struct hisi_trng *trng = platform_get_drvdata(pdev);
 
@@ -314,8 +314,6 @@ static int hisi_trng_remove(struct platform_device *pdev)
        if (trng->ver != HISI_TRNG_VER_V1 &&
            atomic_dec_return(&trng_active_devs) == 0)
                crypto_unregister_rng(&hisi_trng_alg);
-
-       return 0;
 }
 
 static const struct acpi_device_id hisi_trng_acpi_match[] = {
@@ -326,7 +324,7 @@ MODULE_DEVICE_TABLE(acpi, hisi_trng_acpi_match);
 
 static struct platform_driver hisi_trng_driver = {
        .probe          = hisi_trng_probe,
-       .remove         = hisi_trng_remove,
+       .remove_new     = hisi_trng_remove,
        .driver         = {
                .name   = "hisi-trng-v2",
                .acpi_match_table = ACPI_PTR(hisi_trng_acpi_match),