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 <[email protected]>
---
drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
index 3bcfcfc37084..ba80878e2df5 100644
--- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
+++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
@@ -509,7 +509,7 @@ static int sun4i_ss_probe(struct platform_device *pdev)
return err;
}
-static int sun4i_ss_remove(struct platform_device *pdev)
+static void sun4i_ss_remove(struct platform_device *pdev)
{
int i;
struct sun4i_ss_ctx *ss = platform_get_drvdata(pdev);
@@ -529,7 +529,6 @@ static int sun4i_ss_remove(struct platform_device *pdev)
}
sun4i_ss_pm_exit(ss);
- return 0;
}
static const struct of_device_id a20ss_crypto_of_match_table[] = {
@@ -545,7 +544,7 @@ MODULE_DEVICE_TABLE(of, a20ss_crypto_of_match_table);
static struct platform_driver sun4i_ss_driver = {
.probe = sun4i_ss_probe,
- .remove = sun4i_ss_remove,
+ .remove_new = sun4i_ss_remove,
.driver = {
.name = "sun4i-ss",
.pm = &sun4i_ss_pm_ops,
--
2.42.0
On Fri, 20 Oct 2023 09:55:23 +0200
Uwe Kleine-König <[email protected]> wrote:
Hi,
> 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 <[email protected]>
Reviewed-by: Andre Przywara <[email protected]>
Cheers,
Andre
> ---
> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
> index 3bcfcfc37084..ba80878e2df5 100644
> --- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
> +++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
> @@ -509,7 +509,7 @@ static int sun4i_ss_probe(struct platform_device *pdev)
> return err;
> }
>
> -static int sun4i_ss_remove(struct platform_device *pdev)
> +static void sun4i_ss_remove(struct platform_device *pdev)
> {
> int i;
> struct sun4i_ss_ctx *ss = platform_get_drvdata(pdev);
> @@ -529,7 +529,6 @@ static int sun4i_ss_remove(struct platform_device *pdev)
> }
>
> sun4i_ss_pm_exit(ss);
> - return 0;
> }
>
> static const struct of_device_id a20ss_crypto_of_match_table[] = {
> @@ -545,7 +544,7 @@ MODULE_DEVICE_TABLE(of, a20ss_crypto_of_match_table);
>
> static struct platform_driver sun4i_ss_driver = {
> .probe = sun4i_ss_probe,
> - .remove = sun4i_ss_remove,
> + .remove_new = sun4i_ss_remove,
> .driver = {
> .name = "sun4i-ss",
> .pm = &sun4i_ss_pm_ops,
Dne petek, 20. oktober 2023 ob 09:55:23 CEST je Uwe Kleine-K?nig napisal(a):
> 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-K?nig <[email protected]>
> ---
Reviewed-by: Jernej Skrabec <[email protected]>
Best regards,
Jernej
> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
> index 3bcfcfc37084..ba80878e2df5 100644
> --- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
> +++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
> @@ -509,7 +509,7 @@ static int sun4i_ss_probe(struct platform_device *pdev)
> return err;
> }
>
> -static int sun4i_ss_remove(struct platform_device *pdev)
> +static void sun4i_ss_remove(struct platform_device *pdev)
> {
> int i;
> struct sun4i_ss_ctx *ss = platform_get_drvdata(pdev);
> @@ -529,7 +529,6 @@ static int sun4i_ss_remove(struct platform_device *pdev)
> }
>
> sun4i_ss_pm_exit(ss);
> - return 0;
> }
>
> static const struct of_device_id a20ss_crypto_of_match_table[] = {
> @@ -545,7 +544,7 @@ MODULE_DEVICE_TABLE(of, a20ss_crypto_of_match_table);
>
> static struct platform_driver sun4i_ss_driver = {
> .probe = sun4i_ss_probe,
> - .remove = sun4i_ss_remove,
> + .remove_new = sun4i_ss_remove,
> .driver = {
> .name = "sun4i-ss",
> .pm = &sun4i_ss_pm_ops,
>
Le Fri, Oct 20, 2023 at 09:55:23AM +0200, Uwe Kleine-K?nig a ?crit :
> 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-K?nig <[email protected]>
> ---
> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
> index 3bcfcfc37084..ba80878e2df5 100644
> --- a/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
> +++ b/drivers/crypto/allwinner/sun4i-ss/sun4i-ss-core.c
> @@ -509,7 +509,7 @@ static int sun4i_ss_probe(struct platform_device *pdev)
> return err;
> }
>
> -static int sun4i_ss_remove(struct platform_device *pdev)
> +static void sun4i_ss_remove(struct platform_device *pdev)
> {
> int i;
> struct sun4i_ss_ctx *ss = platform_get_drvdata(pdev);
> @@ -529,7 +529,6 @@ static int sun4i_ss_remove(struct platform_device *pdev)
> }
>
> sun4i_ss_pm_exit(ss);
> - return 0;
> }
>
> static const struct of_device_id a20ss_crypto_of_match_table[] = {
> @@ -545,7 +544,7 @@ MODULE_DEVICE_TABLE(of, a20ss_crypto_of_match_table);
>
> static struct platform_driver sun4i_ss_driver = {
> .probe = sun4i_ss_probe,
> - .remove = sun4i_ss_remove,
> + .remove_new = sun4i_ss_remove,
> .driver = {
> .name = "sun4i-ss",
> .pm = &sun4i_ss_pm_ops,
> --
> 2.42.0
>
Acked-by: Corentin Labbe <[email protected]>
Thanks