Hello Greg,
On Wed, Aug 07, 2024 at 04:59:03PM +0200, Greg Kroah-Hartman wrote:
> 6.6-stable review patch. If anyone has any objections, please let me know.
>
> ------------------
>
> From: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
>
> [ Upstream commit f29ecd3748a28d0b52512afc81b3c13fd4a00c9b ]
>
> 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@xxxxxxxxxxxxxx>
> Acked-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> Stable-dep-of: e90c369cc2ff ("thermal/drivers/broadcom: Fix race between removal and clock disable")
> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
> ---
> drivers/thermal/broadcom/bcm2835_thermal.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/thermal/broadcom/bcm2835_thermal.c b/drivers/thermal/broadcom/bcm2835_thermal.c
> index 3acc9288b3105..5c1cebe075801 100644
> --- a/drivers/thermal/broadcom/bcm2835_thermal.c
> +++ b/drivers/thermal/broadcom/bcm2835_thermal.c
> @@ -282,19 +282,17 @@ static int bcm2835_thermal_probe(struct platform_device *pdev)
> return err;
> }
>
> -static int bcm2835_thermal_remove(struct platform_device *pdev)
> +static void bcm2835_thermal_remove(struct platform_device *pdev)
> {
> struct bcm2835_thermal_data *data = platform_get_drvdata(pdev);
>
> debugfs_remove_recursive(data->debugfsdir);
> clk_disable_unprepare(data->clk);
> -
> - return 0;
> }
>
> static struct platform_driver bcm2835_thermal_driver = {
> .probe = bcm2835_thermal_probe,
> - .remove = bcm2835_thermal_remove,
> + .remove_new = bcm2835_thermal_remove,
> .driver = {
> .name = "bcm2835_thermal",
> .of_match_table = bcm2835_thermal_of_match_table,
While I'm confident this patch not to break anything (there are so many
of this type in mainline now and none regressed), it should be also easy
to port the follow up patches onto 6.6.x without this change.
No strong opinion and maybe being able to cleanly cherry pick later
changes is important enough to keep this conversion? Otherwise I'd tend
to drop this patch.
Best regards
Uwe
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