| Message ID | 20230925095532.1984344-16-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | soc: Convert to platform remove callback returning void | expand |
Il 25/09/23 11:55, Uwe Kleine-König ha scritto: > 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: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
diff --git a/drivers/soc/mediatek/mtk-mmsys.c b/drivers/soc/mediatek/mtk-mmsys.c index ffb75711a1da..88209102ff3b 100644 --- a/drivers/soc/mediatek/mtk-mmsys.c +++ b/drivers/soc/mediatek/mtk-mmsys.c @@ -410,14 +410,12 @@ static int mtk_mmsys_probe(struct platform_device *pdev) return 0; } -static int mtk_mmsys_remove(struct platform_device *pdev) +static void mtk_mmsys_remove(struct platform_device *pdev) { struct mtk_mmsys *mmsys = platform_get_drvdata(pdev); platform_device_unregister(mmsys->drm_pdev); platform_device_unregister(mmsys->clks_pdev); - - return 0; } static const struct of_device_id of_match_mtk_mmsys[] = { @@ -449,7 +447,7 @@ static struct platform_driver mtk_mmsys_drv = { .of_match_table = of_match_mtk_mmsys, }, .probe = mtk_mmsys_probe, - .remove = mtk_mmsys_remove, + .remove_new = mtk_mmsys_remove, }; module_platform_driver(mtk_mmsys_drv);
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> --- drivers/soc/mediatek/mtk-mmsys.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)