| Message ID | 20230403154014.2564054-11-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | staging: Convert to platform remove callback returning void | expand |
On Mo, 2023-04-03 at 17:40 +0200, Uwe Kleine-König wrote: > 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 (mostly) ignored > 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. > > 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: Philipp Zabel <p.zabel@pengutronix.de> regards Philipp
diff --git a/drivers/staging/media/imx/imx6-mipi-csi2.c b/drivers/staging/media/imx/imx6-mipi-csi2.c index c4cb558a85c6..c07994ea6e96 100644 --- a/drivers/staging/media/imx/imx6-mipi-csi2.c +++ b/drivers/staging/media/imx/imx6-mipi-csi2.c @@ -765,7 +765,7 @@ static int csi2_probe(struct platform_device *pdev) return ret; } -static int csi2_remove(struct platform_device *pdev) +static void csi2_remove(struct platform_device *pdev) { struct v4l2_subdev *sd = platform_get_drvdata(pdev); struct csi2_dev *csi2 = sd_to_dev(sd); @@ -777,8 +777,6 @@ static int csi2_remove(struct platform_device *pdev) clk_disable_unprepare(csi2->pllref_clk); mutex_destroy(&csi2->lock); media_entity_cleanup(&sd->entity); - - return 0; } static const struct of_device_id csi2_dt_ids[] = { @@ -793,7 +791,7 @@ static struct platform_driver csi2_driver = { .of_match_table = csi2_dt_ids, }, .probe = csi2_probe, - .remove = csi2_remove, + .remove_new = csi2_remove, }; module_platform_driver(csi2_driver);
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 (mostly) ignored 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. 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/staging/media/imx/imx6-mipi-csi2.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)