| Message ID | 20230919133207.1400430-36-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
| Series | dma: Convert to platform remove callback returning void | expand |
On 9/19/23 15:31, 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 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() is 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: Konrad Dybcio <konrad.dybcio@linaro.org> Konrad
diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c index 834ae519c15d..f4659553945b 100644 --- a/drivers/dma/qcom/hidma.c +++ b/drivers/dma/qcom/hidma.c @@ -915,7 +915,7 @@ static void hidma_shutdown(struct platform_device *pdev) } -static int hidma_remove(struct platform_device *pdev) +static void hidma_remove(struct platform_device *pdev) { struct hidma_dev *dmadev = platform_get_drvdata(pdev); @@ -935,8 +935,6 @@ static int hidma_remove(struct platform_device *pdev) dev_info(&pdev->dev, "HI-DMA engine removed\n"); pm_runtime_put_sync_suspend(&pdev->dev); pm_runtime_disable(&pdev->dev); - - return 0; } #if IS_ENABLED(CONFIG_ACPI) @@ -960,7 +958,7 @@ MODULE_DEVICE_TABLE(of, hidma_match); static struct platform_driver hidma_driver = { .probe = hidma_probe, - .remove = hidma_remove, + .remove_new = hidma_remove, .shutdown = hidma_shutdown, .driver = { .name = "hidma",
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() is 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/dma/qcom/hidma.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-)