| Message ID | 20231009155945.285537-1-u.kleine-koenig@pengutronix.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ASoC: SOF: Convert to platform remove callback returning void | expand |
Il 09/10/23 17:59, 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(). > > The SOF platform drivers all use either sof_of_remove() or > sof_acpi_remove() which both return zero unconditionally. Change these > functions to return void and the drivers to use .remove_new(). There is > no semantical change. > > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
On Mon, Oct 9, 2023 at 7:03 PM Uwe Kleine-König <u.kleine-koenig@pengutronix.de> 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() will be renamed to .remove(). > > The SOF platform drivers all use either sof_of_remove() or > sof_acpi_remove() which both return zero unconditionally. Change these > functions to return void and the drivers to use .remove_new(). There is > no semantical change. > > Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com>
On 10/10/23 07:00, Daniel Baluta wrote: > On Mon, Oct 9, 2023 at 7:03 PM Uwe Kleine-König > <u.kleine-koenig@pengutronix.de> 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() will be renamed to .remove(). >> >> The SOF platform drivers all use either sof_of_remove() or >> sof_acpi_remove() which both return zero unconditionally. Change these >> functions to return void and the drivers to use .remove_new(). There is >> no semantical change. >> >> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> > > > > Reviewed-by: Daniel Baluta <daniel.baluta@nxp.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> FWIW I have a follow-up patch to convert the SOF remove ops to return void: https://github.com/thesofproject/linux/pull/4625
On Mon, 09 Oct 2023 17:59:45 +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 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(). > > [...] Applied to https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next Thanks! [1/1] ASoC: SOF: Convert to platform remove callback returning void commit: 52fee5c9158000db607d734383fd862969782de5 All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark
diff --git a/sound/soc/sof/imx/imx8.c b/sound/soc/sof/imx/imx8.c index 2844d9a8040a..5f81d562f9a4 100644 --- a/sound/soc/sof/imx/imx8.c +++ b/sound/soc/sof/imx/imx8.c @@ -650,7 +650,7 @@ MODULE_DEVICE_TABLE(of, sof_of_imx8_ids); /* DT driver definition */ static struct platform_driver snd_sof_of_imx8_driver = { .probe = sof_of_probe, - .remove = sof_of_remove, + .remove_new = sof_of_remove, .driver = { .name = "sof-audio-of-imx8", .pm = &sof_of_pm, diff --git a/sound/soc/sof/imx/imx8m.c b/sound/soc/sof/imx/imx8m.c index 1243f8a6141e..1573eecca781 100644 --- a/sound/soc/sof/imx/imx8m.c +++ b/sound/soc/sof/imx/imx8m.c @@ -495,7 +495,7 @@ MODULE_DEVICE_TABLE(of, sof_of_imx8m_ids); /* DT driver definition */ static struct platform_driver snd_sof_of_imx8m_driver = { .probe = sof_of_probe, - .remove = sof_of_remove, + .remove_new = sof_of_remove, .driver = { .name = "sof-audio-of-imx8m", .pm = &sof_of_pm, diff --git a/sound/soc/sof/imx/imx8ulp.c b/sound/soc/sof/imx/imx8ulp.c index 4a562c9856e9..3c26eba19cf9 100644 --- a/sound/soc/sof/imx/imx8ulp.c +++ b/sound/soc/sof/imx/imx8ulp.c @@ -502,7 +502,7 @@ MODULE_DEVICE_TABLE(of, sof_of_imx8ulp_ids); /* DT driver definition */ static struct platform_driver snd_sof_of_imx8ulp_driver = { .probe = sof_of_probe, - .remove = sof_of_remove, + .remove_new = sof_of_remove, .driver = { .name = "sof-audio-of-imx8ulp", .pm = &sof_of_pm, diff --git a/sound/soc/sof/intel/bdw.c b/sound/soc/sof/intel/bdw.c index 812a49b1d3f4..2b8fa5fba17b 100644 --- a/sound/soc/sof/intel/bdw.c +++ b/sound/soc/sof/intel/bdw.c @@ -684,7 +684,7 @@ static int sof_broadwell_probe(struct platform_device *pdev) /* acpi_driver definition */ static struct platform_driver snd_sof_acpi_intel_bdw_driver = { .probe = sof_broadwell_probe, - .remove = sof_acpi_remove, + .remove_new = sof_acpi_remove, .driver = { .name = "sof-audio-acpi-intel-bdw", .pm = &sof_acpi_pm, diff --git a/sound/soc/sof/intel/byt.c b/sound/soc/sof/intel/byt.c index faf223b38360..f62065f974e9 100644 --- a/sound/soc/sof/intel/byt.c +++ b/sound/soc/sof/intel/byt.c @@ -467,7 +467,7 @@ static int sof_baytrail_probe(struct platform_device *pdev) /* acpi_driver definition */ static struct platform_driver snd_sof_acpi_intel_byt_driver = { .probe = sof_baytrail_probe, - .remove = sof_acpi_remove, + .remove_new = sof_acpi_remove, .driver = { .name = "sof-audio-acpi-intel-byt", .pm = &sof_acpi_pm, diff --git a/sound/soc/sof/mediatek/mt8186/mt8186.c b/sound/soc/sof/mediatek/mt8186/mt8186.c index f587edf9e0a7..35d4b7125448 100644 --- a/sound/soc/sof/mediatek/mt8186/mt8186.c +++ b/sound/soc/sof/mediatek/mt8186/mt8186.c @@ -707,7 +707,7 @@ MODULE_DEVICE_TABLE(of, sof_of_mt8186_ids); /* DT driver definition */ static struct platform_driver snd_sof_of_mt8186_driver = { .probe = sof_of_probe, - .remove = sof_of_remove, + .remove_new = sof_of_remove, .shutdown = sof_of_shutdown, .driver = { .name = "sof-audio-of-mt8186", diff --git a/sound/soc/sof/mediatek/mt8195/mt8195.c b/sound/soc/sof/mediatek/mt8195/mt8195.c index 7d6a568556ea..1d0d9289293a 100644 --- a/sound/soc/sof/mediatek/mt8195/mt8195.c +++ b/sound/soc/sof/mediatek/mt8195/mt8195.c @@ -660,7 +660,7 @@ MODULE_DEVICE_TABLE(of, sof_of_mt8195_ids); /* DT driver definition */ static struct platform_driver snd_sof_of_mt8195_driver = { .probe = sof_of_probe, - .remove = sof_of_remove, + .remove_new = sof_of_remove, .shutdown = sof_of_shutdown, .driver = { .name = "sof-audio-of-mt8195", diff --git a/sound/soc/sof/sof-acpi-dev.c b/sound/soc/sof/sof-acpi-dev.c index 1b04dcb33293..3fec5c1f41d4 100644 --- a/sound/soc/sof/sof-acpi-dev.c +++ b/sound/soc/sof/sof-acpi-dev.c @@ -97,7 +97,7 @@ int sof_acpi_probe(struct platform_device *pdev, const struct sof_dev_desc *desc } EXPORT_SYMBOL_NS(sof_acpi_probe, SND_SOC_SOF_ACPI_DEV); -int sof_acpi_remove(struct platform_device *pdev) +void sof_acpi_remove(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -106,8 +106,6 @@ int sof_acpi_remove(struct platform_device *pdev) /* call sof helper for DSP hardware remove */ snd_sof_device_remove(dev); - - return 0; } EXPORT_SYMBOL_NS(sof_acpi_remove, SND_SOC_SOF_ACPI_DEV); diff --git a/sound/soc/sof/sof-acpi-dev.h b/sound/soc/sof/sof-acpi-dev.h index 5c2b558d2ace..9bf8f75ceaae 100644 --- a/sound/soc/sof/sof-acpi-dev.h +++ b/sound/soc/sof/sof-acpi-dev.h @@ -11,6 +11,6 @@ extern const struct dev_pm_ops sof_acpi_pm; int sof_acpi_probe(struct platform_device *pdev, const struct sof_dev_desc *desc); -int sof_acpi_remove(struct platform_device *pdev); +void sof_acpi_remove(struct platform_device *pdev); #endif diff --git a/sound/soc/sof/sof-of-dev.c b/sound/soc/sof/sof-of-dev.c index 53faeccedd4f..7fe9e4a261fd 100644 --- a/sound/soc/sof/sof-of-dev.c +++ b/sound/soc/sof/sof-of-dev.c @@ -84,14 +84,12 @@ int sof_of_probe(struct platform_device *pdev) } EXPORT_SYMBOL(sof_of_probe); -int sof_of_remove(struct platform_device *pdev) +void sof_of_remove(struct platform_device *pdev) { pm_runtime_disable(&pdev->dev); /* call sof helper for DSP hardware remove */ snd_sof_device_remove(&pdev->dev); - - return 0; } EXPORT_SYMBOL(sof_of_remove); diff --git a/sound/soc/sof/sof-of-dev.h b/sound/soc/sof/sof-of-dev.h index 2948b3a0d9fe..b6cc70595f3b 100644 --- a/sound/soc/sof/sof-of-dev.h +++ b/sound/soc/sof/sof-of-dev.h @@ -19,7 +19,7 @@ struct snd_sof_of_mach { extern const struct dev_pm_ops sof_of_pm; int sof_of_probe(struct platform_device *pdev); -int sof_of_remove(struct platform_device *pdev); +void sof_of_remove(struct platform_device *pdev); void sof_of_shutdown(struct platform_device *pdev); #endif
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(). The SOF platform drivers all use either sof_of_remove() or sof_acpi_remove() which both return zero unconditionally. Change these functions to return void and the drivers to use .remove_new(). There is no semantical change. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> --- sound/soc/sof/imx/imx8.c | 2 +- sound/soc/sof/imx/imx8m.c | 2 +- sound/soc/sof/imx/imx8ulp.c | 2 +- sound/soc/sof/intel/bdw.c | 2 +- sound/soc/sof/intel/byt.c | 2 +- sound/soc/sof/mediatek/mt8186/mt8186.c | 2 +- sound/soc/sof/mediatek/mt8195/mt8195.c | 2 +- sound/soc/sof/sof-acpi-dev.c | 4 +--- sound/soc/sof/sof-acpi-dev.h | 2 +- sound/soc/sof/sof-of-dev.c | 4 +--- sound/soc/sof/sof-of-dev.h | 2 +- 11 files changed, 11 insertions(+), 15 deletions(-) base-commit: 0bb80ecc33a8fb5a682236443c1e740d5c917d1d