[PATCH 00/31] thermal: Convert to platform remove callback returning void

[PATCH 00/31] thermal: Convert to platform remove callback returning void

[Uwe Kleine-König]

Hello,

this series converts all platform drivers below drivers/thermal to use
.remove_new(). The motivation is to get rid of an integer return code
that is (mostly) ignored by the platform driver core and error prone on
the driver side.

See commit 5c5a7680e67b ("platform: Provide a remove callback that
returns no value") for an extended explanation and the eventual goal.

There are no interdependencies between the patches. As there are still
quite a few drivers to convert, I'm happy about every patch that makes
it in. So even if there is a merge conflict with one patch until you
apply or a subject prefix is suboptimal, please apply the remainder of
this series anyhow.

Best regards
Uwe

Uwe Kleine-König (31):
  thermal: amlogic: Convert to platform remove callback returning void
  thermal: armada: Convert to platform remove callback returning void
  thermal: bcm2835: Convert to platform remove callback returning void
  thermal: ns: Convert to platform remove callback returning void
  thermal: da9062: Convert to platform remove callback returning void
  thermal: dove: Convert to platform remove callback returning void
  thermal: hisi: Convert to platform remove callback returning void
  thermal: imx8mm: Convert to platform remove callback returning void
  thermal: imx: Convert to platform remove callback returning void
  thermal: int3400: Convert to platform remove callback returning void
  thermal: int3401: Convert to platform remove callback returning void
  thermal: int3402: Convert to platform remove callback returning void
  thermal: int3403: Convert to platform remove callback returning void
  thermal: int3406: Convert to platform remove callback returning void
  thermal: k3_bandgap: Convert to platform remove callback returning void
  thermal: k3_j72xx_bandgap: Convert to platform remove callback returning void
  thermal: kirkwood: Convert to platform remove callback returning void
  thermal: lvts: Convert to platform remove callback returning void
  thermal: tsens: Convert to platform remove callback returning void
  thermal: rcar_gen3: Convert to platform remove callback returning void
  thermal: rcar: Convert to platform remove callback returning void
  thermal: rockchip: Convert to platform remove callback returning void
  thermal: rzg2l: Convert to platform remove callback returning void
  thermal: exynos_tmu: Convert to platform remove callback returning void
  thermal: spear: Convert to platform remove callback returning void
  thermal: sprd: Convert to platform remove callback returning void
  thermal: stm: Convert to platform remove callback returning void
  thermal: soctherm: Convert to platform remove callback returning void
  thermal: tegra-bpmp: Convert to platform remove callback returning void
  thermal: ti-bandgap: Convert to platform remove callback returning void
  thermal: uniphier: Convert to platform remove callback returning void

 drivers/thermal/amlogic_thermal.c                    | 12 +++++-------
 drivers/thermal/armada_thermal.c                     |  6 ++----
 drivers/thermal/broadcom/bcm2835_thermal.c           |  6 ++----
 drivers/thermal/broadcom/ns-thermal.c                |  6 ++----
 drivers/thermal/da9062-thermal.c                     |  5 ++---
 drivers/thermal/dove_thermal.c                       |  6 ++----
 drivers/thermal/hisi_thermal.c                       |  6 ++----
 drivers/thermal/imx8mm_thermal.c                     |  6 ++----
 drivers/thermal/imx_thermal.c                        |  6 ++----
 .../thermal/intel/int340x_thermal/int3400_thermal.c  |  5 ++---
 .../thermal/intel/int340x_thermal/int3401_thermal.c  |  6 ++----
 .../thermal/intel/int340x_thermal/int3402_thermal.c  |  6 ++----
 .../thermal/intel/int340x_thermal/int3403_thermal.c  |  6 ++----
 .../thermal/intel/int340x_thermal/int3406_thermal.c  |  5 ++---
 drivers/thermal/k3_bandgap.c                         |  6 ++----
 drivers/thermal/k3_j72xx_bandgap.c                   |  6 ++----
 drivers/thermal/kirkwood_thermal.c                   |  6 ++----
 drivers/thermal/mediatek/lvts_thermal.c              |  6 ++----
 drivers/thermal/qcom/tsens.c                         |  6 ++----
 drivers/thermal/rcar_gen3_thermal.c                  |  6 ++----
 drivers/thermal/rcar_thermal.c                       |  6 ++----
 drivers/thermal/rockchip_thermal.c                   |  6 ++----
 drivers/thermal/rzg2l_thermal.c                      |  6 ++----
 drivers/thermal/samsung/exynos_tmu.c                 |  6 ++----
 drivers/thermal/spear_thermal.c                      |  6 ++----
 drivers/thermal/sprd_thermal.c                       |  5 ++---
 drivers/thermal/st/stm_thermal.c                     |  6 ++----
 drivers/thermal/tegra/soctherm.c                     |  6 ++----
 drivers/thermal/tegra/tegra-bpmp-thermal.c           |  6 ++----
 drivers/thermal/ti-soc-thermal/ti-bandgap.c          |  6 ++----
 drivers/thermal/uniphier_thermal.c                   |  6 ++----
 31 files changed, 65 insertions(+), 123 deletions(-)

base-commit: 18030226a48de1fbfabf4ae16aaa2695a484254f
-- 
2.40.1


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[PATCH 22/31] thermal: rockchip: Convert to platform remove callback returning void

[Uwe Kleine-König]

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/thermal/rockchip_thermal.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
index 77231a9d28ff..086ed42dd16c 100644
--- a/drivers/thermal/rockchip_thermal.c
+++ b/drivers/thermal/rockchip_thermal.c
@@ -1601,7 +1601,7 @@ static int rockchip_thermal_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int rockchip_thermal_remove(struct platform_device *pdev)
+static void rockchip_thermal_remove(struct platform_device *pdev)
 {
 	struct rockchip_thermal_data *thermal = platform_get_drvdata(pdev);
 	int i;
@@ -1614,8 +1614,6 @@ static int rockchip_thermal_remove(struct platform_device *pdev)
 	}
 
 	thermal->chip->control(thermal->regs, false);
-
-	return 0;
 }
 
 static int __maybe_unused rockchip_thermal_suspend(struct device *dev)
@@ -1691,7 +1689,7 @@ static struct platform_driver rockchip_thermal_driver = {
 		.of_match_table = of_rockchip_thermal_match,
 	},
 	.probe = rockchip_thermal_probe,
-	.remove = rockchip_thermal_remove,
+	.remove_new = rockchip_thermal_remove,
 };
 
 module_platform_driver(rockchip_thermal_driver);
-- 
2.40.1


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Re: [PATCH 00/31] thermal: Convert to platform remove callback returning void

[Rafael J. Wysocki]

Hi,

On Wed, Sep 27, 2023 at 9:38 PM Uwe Kleine-König
<u.kleine-koenig@pengutronix.de> wrote:
>
> Hello,
>
> this series converts all platform drivers below drivers/thermal to use
> .remove_new(). The motivation is to get rid of an integer return code
> that is (mostly) ignored by the platform driver core and error prone on
> the driver side.
>
> See commit 5c5a7680e67b ("platform: Provide a remove callback that
> returns no value") for an extended explanation and the eventual goal.
>
> There are no interdependencies between the patches. As there are still
> quite a few drivers to convert, I'm happy about every patch that makes
> it in. So even if there is a merge conflict with one patch until you
> apply or a subject prefix is suboptimal, please apply the remainder of
> this series anyhow.

I think I'll go ahead and apply all of this in one go (for 6.7).

Daniel, any objections?


> Uwe Kleine-König (31):
>   thermal: amlogic: Convert to platform remove callback returning void
>   thermal: armada: Convert to platform remove callback returning void
>   thermal: bcm2835: Convert to platform remove callback returning void
>   thermal: ns: Convert to platform remove callback returning void
>   thermal: da9062: Convert to platform remove callback returning void
>   thermal: dove: Convert to platform remove callback returning void
>   thermal: hisi: Convert to platform remove callback returning void
>   thermal: imx8mm: Convert to platform remove callback returning void
>   thermal: imx: Convert to platform remove callback returning void
>   thermal: int3400: Convert to platform remove callback returning void
>   thermal: int3401: Convert to platform remove callback returning void
>   thermal: int3402: Convert to platform remove callback returning void
>   thermal: int3403: Convert to platform remove callback returning void
>   thermal: int3406: Convert to platform remove callback returning void
>   thermal: k3_bandgap: Convert to platform remove callback returning void
>   thermal: k3_j72xx_bandgap: Convert to platform remove callback returning void
>   thermal: kirkwood: Convert to platform remove callback returning void
>   thermal: lvts: Convert to platform remove callback returning void
>   thermal: tsens: Convert to platform remove callback returning void
>   thermal: rcar_gen3: Convert to platform remove callback returning void
>   thermal: rcar: Convert to platform remove callback returning void
>   thermal: rockchip: Convert to platform remove callback returning void
>   thermal: rzg2l: Convert to platform remove callback returning void
>   thermal: exynos_tmu: Convert to platform remove callback returning void
>   thermal: spear: Convert to platform remove callback returning void
>   thermal: sprd: Convert to platform remove callback returning void
>   thermal: stm: Convert to platform remove callback returning void
>   thermal: soctherm: Convert to platform remove callback returning void
>   thermal: tegra-bpmp: Convert to platform remove callback returning void
>   thermal: ti-bandgap: Convert to platform remove callback returning void
>   thermal: uniphier: Convert to platform remove callback returning void
>
>  drivers/thermal/amlogic_thermal.c                    | 12 +++++-------
>  drivers/thermal/armada_thermal.c                     |  6 ++----
>  drivers/thermal/broadcom/bcm2835_thermal.c           |  6 ++----
>  drivers/thermal/broadcom/ns-thermal.c                |  6 ++----
>  drivers/thermal/da9062-thermal.c                     |  5 ++---
>  drivers/thermal/dove_thermal.c                       |  6 ++----
>  drivers/thermal/hisi_thermal.c                       |  6 ++----
>  drivers/thermal/imx8mm_thermal.c                     |  6 ++----
>  drivers/thermal/imx_thermal.c                        |  6 ++----
>  .../thermal/intel/int340x_thermal/int3400_thermal.c  |  5 ++---
>  .../thermal/intel/int340x_thermal/int3401_thermal.c  |  6 ++----
>  .../thermal/intel/int340x_thermal/int3402_thermal.c  |  6 ++----
>  .../thermal/intel/int340x_thermal/int3403_thermal.c  |  6 ++----
>  .../thermal/intel/int340x_thermal/int3406_thermal.c  |  5 ++---
>  drivers/thermal/k3_bandgap.c                         |  6 ++----
>  drivers/thermal/k3_j72xx_bandgap.c                   |  6 ++----
>  drivers/thermal/kirkwood_thermal.c                   |  6 ++----
>  drivers/thermal/mediatek/lvts_thermal.c              |  6 ++----
>  drivers/thermal/qcom/tsens.c                         |  6 ++----
>  drivers/thermal/rcar_gen3_thermal.c                  |  6 ++----
>  drivers/thermal/rcar_thermal.c                       |  6 ++----
>  drivers/thermal/rockchip_thermal.c                   |  6 ++----
>  drivers/thermal/rzg2l_thermal.c                      |  6 ++----
>  drivers/thermal/samsung/exynos_tmu.c                 |  6 ++----
>  drivers/thermal/spear_thermal.c                      |  6 ++----
>  drivers/thermal/sprd_thermal.c                       |  5 ++---
>  drivers/thermal/st/stm_thermal.c                     |  6 ++----
>  drivers/thermal/tegra/soctherm.c                     |  6 ++----
>  drivers/thermal/tegra/tegra-bpmp-thermal.c           |  6 ++----
>  drivers/thermal/ti-soc-thermal/ti-bandgap.c          |  6 ++----
>  drivers/thermal/uniphier_thermal.c                   |  6 ++----
>  31 files changed, 65 insertions(+), 123 deletions(-)
>
> base-commit: 18030226a48de1fbfabf4ae16aaa2695a484254f
> --
> 2.40.1
>

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Re: [PATCH 00/31] thermal: Convert to platform remove callback returning void

[Daniel Lezcano]

On 27/09/2023 21:45, Rafael J. Wysocki wrote:
> Hi,
> 
> On Wed, Sep 27, 2023 at 9:38 PM Uwe Kleine-König
> <u.kleine-koenig@pengutronix.de> wrote:
>>
>> Hello,
>>
>> this series converts all platform drivers below drivers/thermal to use
>> .remove_new(). The motivation is to get rid of an integer return code
>> that is (mostly) ignored by the platform driver core and error prone on
>> the driver side.
>>
>> See commit 5c5a7680e67b ("platform: Provide a remove callback that
>> returns no value") for an extended explanation and the eventual goal.
>>
>> There are no interdependencies between the patches. As there are still
>> quite a few drivers to convert, I'm happy about every patch that makes
>> it in. So even if there is a merge conflict with one patch until you
>> apply or a subject prefix is suboptimal, please apply the remainder of
>> this series anyhow.
> 
> I think I'll go ahead and apply all of this in one go (for 6.7).
> 
> Daniel, any objections?

No objection, for the series:

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>

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<http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

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Re: [PATCH 22/31] thermal: rockchip: Convert to platform remove callback returning void

[Heiko Stuebner]

Am Mittwoch, 27. September 2023, 21:37:27 CEST schrieb Uwe Kleine-König:
> 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: Heiko Stuebner <heiko@sntech.de>



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