[PATCH v4 02/21] thermal/drivers/sun8i: convert to use devm_request*_irq_probe()

[PATCH v4 02/21] thermal/drivers/sun8i: convert to use devm_request*_irq_probe()

[Yangtao Li]

There are more than 700 calls to devm_request_threaded_irq method and
more than 1000 calls to devm_request_irq method. Most drivers only
request one interrupt resource, and these error messages are basically
the same. If error messages are printed everywhere, more than 2000 lines
of code can be saved by removing the msg in the driver.

And tglx point out that:

  If we actually look at the call sites of
  devm_request_threaded_irq() then the vast majority of them print more or
  less lousy error messages. A quick grep/sed/awk/sort/uniq revealed

     519 messages total (there are probably more)

     352 unique messages

     323 unique messages after lower casing

         Those 323 are mostly just variants of the same patterns with
         slight modifications in formatting and information provided.

     186 of these messages do not deliver any useful information,
         e.g. "no irq", "

     The most useful one of all is: "could request wakeup irq: %d"

  So there is certainly an argument to be made that this particular
  function should print a well formatted and informative error message.

  It's not a general allocator like kmalloc(). It's specialized and in the
  vast majority of cases failing to request the interrupt causes the
  device probe to fail. So having proper and consistent information why
  the device cannot be used _is_ useful.

So convert to use devm_request*_irq_probe() API, which ensure that all
error handling branches print error information.

In this way, when this function fails, the upper-layer functions can
directly return an error code without missing debugging information.
Otherwise, the error message will be printed redundantly or missing.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 drivers/thermal/sun8i_thermal.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
index 195f3c5d0b38..a952804ff993 100644
--- a/drivers/thermal/sun8i_thermal.c
+++ b/drivers/thermal/sun8i_thermal.c
@@ -512,9 +512,9 @@ static int sun8i_ths_probe(struct platform_device *pdev)
 	 * registered yet, we deffer the registration of the interrupt to
 	 * the end.
 	 */
-	ret = devm_request_threaded_irq(dev, irq, NULL,
-					sun8i_irq_thread,
-					IRQF_ONESHOT, "ths", tmdev);
+	ret = devm_request_threaded_irq_probe(dev, irq, NULL,
+					      sun8i_irq_thread,
+					      IRQF_ONESHOT, "ths", tmdev, NULL);
 	if (ret)
 		return ret;
 
-- 
2.39.0


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Re: [PATCH v4 02/21] thermal/drivers/sun8i: convert to use devm_request*_irq_probe()

[Jernej Škrabec]

Dne ponedeljek, 10. julij 2023 ob 11:59:06 CEST je Yangtao Li napisal(a):
> There are more than 700 calls to devm_request_threaded_irq method and
> more than 1000 calls to devm_request_irq method. Most drivers only
> request one interrupt resource, and these error messages are basically
> the same. If error messages are printed everywhere, more than 2000 lines
> of code can be saved by removing the msg in the driver.
> 
> And tglx point out that:
> 
>   If we actually look at the call sites of
>   devm_request_threaded_irq() then the vast majority of them print more or
>   less lousy error messages. A quick grep/sed/awk/sort/uniq revealed
> 
>      519 messages total (there are probably more)
> 
>      352 unique messages
> 
>      323 unique messages after lower casing
> 
>          Those 323 are mostly just variants of the same patterns with
>          slight modifications in formatting and information provided.
> 
>      186 of these messages do not deliver any useful information,
>          e.g. "no irq", "
> 
>      The most useful one of all is: "could request wakeup irq: %d"
> 
>   So there is certainly an argument to be made that this particular
>   function should print a well formatted and informative error message.
> 
>   It's not a general allocator like kmalloc(). It's specialized and in the
>   vast majority of cases failing to request the interrupt causes the
>   device probe to fail. So having proper and consistent information why
>   the device cannot be used _is_ useful.
> 
> So convert to use devm_request*_irq_probe() API, which ensure that all
> error handling branches print error information.
> 
> In this way, when this function fails, the upper-layer functions can
> directly return an error code without missing debugging information.
> Otherwise, the error message will be printed redundantly or missing.
> 
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Krzysztof Kozlowski <krzk@kernel.org>
> Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
> Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
> Cc: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
> Signed-off-by: Yangtao Li <frank.li@vivo.com>
> ---

Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Best regards,
Jernej

>  drivers/thermal/sun8i_thermal.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
> index 195f3c5d0b38..a952804ff993 100644
> --- a/drivers/thermal/sun8i_thermal.c
> +++ b/drivers/thermal/sun8i_thermal.c
> @@ -512,9 +512,9 @@ static int sun8i_ths_probe(struct platform_device *pdev)
>  	 * registered yet, we deffer the registration of the interrupt to
>  	 * the end.
>  	 */
> -	ret = devm_request_threaded_irq(dev, irq, NULL,
> -					sun8i_irq_thread,
> -					IRQF_ONESHOT, "ths", tmdev);
> +	ret = devm_request_threaded_irq_probe(dev, irq, NULL,
> +					      sun8i_irq_thread,
> +					      IRQF_ONESHOT, "ths", tmdev, NULL);
>  	if (ret)
>  		return ret;
>  
> 





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[PATCH v4 04/21] thermal/drivers/broadcom: convert to use devm_request*_irq_probe()

[Yangtao Li]

There are more than 700 calls to devm_request_threaded_irq method and
more than 1000 calls to devm_request_irq method. Most drivers only
request one interrupt resource, and these error messages are basically
the same. If error messages are printed everywhere, more than 2000 lines
of code can be saved by removing the msg in the driver.

And tglx point out that:

  If we actually look at the call sites of
  devm_request_threaded_irq() then the vast majority of them print more or
  less lousy error messages. A quick grep/sed/awk/sort/uniq revealed

     519 messages total (there are probably more)

     352 unique messages

     323 unique messages after lower casing

         Those 323 are mostly just variants of the same patterns with
         slight modifications in formatting and information provided.

     186 of these messages do not deliver any useful information,
         e.g. "no irq", "

     The most useful one of all is: "could request wakeup irq: %d"

  So there is certainly an argument to be made that this particular
  function should print a well formatted and informative error message.

  It's not a general allocator like kmalloc(). It's specialized and in the
  vast majority of cases failing to request the interrupt causes the
  device probe to fail. So having proper and consistent information why
  the device cannot be used _is_ useful.

So convert to use devm_request*_irq_probe() API, which ensure that all
error handling branches print error information.

In this way, when this function fails, the upper-layer functions can
directly return an error code without missing debugging information.
Otherwise, the error message will be printed redundantly or missing.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 drivers/thermal/broadcom/brcmstb_thermal.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/thermal/broadcom/brcmstb_thermal.c b/drivers/thermal/broadcom/brcmstb_thermal.c
index 72d1dbe60b8f..ea37e7ee688a 100644
--- a/drivers/thermal/broadcom/brcmstb_thermal.c
+++ b/drivers/thermal/broadcom/brcmstb_thermal.c
@@ -349,14 +349,12 @@ static int brcmstb_thermal_probe(struct platform_device *pdev)
 
 	irq = platform_get_irq_optional(pdev, 0);
 	if (irq >= 0) {
-		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
-						brcmstb_tmon_irq_thread,
-						IRQF_ONESHOT,
-						DRV_NAME, priv);
-		if (ret < 0) {
-			dev_err(&pdev->dev, "could not request IRQ: %d\n", ret);
+		ret = devm_request_threaded_irq_probe(&pdev->dev, irq, NULL,
+						      brcmstb_tmon_irq_thread,
+						      IRQF_ONESHOT,
+						      DRV_NAME, priv, NULL);
+		if (ret < 0)
 			return ret;
-		}
 	}
 
 	dev_info(&pdev->dev, "registered AVS TMON of-sensor driver\n");
-- 
2.39.0


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[PATCH v4 10/21] thermal/drivers/exynos: convert to use devm_request*_irq_probe()

[Yangtao Li]

There are more than 700 calls to devm_request_threaded_irq method and
more than 1000 calls to devm_request_irq method. Most drivers only
request one interrupt resource, and these error messages are basically
the same. If error messages are printed everywhere, more than 2000 lines
of code can be saved by removing the msg in the driver.

And tglx point out that:

  If we actually look at the call sites of
  devm_request_threaded_irq() then the vast majority of them print more or
  less lousy error messages. A quick grep/sed/awk/sort/uniq revealed

     519 messages total (there are probably more)

     352 unique messages

     323 unique messages after lower casing

         Those 323 are mostly just variants of the same patterns with
         slight modifications in formatting and information provided.

     186 of these messages do not deliver any useful information,
         e.g. "no irq", "

     The most useful one of all is: "could request wakeup irq: %d"

  So there is certainly an argument to be made that this particular
  function should print a well formatted and informative error message.

  It's not a general allocator like kmalloc(). It's specialized and in the
  vast majority of cases failing to request the interrupt causes the
  device probe to fail. So having proper and consistent information why
  the device cannot be used _is_ useful.

So convert to use devm_request*_irq_probe() API, which ensure that all
error handling branches print error information.

In this way, when this function fails, the upper-layer functions can
directly return an error code without missing debugging information.
Otherwise, the error message will be printed redundantly or missing.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 drivers/thermal/samsung/exynos_tmu.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index 45e5c840d130..697d2fbdb1bf 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -1100,12 +1100,11 @@ static int exynos_tmu_probe(struct platform_device *pdev)
 		goto err_sclk;
 	}
 
-	ret = devm_request_irq(&pdev->dev, data->irq, exynos_tmu_irq,
-		IRQF_TRIGGER_RISING | IRQF_SHARED, dev_name(&pdev->dev), data);
-	if (ret) {
-		dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
+	ret = devm_request_irq_probe(&pdev->dev, data->irq, exynos_tmu_irq,
+				     IRQF_TRIGGER_RISING | IRQF_SHARED,
+				     dev_name(&pdev->dev), data, NULL);
+	if (ret)
 		goto err_sclk;
-	}
 
 	exynos_tmu_control(pdev, true);
 	return 0;
-- 
2.39.0


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Re: [PATCH v4 10/21] thermal/drivers/exynos: convert to use devm_request*_irq_probe()

[Krzysztof Kozlowski]

On 10/07/2023 11:59, Yangtao Li wrote:
> There are more than 700 calls to devm_request_threaded_irq method and
> more than 1000 calls to devm_request_irq method. Most drivers only
> request one interrupt resource, and these error messages are basically
> the same. If error messages are printed everywhere, more than 2000 lines
> of code can be saved by removing the msg in the driver.
> 
> And tglx point out that:
> 
>   If we actually look at the call sites of
>   devm_request_threaded_irq() then the vast majority of them print more or
>   less lousy error messages. A quick grep/sed/awk/sort/uniq revealed
> 
>      519 messages total (there are probably more)
> 
>      352 unique messages
> 
>      323 unique messages after lower casing
> 
>          Those 323 are mostly just variants of the same patterns with
>          slight modifications in formatting and information provided.
> 
>      186 of these messages do not deliver any useful information,
>          e.g. "no irq", "
> 
>      The most useful one of all is: "could request wakeup irq: %d"
> 
>   So there is certainly an argument to be made that this particular
>   function should print a well formatted and informative error message.
> 
>   It's not a general allocator like kmalloc(). It's specialized and in the
>   vast majority of cases failing to request the interrupt causes the
>   device probe to fail. So having proper and consistent information why
>   the device cannot be used _is_ useful.
> 
> So convert to use devm_request*_irq_probe() API, which ensure that all
> error handling branches print error information.
> 
> In this way, when this function fails, the upper-layer functions can
> directly return an error code without missing debugging information.
> Otherwise, the error message will be printed redundantly or missing.
> 
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Krzysztof Kozlowski <krzk@kernel.org>
> Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
> Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
> Cc: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
> Signed-off-by: Yangtao Li <frank.li@vivo.com>
> ---


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof


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[PATCH v4 12/21] thermal/drivers/rockchip: convert to use devm_request*_irq_probe()

[Yangtao Li]

There are more than 700 calls to devm_request_threaded_irq method and
more than 1000 calls to devm_request_irq method. Most drivers only
request one interrupt resource, and these error messages are basically
the same. If error messages are printed everywhere, more than 2000 lines
of code can be saved by removing the msg in the driver.

And tglx point out that:

  If we actually look at the call sites of
  devm_request_threaded_irq() then the vast majority of them print more or
  less lousy error messages. A quick grep/sed/awk/sort/uniq revealed

     519 messages total (there are probably more)

     352 unique messages

     323 unique messages after lower casing

         Those 323 are mostly just variants of the same patterns with
         slight modifications in formatting and information provided.

     186 of these messages do not deliver any useful information,
         e.g. "no irq", "

     The most useful one of all is: "could request wakeup irq: %d"

  So there is certainly an argument to be made that this particular
  function should print a well formatted and informative error message.

  It's not a general allocator like kmalloc(). It's specialized and in the
  vast majority of cases failing to request the interrupt causes the
  device probe to fail. So having proper and consistent information why
  the device cannot be used _is_ useful.

So convert to use devm_request*_irq_probe() API, which ensure that all
error handling branches print error information.

In this way, when this function fails, the upper-layer functions can
directly return an error code without missing debugging information.
Otherwise, the error message will be printed redundantly or missing.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 drivers/thermal/rockchip_thermal.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
index 77231a9d28ff..11061f6ef323 100644
--- a/drivers/thermal/rockchip_thermal.c
+++ b/drivers/thermal/rockchip_thermal.c
@@ -1577,13 +1577,12 @@ static int rockchip_thermal_probe(struct platform_device *pdev)
 				"failed to register sensor[%d].\n", i);
 	}
 
-	error = devm_request_threaded_irq(&pdev->dev, irq, NULL,
-					  &rockchip_thermal_alarm_irq_thread,
-					  IRQF_ONESHOT,
-					  "rockchip_thermal", thermal);
+	error = devm_request_threaded_irq_probe(&pdev->dev, irq, NULL,
+						&rockchip_thermal_alarm_irq_thread,
+						IRQF_ONESHOT,
+						"rockchip_thermal", thermal, "tsadc");
 	if (error)
-		return dev_err_probe(&pdev->dev, error,
-				     "failed to request tsadc irq.\n");
+		return error;
 
 	thermal->chip->control(thermal->regs, true);
 
-- 
2.39.0


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Re: [PATCH v4 12/21] thermal/drivers/rockchip: convert to use devm_request*_irq_probe()

[Heiko Stuebner]

Am Montag, 10. Juli 2023, 11:59:16 CEST schrieb Yangtao Li:
> There are more than 700 calls to devm_request_threaded_irq method and
> more than 1000 calls to devm_request_irq method. Most drivers only
> request one interrupt resource, and these error messages are basically
> the same. If error messages are printed everywhere, more than 2000 lines
> of code can be saved by removing the msg in the driver.
> 
> And tglx point out that:
> 
>   If we actually look at the call sites of
>   devm_request_threaded_irq() then the vast majority of them print more or
>   less lousy error messages. A quick grep/sed/awk/sort/uniq revealed
> 
>      519 messages total (there are probably more)
> 
>      352 unique messages
> 
>      323 unique messages after lower casing
> 
>          Those 323 are mostly just variants of the same patterns with
>          slight modifications in formatting and information provided.
> 
>      186 of these messages do not deliver any useful information,
>          e.g. "no irq", "
> 
>      The most useful one of all is: "could request wakeup irq: %d"
> 
>   So there is certainly an argument to be made that this particular
>   function should print a well formatted and informative error message.
> 
>   It's not a general allocator like kmalloc(). It's specialized and in the
>   vast majority of cases failing to request the interrupt causes the
>   device probe to fail. So having proper and consistent information why
>   the device cannot be used _is_ useful.
> 
> So convert to use devm_request*_irq_probe() API, which ensure that all
> error handling branches print error information.
> 
> In this way, when this function fails, the upper-layer functions can
> directly return an error code without missing debugging information.
> Otherwise, the error message will be printed redundantly or missing.
> 
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Krzysztof Kozlowski <krzk@kernel.org>
> Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
> Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
> Cc: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
> Signed-off-by: Yangtao Li <frank.li@vivo.com>

Acked-by: Heiko Stuebner <heiko@sntech.de>



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[PATCH v4 14/21] thermal/drivers/mediatek/lvts_thermal: convert to use devm_request*_irq_probe()

[Yangtao Li]

There are more than 700 calls to devm_request_threaded_irq method and
more than 1000 calls to devm_request_irq method. Most drivers only
request one interrupt resource, and these error messages are basically
the same. If error messages are printed everywhere, more than 2000 lines
of code can be saved by removing the msg in the driver.

And tglx point out that:

  If we actually look at the call sites of
  devm_request_threaded_irq() then the vast majority of them print more or
  less lousy error messages. A quick grep/sed/awk/sort/uniq revealed

     519 messages total (there are probably more)

     352 unique messages

     323 unique messages after lower casing

         Those 323 are mostly just variants of the same patterns with
         slight modifications in formatting and information provided.

     186 of these messages do not deliver any useful information,
         e.g. "no irq", "

     The most useful one of all is: "could request wakeup irq: %d"

  So there is certainly an argument to be made that this particular
  function should print a well formatted and informative error message.

  It's not a general allocator like kmalloc(). It's specialized and in the
  vast majority of cases failing to request the interrupt causes the
  device probe to fail. So having proper and consistent information why
  the device cannot be used _is_ useful.

So convert to use devm_request*_irq_probe() API, which ensure that all
error handling branches print error information.

In this way, when this function fails, the upper-layer functions can
directly return an error code without missing debugging information.
Otherwise, the error message will be printed redundantly or missing.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 drivers/thermal/mediatek/lvts_thermal.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/mediatek/lvts_thermal.c b/drivers/thermal/mediatek/lvts_thermal.c
index b693fac2d677..1e12410820df 100644
--- a/drivers/thermal/mediatek/lvts_thermal.c
+++ b/drivers/thermal/mediatek/lvts_thermal.c
@@ -1148,10 +1148,10 @@ static int lvts_probe(struct platform_device *pdev)
 	 * At this point the LVTS is initialized and enabled. We can
 	 * safely enable the interrupt.
 	 */
-	ret = devm_request_threaded_irq(dev, irq, NULL, lvts_irq_handler,
-					IRQF_ONESHOT, dev_name(dev), lvts_td);
+	ret = devm_request_threaded_irq_probe(dev, irq, NULL, lvts_irq_handler,
+					      IRQF_ONESHOT, dev_name(dev), lvts_td, NULL);
 	if (ret)
-		return dev_err_probe(dev, ret, "Failed to request interrupt\n");
+		return ret;
 
 	platform_set_drvdata(pdev, lvts_td);
 
-- 
2.39.0


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Re: [PATCH v4 14/21] thermal/drivers/mediatek/lvts_thermal: convert to use devm_request*_irq_probe()

[AngeloGioacchino Del Regno]

Il 10/07/23 11:59, Yangtao Li ha scritto:
> There are more than 700 calls to devm_request_threaded_irq method and
> more than 1000 calls to devm_request_irq method. Most drivers only
> request one interrupt resource, and these error messages are basically
> the same. If error messages are printed everywhere, more than 2000 lines
> of code can be saved by removing the msg in the driver.
> 
> And tglx point out that:
> 
>    If we actually look at the call sites of
>    devm_request_threaded_irq() then the vast majority of them print more or
>    less lousy error messages. A quick grep/sed/awk/sort/uniq revealed
> 
>       519 messages total (there are probably more)
> 
>       352 unique messages
> 
>       323 unique messages after lower casing
> 
>           Those 323 are mostly just variants of the same patterns with
>           slight modifications in formatting and information provided.
> 
>       186 of these messages do not deliver any useful information,
>           e.g. "no irq", "
> 
>       The most useful one of all is: "could request wakeup irq: %d"
> 
>    So there is certainly an argument to be made that this particular
>    function should print a well formatted and informative error message.
> 
>    It's not a general allocator like kmalloc(). It's specialized and in the
>    vast majority of cases failing to request the interrupt causes the
>    device probe to fail. So having proper and consistent information why
>    the device cannot be used _is_ useful.
> 
> So convert to use devm_request*_irq_probe() API, which ensure that all
> error handling branches print error information.
> 
> In this way, when this function fails, the upper-layer functions can
> directly return an error code without missing debugging information.
> Otherwise, the error message will be printed redundantly or missing.
> 
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Krzysztof Kozlowski <krzk@kernel.org>
> Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
> Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
> Cc: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
> Signed-off-by: Yangtao Li <frank.li@vivo.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>



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[PATCH v4 17/21] thermal/drivers/stm: convert to use devm_request*_irq_probe()

[Yangtao Li]

There are more than 700 calls to devm_request_threaded_irq method and
more than 1000 calls to devm_request_irq method. Most drivers only
request one interrupt resource, and these error messages are basically
the same. If error messages are printed everywhere, more than 2000 lines
of code can be saved by removing the msg in the driver.

And tglx point out that:

  If we actually look at the call sites of
  devm_request_threaded_irq() then the vast majority of them print more or
  less lousy error messages. A quick grep/sed/awk/sort/uniq revealed

     519 messages total (there are probably more)

     352 unique messages

     323 unique messages after lower casing

         Those 323 are mostly just variants of the same patterns with
         slight modifications in formatting and information provided.

     186 of these messages do not deliver any useful information,
         e.g. "no irq", "

     The most useful one of all is: "could request wakeup irq: %d"

  So there is certainly an argument to be made that this particular
  function should print a well formatted and informative error message.

  It's not a general allocator like kmalloc(). It's specialized and in the
  vast majority of cases failing to request the interrupt causes the
  device probe to fail. So having proper and consistent information why
  the device cannot be used _is_ useful.

So convert to use devm_request*_irq_probe() API, which ensure that all
error handling branches print error information.

In this way, when this function fails, the upper-layer functions can
directly return an error code without missing debugging information.
Otherwise, the error message will be printed redundantly or missing.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 drivers/thermal/st/st_thermal_memmap.c | 12 +++++-------
 drivers/thermal/st/stm_thermal.c       | 13 ++++---------
 2 files changed, 9 insertions(+), 16 deletions(-)

diff --git a/drivers/thermal/st/st_thermal_memmap.c b/drivers/thermal/st/st_thermal_memmap.c
index e8cfa83b724a..40bb318b5489 100644
--- a/drivers/thermal/st/st_thermal_memmap.c
+++ b/drivers/thermal/st/st_thermal_memmap.c
@@ -97,14 +97,12 @@ static int st_mmap_register_enable_irq(struct st_thermal_sensor *sensor)
 	if (sensor->irq < 0)
 		return sensor->irq;
 
-	ret = devm_request_threaded_irq(dev, sensor->irq,
-					NULL, st_mmap_thermal_trip_handler,
-					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
-					dev->driver->name, sensor);
-	if (ret) {
-		dev_err(dev, "failed to register IRQ %d\n", sensor->irq);
+	ret = devm_request_threaded_irq_probe(dev, sensor->irq,
+					      NULL, st_mmap_thermal_trip_handler,
+					      IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					      dev->driver->name, sensor, NULL);
+	if (ret)
 		return ret;
-	}
 
 	return st_mmap_enable_irq(sensor);
 }
diff --git a/drivers/thermal/st/stm_thermal.c b/drivers/thermal/st/stm_thermal.c
index 903fcf1763f1..6a36a7eab9bd 100644
--- a/drivers/thermal/st/stm_thermal.c
+++ b/drivers/thermal/st/stm_thermal.c
@@ -387,16 +387,11 @@ static int stm_register_irq(struct stm_thermal_sensor *sensor)
 	if (sensor->irq < 0)
 		return sensor->irq;
 
-	ret = devm_request_threaded_irq(dev, sensor->irq,
-					NULL,
-					stm_thermal_irq_handler,
-					IRQF_ONESHOT,
-					dev->driver->name, sensor);
-	if (ret) {
-		dev_err(dev, "%s: Failed to register IRQ %d\n", __func__,
-			sensor->irq);
+	ret = devm_request_threaded_irq_probe(dev, sensor->irq, NULL,
+					      stm_thermal_irq_handler, IRQF_ONESHOT,
+					      dev->driver->name, sensor, NULL);
+	if (ret)
 		return ret;
-	}
 
 	dev_dbg(dev, "%s: thermal IRQ registered", __func__);
 
-- 
2.39.0


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[PATCH v4 20/21] thermal/drivers/uniphier: convert to use devm_request*_irq_probe()

[Yangtao Li]

There are more than 700 calls to devm_request_threaded_irq method and
more than 1000 calls to devm_request_irq method. Most drivers only
request one interrupt resource, and these error messages are basically
the same. If error messages are printed everywhere, more than 2000 lines
of code can be saved by removing the msg in the driver.

And tglx point out that:

  If we actually look at the call sites of
  devm_request_threaded_irq() then the vast majority of them print more or
  less lousy error messages. A quick grep/sed/awk/sort/uniq revealed

     519 messages total (there are probably more)

     352 unique messages

     323 unique messages after lower casing

         Those 323 are mostly just variants of the same patterns with
         slight modifications in formatting and information provided.

     186 of these messages do not deliver any useful information,
         e.g. "no irq", "

     The most useful one of all is: "could request wakeup irq: %d"

  So there is certainly an argument to be made that this particular
  function should print a well formatted and informative error message.

  It's not a general allocator like kmalloc(). It's specialized and in the
  vast majority of cases failing to request the interrupt causes the
  device probe to fail. So having proper and consistent information why
  the device cannot be used _is_ useful.

So convert to use devm_request*_irq_probe() API, which ensure that all
error handling branches print error information.

In this way, when this function fails, the upper-layer functions can
directly return an error code without missing debugging information.
Otherwise, the error message will be printed redundantly or missing.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 drivers/thermal/uniphier_thermal.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/thermal/uniphier_thermal.c b/drivers/thermal/uniphier_thermal.c
index aef6119cc004..34d8eb2138d3 100644
--- a/drivers/thermal/uniphier_thermal.c
+++ b/drivers/thermal/uniphier_thermal.c
@@ -278,9 +278,9 @@ static int uniphier_tm_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = devm_request_threaded_irq(dev, irq, uniphier_tm_alarm_irq,
-					uniphier_tm_alarm_irq_thread,
-					0, "thermal", tdev);
+	ret = devm_request_threaded_irq_probe(dev, irq, uniphier_tm_alarm_irq,
+					      uniphier_tm_alarm_irq_thread,
+					      0, "thermal", tdev, NULL);
 	if (ret)
 		return ret;
 
-- 
2.39.0


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[PATCH v4 21/21] thermal/drivers/imx: convert to use devm_request*_irq_probe()

[Yangtao Li]

There are more than 700 calls to devm_request_threaded_irq method and
more than 1000 calls to devm_request_irq method. Most drivers only
request one interrupt resource, and these error messages are basically
the same. If error messages are printed everywhere, more than 2000 lines
of code can be saved by removing the msg in the driver.

And tglx point out that:

  If we actually look at the call sites of
  devm_request_threaded_irq() then the vast majority of them print more or
  less lousy error messages. A quick grep/sed/awk/sort/uniq revealed

     519 messages total (there are probably more)

     352 unique messages

     323 unique messages after lower casing

         Those 323 are mostly just variants of the same patterns with
         slight modifications in formatting and information provided.

     186 of these messages do not deliver any useful information,
         e.g. "no irq", "

     The most useful one of all is: "could request wakeup irq: %d"

  So there is certainly an argument to be made that this particular
  function should print a well formatted and informative error message.

  It's not a general allocator like kmalloc(). It's specialized and in the
  vast majority of cases failing to request the interrupt causes the
  device probe to fail. So having proper and consistent information why
  the device cannot be used _is_ useful.

So convert to use devm_request*_irq_probe() API, which ensure that all
error handling branches print error information.

In this way, when this function fails, the upper-layer functions can
directly return an error code without missing debugging information.
Otherwise, the error message will be printed redundantly or missing.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Krzysztof Kozlowski <krzk@kernel.org>
Cc: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Jonathan Cameron <Jonathan.Cameron@Huawei.com>
Cc: AngeloGioacchino Del Regno  <angelogioacchino.delregno@collabora.com>
Signed-off-by: Yangtao Li <frank.li@vivo.com>
---
 drivers/thermal/imx_thermal.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c
index a94ec0a0c9dd..3131a09f9906 100644
--- a/drivers/thermal/imx_thermal.c
+++ b/drivers/thermal/imx_thermal.c
@@ -746,13 +746,12 @@ static int imx_thermal_probe(struct platform_device *pdev)
 	if (ret)
 		goto thermal_zone_unregister;
 
-	ret = devm_request_threaded_irq(&pdev->dev, data->irq,
-			imx_thermal_alarm_irq, imx_thermal_alarm_irq_thread,
-			0, "imx_thermal", data);
-	if (ret < 0) {
-		dev_err(&pdev->dev, "failed to request alarm irq: %d\n", ret);
+	ret = devm_request_threaded_irq_probe(&pdev->dev, data->irq,
+					      imx_thermal_alarm_irq,
+					      imx_thermal_alarm_irq_thread,
+					      0, "imx_thermal", data, "alarm");
+	if (ret < 0)
 		goto thermal_zone_unregister;
-	}
 
 	pm_runtime_put(data->dev);
 
-- 
2.39.0


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