[PATCH Re-send] pwm-backlight: Use devm_pwm_get in pwm_bl.c

[PATCH Re-send] pwm-backlight: Use devm_pwm_get in pwm_bl.c

[Sachin Kamat]

This file already makes use of device managed functions.
Convert pwm_get() too to use it.

Cc: Thierry Reding <thierry.reding@avionic-design.de>
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Jingoo Han <jg1.han@samsung.com>
---
 drivers/video/backlight/pwm_bl.c |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
index 4965408..0c91023 100644
--- a/drivers/video/backlight/pwm_bl.c
+++ b/drivers/video/backlight/pwm_bl.c
@@ -218,7 +218,7 @@ static int pwm_backlight_probe(struct platform_device *pdev)
 	pb->exit = data->exit;
 	pb->dev = &pdev->dev;
 
-	pb->pwm = pwm_get(&pdev->dev, NULL);
+	pb->pwm = devm_pwm_get(&pdev->dev, NULL);
 	if (IS_ERR(pb->pwm)) {
 		dev_err(&pdev->dev, "unable to request PWM, trying legacy API\n");
 
@@ -251,7 +251,7 @@ static int pwm_backlight_probe(struct platform_device *pdev)
 	if (IS_ERR(bl)) {
 		dev_err(&pdev->dev, "failed to register backlight\n");
 		ret = PTR_ERR(bl);
-		goto err_bl;
+		goto err_alloc;
 	}
 
 	bl->props.brightness = data->dft_brightness;
@@ -260,8 +260,6 @@ static int pwm_backlight_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, bl);
 	return 0;
 
-err_bl:
-	pwm_put(pb->pwm);
 err_alloc:
 	if (data->exit)
 		data->exit(&pdev->dev);
@@ -276,7 +274,6 @@ static int pwm_backlight_remove(struct platform_device *pdev)
 	backlight_device_unregister(bl);
 	pwm_config(pb->pwm, 0, pb->period);
 	pwm_disable(pb->pwm);
-	pwm_put(pb->pwm);
 	if (pb->exit)
 		pb->exit(&pdev->dev);
 	return 0;
-- 
1.7.4.1

Re: [PATCH Re-send] pwm-backlight: Use devm_pwm_get in pwm_bl.c

[Thierry Reding]

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On Mon, Sep 17, 2012 at 11:50:47AM +0530, Sachin Kamat wrote:
> This file already makes use of device managed functions.
> Convert pwm_get() too to use it.

I find this description a bit confusing. pwm_get() is not converted, but
rather the driver is converted to use devm_pwm_get() instead of
pwm_get().

How about this:

	pwm-backlight: Use devm_pwm_get() instead of pwm_get()

	Managed versions of the pwm_get() and pwm_put() functions were recently
	added to the PWM framework. They can be used to simplify cleanup in the
	error paths and the device removal callback.

If that's okay with you, I can just replace it before pushing so there's
no need for you to resend.

Thierry

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Re: [PATCH Re-send] pwm-backlight: Use devm_pwm_get in pwm_bl.c

[Jingoo Han]

On Monday, September 17, 2012 6:33 PM Thierry Reding wrote
> 
> On Mon, Sep 17, 2012 at 11:50:47AM +0530, Sachin Kamat wrote:
> > This file already makes use of device managed functions.
> > Convert pwm_get() too to use it.
> 
> I find this description a bit confusing. pwm_get() is not converted, but
> rather the driver is converted to use devm_pwm_get() instead of
> pwm_get().
> 
> How about this:
> 
> 	pwm-backlight: Use devm_pwm_get() instead of pwm_get()
> 
> 	Managed versions of the pwm_get() and pwm_put() functions were recently
> 	added to the PWM framework. They can be used to simplify cleanup in the
> 	error paths and the device removal callback.
> 

It looks good.
Sachin, how about you?

Best regards,
Jingoo Han


> If that's okay with you, I can just replace it before pushing so there's
> no need for you to resend.
> 
> Thierry

Re: [PATCH Re-send] pwm-backlight: Use devm_pwm_get in pwm_bl.c

[Sachin Kamat]

On 17 September 2012 15:03, Thierry Reding
<thierry.reding@avionic-design.de> wrote:
> On Mon, Sep 17, 2012 at 11:50:47AM +0530, Sachin Kamat wrote:
>> This file already makes use of device managed functions.
>> Convert pwm_get() too to use it.
>
> I find this description a bit confusing. pwm_get() is not converted, but
> rather the driver is converted to use devm_pwm_get() instead of
> pwm_get().
>
> How about this:
>
>         pwm-backlight: Use devm_pwm_get() instead of pwm_get()
>
>         Managed versions of the pwm_get() and pwm_put() functions were recently
>         added to the PWM framework. They can be used to simplify cleanup in the
>         error paths and the device removal callback.
>
> If that's okay with you, I can just replace it before pushing so there's
> no need for you to resend.

Your description sounds good. Please go ahead with it.
Thanks

>
> Thierry



-- 
With warm regards,
Sachin