diff mbox

[4/9] backlight: atmel-pwm-bl: clean up probe error handling

Message ID 1382522143-32072-5-git-send-email-jhovold@gmail.com (mailing list archive)
State New, archived
Headers show

Commit Message

Johan Hovold Oct. 23, 2013, 9:55 a.m. UTC 
Clean up probe error handling by checking parameters before any
allocations and removing an obsolete error label. Also remove
unnecessary reset of private gpio number.

Acked-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Johan Hovold <jhovold@gmail.com>
---
 drivers/video/backlight/atmel-pwm-bl.c | 31 ++++++++++++-------------------
 1 file changed, 12 insertions(+), 19 deletions(-)

Comments

Jean-Christophe PLAGNIOL-VILLARD Oct. 25, 2013, 11:11 a.m. UTC | #1 
On 11:55 Wed 23 Oct     , Johan Hovold wrote:
> Clean up probe error handling by checking parameters before any
> allocations and removing an obsolete error label. Also remove
> unnecessary reset of private gpio number.
> 
> Acked-by: Jingoo Han <jg1.han@samsung.com>
> Signed-off-by: Johan Hovold <jhovold@gmail.com>
> ---
>  drivers/video/backlight/atmel-pwm-bl.c | 31 ++++++++++++-------------------
>  1 file changed, 12 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c
> index cc5a5ed..52a8134 100644
> --- a/drivers/video/backlight/atmel-pwm-bl.c
> +++ b/drivers/video/backlight/atmel-pwm-bl.c
> @@ -126,40 +126,33 @@ static int atmel_pwm_bl_probe(struct platform_device *pdev)
>  	struct atmel_pwm_bl *pwmbl;
>  	int retval;
>  
> +	pdata = dev_get_platdata(&pdev->dev);
> +	if (!pdata)
> +		return -ENODEV;
> +
> +	if (pdata->pwm_compare_max < pdata->pwm_duty_max ||
> +			pdata->pwm_duty_min > pdata->pwm_duty_max ||
> +			pdata->pwm_frequency == 0)
> +		return -EINVAL;
> +
>  	pwmbl = devm_kzalloc(&pdev->dev, sizeof(struct atmel_pwm_bl),
>  				GFP_KERNEL);
>  	if (!pwmbl)
>  		return -ENOMEM;
>  
>  	pwmbl->pdev = pdev;
> -
> -	pdata = dev_get_platdata(&pdev->dev);
> -	if (!pdata) {
> -		retval = -ENODEV;
> -		goto err_free_mem;
> -	}
> -
> -	if (pdata->pwm_compare_max < pdata->pwm_duty_max ||
> -			pdata->pwm_duty_min > pdata->pwm_duty_max ||
> -			pdata->pwm_frequency == 0) {
> -		retval = -EINVAL;
> -		goto err_free_mem;
> -	}
> -
>  	pwmbl->pdata = pdata;
>  	pwmbl->gpio_on = pdata->gpio_on;
>  
>  	retval = pwm_channel_alloc(pdata->pwm_channel, &pwmbl->pwmc);
>  	if (retval)
> -		goto err_free_mem;
> +		return retval;
>  
>  	if (pwmbl->gpio_on != -1) {
gpio_is_valid here
>  		retval = devm_gpio_request(&pdev->dev, pwmbl->gpio_on,
>  					"gpio_atmel_pwm_bl");
> -		if (retval) {
> -			pwmbl->gpio_on = -1;
> +		if (retval)
>  			goto err_free_pwm;
> -		}
>  
>  		/* Turn display off by default. */
>  		retval = gpio_direction_output(pwmbl->gpio_on,
> @@ -197,7 +190,7 @@ static int atmel_pwm_bl_probe(struct platform_device *pdev)
>  
>  err_free_pwm:
>  	pwm_channel_free(&pwmbl->pwmc);
> -err_free_mem:
> +
>  	return retval;
>  }
>  
> -- 
> 1.8.4
> 
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Johan Hovold Oct. 29, 2013, 1:09 p.m. UTC | #2 
On Fri, Oct 25, 2013 at 01:11:25PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 11:55 Wed 23 Oct     , Johan Hovold wrote:
> > Clean up probe error handling by checking parameters before any
> > allocations and removing an obsolete error label. Also remove
> > unnecessary reset of private gpio number.
> > 
> > Acked-by: Jingoo Han <jg1.han@samsung.com>
> > Signed-off-by: Johan Hovold <jhovold@gmail.com>
> > ---
> >  drivers/video/backlight/atmel-pwm-bl.c | 31 ++++++++++++-------------------
> >  1 file changed, 12 insertions(+), 19 deletions(-)
> > 
> > diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c
> > index cc5a5ed..52a8134 100644
> > --- a/drivers/video/backlight/atmel-pwm-bl.c
> > +++ b/drivers/video/backlight/atmel-pwm-bl.c
> > @@ -126,40 +126,33 @@ static int atmel_pwm_bl_probe(struct platform_device *pdev)
> >  	struct atmel_pwm_bl *pwmbl;
> >  	int retval;
> >  
> > +	pdata = dev_get_platdata(&pdev->dev);
> > +	if (!pdata)
> > +		return -ENODEV;
> > +
> > +	if (pdata->pwm_compare_max < pdata->pwm_duty_max ||
> > +			pdata->pwm_duty_min > pdata->pwm_duty_max ||
> > +			pdata->pwm_frequency == 0)
> > +		return -EINVAL;
> > +
> >  	pwmbl = devm_kzalloc(&pdev->dev, sizeof(struct atmel_pwm_bl),
> >  				GFP_KERNEL);
> >  	if (!pwmbl)
> >  		return -ENOMEM;
> >  
> >  	pwmbl->pdev = pdev;
> > -
> > -	pdata = dev_get_platdata(&pdev->dev);
> > -	if (!pdata) {
> > -		retval = -ENODEV;
> > -		goto err_free_mem;
> > -	}
> > -
> > -	if (pdata->pwm_compare_max < pdata->pwm_duty_max ||
> > -			pdata->pwm_duty_min > pdata->pwm_duty_max ||
> > -			pdata->pwm_frequency == 0) {
> > -		retval = -EINVAL;
> > -		goto err_free_mem;
> > -	}
> > -
> >  	pwmbl->pdata = pdata;
> >  	pwmbl->gpio_on = pdata->gpio_on;
> >  
> >  	retval = pwm_channel_alloc(pdata->pwm_channel, &pwmbl->pwmc);
> >  	if (retval)
> > -		goto err_free_mem;
> > +		return retval;
> >  
> >  	if (pwmbl->gpio_on != -1) {
> gpio_is_valid here

Again, this is unrelated to this patch and is fixed separately in patch
7/9.

Johan

> >  		retval = devm_gpio_request(&pdev->dev, pwmbl->gpio_on,
> >  					"gpio_atmel_pwm_bl");
> > -		if (retval) {
> > -			pwmbl->gpio_on = -1;
> > +		if (retval)
> >  			goto err_free_pwm;
> > -		}
> >  
> >  		/* Turn display off by default. */
> >  		retval = gpio_direction_output(pwmbl->gpio_on,
> > @@ -197,7 +190,7 @@ static int atmel_pwm_bl_probe(struct platform_device *pdev)
> >  
> >  err_free_pwm:
> >  	pwm_channel_free(&pwmbl->pwmc);
> > -err_free_mem:
> > +
> >  	return retval;
> >  }
> >  
> > -- 
> > 1.8.4
> > 
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diff mbox

Patch

diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c
index cc5a5ed..52a8134 100644
--- a/drivers/video/backlight/atmel-pwm-bl.c
+++ b/drivers/video/backlight/atmel-pwm-bl.c
@@ -126,40 +126,33 @@  static int atmel_pwm_bl_probe(struct platform_device *pdev)
 	struct atmel_pwm_bl *pwmbl;
 	int retval;
 
+	pdata = dev_get_platdata(&pdev->dev);
+	if (!pdata)
+		return -ENODEV;
+
+	if (pdata->pwm_compare_max < pdata->pwm_duty_max ||
+			pdata->pwm_duty_min > pdata->pwm_duty_max ||
+			pdata->pwm_frequency == 0)
+		return -EINVAL;
+
 	pwmbl = devm_kzalloc(&pdev->dev, sizeof(struct atmel_pwm_bl),
 				GFP_KERNEL);
 	if (!pwmbl)
 		return -ENOMEM;
 
 	pwmbl->pdev = pdev;
-
-	pdata = dev_get_platdata(&pdev->dev);
-	if (!pdata) {
-		retval = -ENODEV;
-		goto err_free_mem;
-	}
-
-	if (pdata->pwm_compare_max < pdata->pwm_duty_max ||
-			pdata->pwm_duty_min > pdata->pwm_duty_max ||
-			pdata->pwm_frequency == 0) {
-		retval = -EINVAL;
-		goto err_free_mem;
-	}
-
 	pwmbl->pdata = pdata;
 	pwmbl->gpio_on = pdata->gpio_on;
 
 	retval = pwm_channel_alloc(pdata->pwm_channel, &pwmbl->pwmc);
 	if (retval)
-		goto err_free_mem;
+		return retval;
 
 	if (pwmbl->gpio_on != -1) {
 		retval = devm_gpio_request(&pdev->dev, pwmbl->gpio_on,
 					"gpio_atmel_pwm_bl");
-		if (retval) {
-			pwmbl->gpio_on = -1;
+		if (retval)
 			goto err_free_pwm;
-		}
 
 		/* Turn display off by default. */
 		retval = gpio_direction_output(pwmbl->gpio_on,
@@ -197,7 +190,7 @@  static int atmel_pwm_bl_probe(struct platform_device *pdev)
 
 err_free_pwm:
 	pwm_channel_free(&pwmbl->pwmc);
-err_free_mem:
+
 	return retval;
 }