Subject: [PATCH] backlight: pwm: handle EPROBE_DEFER while requesting the PWM

From: [email-masked] (Nicolas Ferre)
Date: Wed, 11 Mar 2015 13:48:34 +0100

Le 19/02/2015 10:30, Nicolas Ferre a ?crit :
> When trying to request the PWM device with devm_pwm_get(), the EPROBE_DEFER
> flag is not handled properly. It can lead to the PWM not being found.
> 
> Signed-off-by: Boris Brezillon <[email-masked]>
> Signed-off-by: Nicolas Ferre <[email-masked]>

Any comment on this patch?
Can we see it included during next cycle (4.1)?

(aka ping).

Bye,

> ---
>  drivers/video/backlight/pwm_bl.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c
> index 3a145a643e0d..6897f1c1bc73 100644
> --- a/drivers/video/backlight/pwm_bl.c
> +++ b/drivers/video/backlight/pwm_bl.c
> @@ -274,6 +274,10 @@ static int pwm_backlight_probe(struct platform_device *pdev)
>  
>  	pb->pwm = devm_pwm_get(&pdev->dev, NULL);
>  	if (IS_ERR(pb->pwm)) {
> +		ret = PTR_ERR(pb->pwm);
> +		if (ret == -EPROBE_DEFER)
> +			goto err_alloc;
> +
>  		dev_err(&pdev->dev, "unable to request PWM, trying legacy API\n");
>  		pb->legacy = true;
>  		pb->pwm = pwm_request(data->pwm_id, "pwm-backlight");
> 

-- 
Nicolas Ferre