linux-kernel - Re: [PATCH 1/3] rtc: initialize rtc name early

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Date:	Wed, 1 Apr 2015 05:01:05 +0200
From:	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
To:	Aaro Koskinen <aaro.koskinen@....fi>
Cc:	Alessandro Zummo <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] rtc: initialize rtc name early

On 28/03/2015 at 23:09:34 +0200, Aaro Koskinen wrote :
> In some error cases RTC name is used before it is initialized:
> 
> 	rtc-rs5c372 0-0032: clock needs to be set
> 	rtc-rs5c372 0-0032: rs5c372b found, 24hr, driver version 0.6
> 	rtc (null): read_time: fail to read
> 	rtc-rs5c372 0-0032: rtc core: registered rtc-rs5c372 as rtc0
> 
> Fix by initializing the name early.
> 
> Signed-off-by: Aaro Koskinen <aaro.koskinen@....fi>
Acked-by: Alexandre Belloni <alexandre.belloni@...e-electrons.com>

> ---
>  drivers/rtc/class.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
> index 472a5ad..014ecbc 100644
> --- a/drivers/rtc/class.c
> +++ b/drivers/rtc/class.c
> @@ -225,15 +225,15 @@ struct rtc_device *rtc_device_register(const char *name, struct device *dev,
>  	rtc->pie_timer.function = rtc_pie_update_irq;
>  	rtc->pie_enabled = 0;
>  
> +	strlcpy(rtc->name, name, RTC_DEVICE_NAME_SIZE);
> +	dev_set_name(&rtc->dev, "rtc%d", id);
> +
>  	/* Check to see if there is an ALARM already set in hw */
>  	err = __rtc_read_alarm(rtc, &alrm);
>  
>  	if (!err && !rtc_valid_tm(&alrm.time))
>  		rtc_initialize_alarm(rtc, &alrm);
>  
> -	strlcpy(rtc->name, name, RTC_DEVICE_NAME_SIZE);
> -	dev_set_name(&rtc->dev, "rtc%d", id);
> -
>  	rtc_dev_prepare(rtc);
>  
>  	err = device_register(&rtc->dev);
> -- 
> 2.2.0
> 

-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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