linux-kernel - Re: [PATCH] staging: iio: fix coding style

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Message-ID: <534977A7.3090100@kernel.org>
Date:	Sat, 12 Apr 2014 18:28:07 +0100
From:	Jonathan Cameron <jic23@...nel.org>
To:	Joel Porquet <joel@...quet.org>, gregkh@...uxfoundation.org,
	jg1.han@...sung.com
CC:	linux-iio@...r.kernel.org, devel@...verdev.osuosl.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: iio: fix coding style

On 09/04/14 19:09, Joel Porquet wrote:
> As suggested by checkpatch.pl, use dev_info() instead of
> printk(KERN_INFO ...) to print message.
>
> Signed-off-by: Joel Porquet <joel@...quet.org>
> ---
> Only tested by compilation.
>   drivers/staging/iio/trigger/iio-trig-periodic-rtc.c | 3 ++-
>   1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c b/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c
> index 48a6afa..38ecb4b 100644
> --- a/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c
> +++ b/drivers/staging/iio/trigger/iio-trig-periodic-rtc.c
> @@ -33,7 +33,8 @@ static int iio_trig_periodic_rtc_set_state(struct iio_trigger *trig, bool state)
>   	struct iio_prtc_trigger_info *trig_info = iio_trigger_get_drvdata(trig);
>   	if (trig_info->frequency == 0)
>   		return -EINVAL;
> -	printk(KERN_INFO "trigger frequency is %d\n", trig_info->frequency);
> +	dev_info(&trig_info->rtc->dev, "trigger frequency is %d\n",
> +			trig_info->frequency);
The principle is good, but why make the error message us the underlying rtc device?
Going to lead to a rather unhelpful error message.

Perhaps the iio_trigger structures device element would make more sense?
Might not be terribly informative, but will at least come from the right
subsystem.

Also, I think we will be dropping this driver entirely at some point.
It was a dodgy hack that perhaps made sense at the time, but now a high
resolution timer is going to give better results.
>   	return rtc_irq_set_state(trig_info->rtc, &trig_info->task, state);
>   }
>
>

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