linux-kernel - Re: [PATCH v2 2/6] leds: netdev trigger: factor out middle part of device_name

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Message-ID: <20190318112431.GB6101@amd>
Date:   Mon, 18 Mar 2019 12:24:31 +0100
From:   Pavel Machek <pavel@....cz>
To:     Rasmus Villemoes <linux@...musvillemoes.dk>
Cc:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        LKML <linux-kernel@...r.kernel.org>, linux-leds@...r.kernel.org
Subject: Re: [PATCH v2 2/6] leds: netdev trigger: factor out middle part of
 device_name_store

Hi!

> Take the part of device_name_store that puts the old device (if any),
> copies the new device name, looks the name up etc. into a separate
> helper function. This is preparation for using that helper from a
> function that will initialize the led_netdev_data from a device tree
> node. No functional change.
> 
> Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
> ---
>  drivers/leds/trigger/ledtrig-netdev.c | 30 ++++++++++++++++-----------
>  1 file changed, 18 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/leds/trigger/ledtrig-netdev.c b/drivers/leds/trigger/ledtrig-netdev.c
> index 8d476b92f58c..21605033e322 100644
> --- a/drivers/leds/trigger/ledtrig-netdev.c
> +++ b/drivers/leds/trigger/ledtrig-netdev.c
> @@ -104,19 +104,9 @@ static ssize_t device_name_show(struct device *dev,
>  	return len;
>  }
>  
> -static ssize_t device_name_store(struct device *dev,
> -				 struct device_attribute *attr, const char *buf,
> -				 size_t size)
> +static void netdev_trig_set_device(struct led_netdev_data *trigger_data,
> +				   const char *buf, size_t size)
>  {
> -	struct led_netdev_data *trigger_data = led_trigger_get_drvdata(dev);
> -
> -	if (size >= IFNAMSIZ)
> -		return -EINVAL;
> -
> -	cancel_delayed_work_sync(&trigger_data->work);
> -
> -	spin_lock_bh(&trigger_data->lock);
> -
>  	if (trigger_data->net_dev) {
>  		dev_put(trigger_data->net_dev);
>  		trigger_data->net_dev = NULL;

I'd expect the helper function to do the >= IFNAMSIZ checking... but
not a huge deal.

									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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