linux-kernel - Re: [PATCH 2/2] w1: slaves: w1

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Message-ID: <20150107020003.GJ2522@spacedout.fries.net>
Date:	Tue, 6 Jan 2015 20:00:03 -0600
From:	David Fries <David@...es.net>
To:	Mariusz Gorski <marius.gorski@...il.com>
Cc:	Evgeniy Polyakov <zbr@...emap.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] w1: slaves: w1_therm: Add temp attribute

On Tue, Jan 06, 2015 at 03:29:56PM +0100, Mariusz Gorski wrote:
> Add new attribute to simplify reading of current temperature.

> +static ssize_t temp_show(struct device *device,
> +	struct device_attribute *attr, char *buf)
> +{
> +	struct w1_slave *sl = dev_to_w1_slave(device);
> +	struct w1_master *dev = sl->master;
> +	u8 rom[9], verdict;
> +	int temp;
> +
> +	if (mutex_lock_interruptible(&dev->bus_mutex))
> +		return -EINTR;
> +
> +	memset(rom, 0, sizeof(rom));
> +
> +	verdict = read_rom(device, rom);
> +
> +	if (verdict < 0)
> +		return verdict;

I wanted to point out that this returns without unlocking bus_mutex.

-- 
David Fries <david@...es.net>    PGP pub CB1EE8F0
http://fries.net/~david/
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