linux-kernel - Re: [PATCH 01/11] watchdog: WatchDog Timer Driver Core

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Date:	Tue, 12 Jul 2011 01:02:05 +0200
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Wolfram Sang <w.sang@...gutronix.de>
CC:	Wim Van Sebroeck <wim@...ana.be>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux Watchdog Mailing List <linux-watchdog@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH 01/11] watchdog: WatchDog Timer Driver Core - Add basic
 framework

On 07/11/2011 11:32 PM, Wolfram Sang wrote:

>> +int watchdog_register_device(struct watchdog_device *wdd)
>> +{
>> +	int ret;
>> +
>> +	/* Make sure we have a valid watchdog_device structure */
>> +	if (wdd == NULL || wdd->info == NULL || wdd->ops == NULL)
>> +		return -EINVAL;
>> +
>> +	/* Make sure that the mandatory operations are supported */
>> +	if (wdd->ops->start == NULL || wdd->ops->stop == NULL)
>> +		return -EINVAL;
> 
> Check also for wdd->ops->owner? Should we mark it as mandatory?
> 

If the driver is built-in owner will be NULL.

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