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Date: Mon, 07 May 2012 08:58:00 +0200
From: Hans de Goede <hdegoede@redhat.com>
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To: Wim Van Sebroeck <wim@iguana.be>
CC: Alan Cox <alan@lxorguk.ukuu.org.uk>,
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Subject: Re: [PATCH 1/3] watchdog_dev: Add support for having more then 1
 watchdog
References: <1331812757-3491-1-git-send-email-hdegoede@redhat.com> <1331812757-3491-2-git-send-email-hdegoede@redhat.com> <20120315131131.1096f8c8@pyramind.ukuu.org.uk> <4F61FA18.70104@redhat.com> <20120315153833.40bd2f16@pyramind.ukuu.org.uk> <20120504123434.GR3074@spo001.leaseweb.com>
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Hi,

On 05/04/2012 02:34 PM, Wim Van Sebroeck wrote:
> Hi Alan,
>
>>> You do this even for watchdog0 / for the watchdog we've also registered as
>>> misc_dev. I guess this is intentional and you want the watchdog to be
>>> available as both misc,130 as well as as MAJOR(dog_devt),0 ?
>>
>> Yes - so that it appears in the watchdog class in sysfs for example.
>
> What happens if one program opens the miscdevice and another program opens the MAJOR(dog_devt),0 device?
> I presume that the WDOG_DEV_OPEN status bit will prohibit the opening of the second device in that case...

Correct.

Regards,

Hans