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From: Hans de Goede <hdegoede@redhat.com>
To: Wim Van Sebroeck <wim@iguana.be>
Cc: "Alan Cox" <alan@lxorguk.ukuu.org.uk>,
	linux-watchdog@vger.kernel.org,
	"LM Sensors" <lm-sensors@lm-sensors.org>,
	"Thilo Cestonaro" <thilo.cestonaro@ts.fujitsu.com>,
	"Pádraig Brady" <P@draigBrady.com>
Subject: Re: [PATCH 1/3] watchdog_dev: Add support for having more then 1 watchdog
Date: Mon, 07 May 2012 08:58:00 +0200	[thread overview]
Message-ID: <4FA77278.5030705@redhat.com> (raw)
In-Reply-To: <20120504123434.GR3074@spo001.leaseweb.com>

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

WARNING: multiple messages have this Message-ID (diff)
From: Hans de Goede <hdegoede@redhat.com>
To: Wim Van Sebroeck <wim@iguana.be>
Cc: "Alan Cox" <alan@lxorguk.ukuu.org.uk>,
	linux-watchdog@vger.kernel.org,
	"LM Sensors" <lm-sensors@lm-sensors.org>,
	"Thilo Cestonaro" <thilo.cestonaro@ts.fujitsu.com>,
	"Pádraig Brady" <P@draigBrady.com>
Subject: Re: [lm-sensors] [PATCH 1/3] watchdog_dev: Add support for having more then 1 watchdog
Date: Mon, 07 May 2012 06:58:00 +0000	[thread overview]
Message-ID: <4FA77278.5030705@redhat.com> (raw)
In-Reply-To: <20120504123434.GR3074@spo001.leaseweb.com>

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

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  reply	other threads:[~2012-05-07  6:58 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-03-15 11:59 Watchdog timer core enhancements Hans de Goede
2012-03-15 11:59 ` [lm-sensors] " Hans de Goede
2012-03-15 11:59 ` [PATCH 1/3] watchdog_dev: Add support for having more then 1 watchdog Hans de Goede
2012-03-15 11:59   ` [lm-sensors] " Hans de Goede
2012-03-15 13:11   ` Alan Cox
2012-03-15 13:11     ` [lm-sensors] " Alan Cox
2012-03-15 14:18     ` Hans de Goede
2012-03-15 14:18       ` [lm-sensors] " Hans de Goede
2012-03-15 15:38       ` Alan Cox
2012-03-15 15:38         ` [lm-sensors] " Alan Cox
2012-05-04 12:34         ` Wim Van Sebroeck
2012-05-04 12:34           ` [lm-sensors] " Wim Van Sebroeck
2012-05-07  6:58           ` Hans de Goede [this message]
2012-05-07  6:58             ` Hans de Goede
2012-03-15 11:59 ` [PATCH 2/3] watchdog_dev: Add support for dynamically allocated watchdog_device structs Hans de Goede
2012-03-15 11:59   ` [lm-sensors] " Hans de Goede
2012-03-15 11:59 ` [PATCH 3/3] watchdog_dev: Let the driver update the timeout field on set_timeout success Hans de Goede
2012-03-15 11:59   ` [lm-sensors] [PATCH 3/3] watchdog_dev: Let the driver update the timeout field on set_timeout succes Hans de Goede
2012-03-15 12:39 ` Watchdog timer core enhancements Pádraig Brady
2012-03-15 12:39   ` [lm-sensors] " Pádraig Brady
2012-03-15 21:13 ` Wim Van Sebroeck
2012-03-15 21:13   ` [lm-sensors] " Wim Van Sebroeck
2012-03-16  7:43   ` Hans de Goede
2012-03-16  7:43     ` [lm-sensors] " Hans de Goede
2012-03-17 12:56   ` Wolfram Sang
2012-03-17 12:56     ` [lm-sensors] " Wolfram Sang

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