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From: "Németh Márton" <nm127@freemail.hu>
To: Hans de Goede <hdegoede@redhat.com>
Cc: Jean-Francois Moine <moinejf@free.fr>,
	V4L Mailing List <linux-media@vger.kernel.org>
Subject: Re: pac7302: INFO: possible circular locking dependency detected
Date: Sun, 08 Nov 2009 10:56:28 +0100	[thread overview]
Message-ID: <4AF695CC.7040809@freemail.hu> (raw)
In-Reply-To: <4AF68BC6.4040801@redhat.com>

Hi,

Hans de Goede wrote:
> [snip]
> 
> About the usb control msg errors, I don't think they are related to this issue at all, no real
> world app ever does a streamon and an mmap at the same time. As said if we could serialize mmap and
> ioctl at a high enough level, things would be fine too.

I am using http://moinejf.free.fr/svv.c . In the start_capturing() function it calls the
VIDIOC_STREAMON ioctl in case of memory mapped mode. Is this wrong? Or do you mean under
"at the same time" that VIDIOC_STREAMON and mmap() is called from different tasks/threads?

Regards,

	Márton Németh

  reply	other threads:[~2009-11-08  9:56 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-11-06 21:05 pac7302: INFO: possible circular locking dependency detected Németh Márton
2009-11-08  9:13 ` Hans de Goede
2009-11-08  9:56   ` Németh Márton [this message]
2009-11-08 16:18     ` Hans de Goede

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