linux-kernel - Re: [PATCH] v4l2: fill the reserved fields of VIDIOC

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Message-ID: <Pine.LNX.4.58.0904300803410.7837@shell2.speakeasy.net>
Date:	Thu, 30 Apr 2009 08:05:12 -0700 (PDT)
From:	Trent Piepho <xyzzy@...akeasy.org>
To:	Németh Márton <nm127@...email.hu>
cc:	Mauro Carvalho Chehab <mchehab@...radead.org>,
	linux-media@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] v4l2: fill the reserved fields of VIDIOC_REQBUFS ioctl

On Wed, 29 Apr 2009, [UTF-8] Németh Márton wrote:
> The parameter of VIDIOC_REQBUFS is a pointer to struct v4l2_requestbuffers.
> This structure has reserved fields which has to be filled with zeros
> according to the V4L2 API specification, revision 0.24 [1].

As I read the spec, the reserved fields can be used for input from user
space if the buffer is of type V4L2_BUF_TYPE_PRIVATE or higher.
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