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Date: Thu, 30 Apr 2009 08:05:12 -0700 (PDT)
From: Trent Piepho <xyzzy@speakeasy.org>
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cc: Mauro Carvalho Chehab <mchehab@infradead.org>, linux-media@vger.kernel.org,
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Subject: Re: [PATCH] v4l2: fill the reserved fields of VIDIOC_REQBUFS ioctl
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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.