From: Mauro Carvalho Chehab <mchehab@infradead.org>
Date: Sun, 13 Apr 2008 17:58:21 +0000 (-0300)
Subject: V4L/DVB (7552): videbuf-vmalloc: Corrects mmap code
X-Git-Tag: v2.6.26-rc1~1084^2~162
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=968ced78a53509a996708a14e8b9269d1dc6a61c;p=pandora-kernel.git

V4L/DVB (7552): videbuf-vmalloc: Corrects mmap code

There were some bugs on videobuf-vmalloc.

Basically, remap were called with a wrong parameter. Due to that, a later remap
were needed, generating the need of some hacks on videobuf-vmalloc and
videobuf-core.

This patch fixes the remap and removes the hacks.

TODO:

- V4L2_MEMORY_USERPTR is not implemented yet. This method should be
  properly implemented, in order to work with a few userspace applications.

- The driver also doesn't implement V4L2_MEMORY_OVERLAY. This method is used
  only by a few applications, and are becaming obsolete, due to the increment
  of cpu performance. So, most apps prefer to retrieve data to an internal
  buffer, doing some processing like de-interlacing.

Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
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