From: Michael S. Tsirkin <mst@redhat.com>
Date: Mon, 20 Apr 2009 01:26:11 +0000 (+0000)
Subject: tun: fix tun_chr_aio_write so that aio works
X-Git-Tag: v2.6.31-rc1~330^2~583
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6f26c9a7555e5bcca3560919db9b852015077dae;p=pandora-kernel.git

tun: fix tun_chr_aio_write so that aio works

aio_write gets const struct iovec * but tun_chr_aio_write casts this to struct
iovec * and modifies the iovec. As a result, attempts to use io_submit
to send packets to a tun device fail with weird errors such as EINVAL.

Since tun is the only user of skb_copy_datagram_from_iovec, we can
fix this simply by changing the later so that it does not
touch the iovec passed to it.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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