tree 9ca7509cd0cbbdae158b752c234cb23add8370f0
parent 43b39dcdbdf823a1c0ac1f2aa2d76bd2f210adc8
author Michael S. Tsirkin <mst@redhat.com> 1240190771 +0000
committer David S. Miller <davem@davemloft.net> 1240317766 -0700

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>