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| author | Michael S. Tsirkin <mst@redhat.com> | 2009-04-20 01:26:11 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-04-21 05:42:46 -0700 |
| commit | 6f26c9a7555e5bcca3560919db9b852015077dae (patch) | |
| tree | 9ca7509cd0cbbdae158b752c234cb23add8370f0 /net/core/iovec.c | |
| parent | 43b39dcdbdf823a1c0ac1f2aa2d76bd2f210adc8 (diff) | |
| download | linux-6f26c9a7555e5bcca3560919db9b852015077dae.tar.gz linux-6f26c9a7555e5bcca3560919db9b852015077dae.tar.bz2 linux-6f26c9a7555e5bcca3560919db9b852015077dae.zip | |
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>
Diffstat (limited to 'net/core/iovec.c')
| -rw-r--r-- | net/core/iovec.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/net/core/iovec.c b/net/core/iovec.c index a215545c0a34..40a76ce19d9f 100644 --- a/net/core/iovec.c +++ b/net/core/iovec.c @@ -147,10 +147,11 @@ int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len) } /* - * For use with ip_build_xmit + * Copy iovec from kernel. Returns -EFAULT on error. */ -int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov, int offset, - int len) + +int memcpy_fromiovecend(unsigned char *kdata, const struct iovec *iov, + int offset, int len) { /* Skip over the finished iovecs */ while (offset >= iov->iov_len) { |