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authorMichael S. Tsirkin <mst@redhat.com>2009-04-20 01:26:11 +0000
committerDavid S. Miller <davem@davemloft.net>2009-04-21 05:42:46 -0700
commit6f26c9a7555e5bcca3560919db9b852015077dae (patch)
tree9ca7509cd0cbbdae158b752c234cb23add8370f0 /net/core/iovec.c
parent43b39dcdbdf823a1c0ac1f2aa2d76bd2f210adc8 (diff)
downloadlinux-6f26c9a7555e5bcca3560919db9b852015077dae.tar.bz2
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.c7
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) {