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[NET]: Do not dereference iov if length is zero
authorHerbert Xu <herbert@gondor.apana.org.au>
Thu, 6 Sep 2007 13:06:35 +0000 (14:06 +0100)
committerDavid S. Miller <davem@kimchee.(none)>
Tue, 11 Sep 2007 08:29:07 +0000 (10:29 +0200)
commitef8aef55ce61fd0e2af798695f7386ac756ae1e7
treedd3d30a25e69fa94dcffa024e5a87758c0f6ba24tree | snapshot
parent2fbe43f6f631dd7ce19fb1499d6164a5bdb34568commit | diff
[NET]: Do not dereference iov if length is zero

When msg_iovlen is zero we shouldn't try to dereference
msg_iov.  Right now the only thing that tries to do so
is skb_copy_and_csum_datagram_iovec.  Since the total
length should also be zero if msg_iovlen is zero, it's
sufficient to check the total length there and simply
return if it's zero.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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