From c953e23936f902c7719166327e3113639105c981 Mon Sep 17 00:00:00 2001
From: Ken-ichirou MATSUZAWA <chamaken@gmail.com>
Date: Thu, 20 Aug 2015 12:43:53 +0900
Subject: [PATCH] netlink: mmap: fix tx type check

I can't send netlink message via mmaped netlink socket since

    commit: a8866ff6a5bce7d0ec465a63bc482a85c09b0d39
    netlink: make the check for "send from tx_ring" deterministic

msg->msg_iter.type is set to WRITE (1) at

    SYSCALL_DEFINE6(sendto, ...
        import_single_range(WRITE, ...
            iov_iter_init(1, WRITE, ...

call path, so that we need to check the type by iter_is_iovec()
to accept the WRITE.

Signed-off-by: Ken-ichirou MATSUZAWA <chamas@h4.dion.ne.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
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