From b853f31940c84cce6a3f5cb4f529b029906ee69c Mon Sep 17 00:00:00 2001
From: Jonas Jensen <jonas.jensen@gmail.com>
Date: Mon, 25 Aug 2014 16:22:11 +0200
Subject: [PATCH] net: moxa: clear DESC1 on ndo_start_xmit()

TX buffer length is not cleared on ndo_start_xmit().
Failing to do so can bug/hang the controller and
cause TX interrupts to stop altogether.

Remove the readl() and compute a new value for DESC1.

Addresses https://bugzilla.kernel.org/show_bug.cgi?id=69031

Signed-off-by: Jonas Jensen <jonas.jensen@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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