From 8200bc72a88cbb63ee13d7f9f16ec4f7249c2ec2 Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <bhelgaas@google.com>
Date: Wed, 22 Aug 2012 10:29:42 -0600
Subject: [PATCH] r8169: Preserve other Device Control bits when setting
 NOSNOOP_EN

Previously, when we turned on the "Enable No Snoop Bit," we cleared all
the other Device Control bits, including error reporting enables,
Max_Payload_Size, Max_Read_Request_Size, etc.  This patch preserves
all the other bits.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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