From d746d707a8b1421a4ba46b497cb5d59e20161645 Mon Sep 17 00:00:00 2001
From: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Date: Tue, 14 Jul 2015 13:43:19 -0700
Subject: [PATCH] net core: Add protodown support.

This patch introduces the proto_down flag that can be used by user space
applications to notify switch drivers that errors have been detected on the
device.

The switch driver can react to protodown notification by doing a phys down
on the associated switch port.

Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Signed-off-by: Andy Gospodarek <gospo@cumulusnetworks.com>
Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: Wilson Kok <wkok@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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