From: Andreas Mohr <andi@lisas.de>
Date: Sun, 31 Jan 2010 02:58:42 +0000 (+0000)
Subject: MCS7830 USB-Ether: resume _with_ working link, via .reset_resume support
X-Git-Tag: v2.6.34-rc1~233^2~458
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ace2a4d0fbf868c00625a8fd91c44ad9fabe7012;p=pandora-kernel.git

MCS7830 USB-Ether: resume _with_ working link, via .reset_resume support

ChangeLog:
Implement .reset_resume support to retain a live network connection
during suspend despite USB power loss.
- rework operation to reference cached data in mcs7830_data and
  netdev->dev_addr
- update netdev->dev_addr only in case new MAC was set successfully
. Tests done:
  . ethtool -d pre-/post-suspend: register values match
  . running ssh session suspend, resume: works
  . ifdown device, suspend, resume: works
  . ifup, suspend, unplug, resume: WORKS (eth1 is removed, re-ifup of eth1
    after card replug works)
  . verified identical MAC in ifconfig post-resume
    (ok, should be verified on network side to be fully certain...)

Keywords: suspend resume network connection dead interface down

Signed-off-by: Andreas Mohr <andi@lisas.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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