From: Tushar Dave <tushar.n.dave@intel.com>
Date: Thu, 12 Jul 2012 08:56:56 +0000 (+0000)
Subject: e1000e: Correct link check logic for 82571 serdes
X-Git-Tag: v3.5~24^2~4^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d0efa8f23a644f7cb7d1f8e78dd9a223efa412a3;p=pandora-kernel.git

e1000e: Correct link check logic for 82571 serdes

SYNCH bit and IV bit of RXCW register are sticky. Before examining these bits,
RXCW should be read twice to filter out one-time false events and have correct
values for these bits. Incorrect values of these bits in link check logic can
cause weird link stability issues if auto-negotiation fails.

CC: stable <stable@vger.kernel.org> [2.6.38+]
Reported-by: Dean Nelson <dnelson@redhat.com>
Signed-off-by: Tushar Dave <tushar.n.dave@intel.com>
Reviewed-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Jeff Pieper <jeffrey.e.pieper@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

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