commit d0efa8f23a644f7cb7d1f8e78dd9a223efa412a3
author Tushar Dave <tushar.n.dave@intel.com> Thu Jul 12 08:56:56 2012 +0000
committer Jeff Kirsher <jeffrey.t.kirsher@intel.com> Sat Jul 14 00:43:27 2012 -0700
tree 6211ea45128d665f9489cada230fec0ef62da221
parent 7ac2908e4b2edaec60e9090ddb4d9ceb76c05e7d

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>