diff options
| author | Bruce Allan <bruce.w.allan@intel.com> | 2011-05-13 07:19:42 +0000 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-06-09 20:31:24 -0700 |
| commit | d9b24135b972ccdd5f5174fba06c730e895e6daf (patch) | |
| tree | ae5176a5b75cb8790d6411b5eb269edaaf31aec2 /drivers/net/e1000e/netdev.c | |
| parent | e357964ee66723d0ced63ac1dbd1db4a6a1d417e (diff) | |
e1000e: disable far-end loopback mode on ESB2
The ESB2 LAN includes a debug feature that enables far-end loopback (FELB)
of the SerDes/Kumeran interface. This feature is activated when receiving
a sequence of symbols that includes a reserved codeword. On a perfect
link, FELB would never be activated. In the presence of bit errors, there
is a very small, but non-zero, probability of FELB being activated.
If the FELB is activated, the SerDes link becomes non-functional and must
be reset. It could also corrupt the switching tables in the switch since
the ESB2 is transmitting packets with a different source MAC address.
This patch disables the FELB feature.
Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/e1000e/netdev.c')
0 files changed, 0 insertions, 0 deletions