• Bruce Allan's avatar
    e1000e: issues in Sx on 82577/8/9 · 92fe1733
    Bruce Allan authored
    A workaround was previously put in the driver to reset the device when
    transitioning to Sx in order to activate the changed settings of the PHY
    OEM bits (Low Power Link Up, or LPLU, and GbE disable configuration) for
    82577/8/9 devices.  After further review, it was found such a reset can
    cause the 82579 to confuse which version of 82579 it actually is and broke
    LPLU on all 82577/8/9 devices.  The workaround during an S0->Sx transition
    on 82579 (instead of resetting the PHY) is to restart auto-negotiation
    after the OEM bits are configured; the restart of auto-negotiation
    activates the new OEM bits as does the reset.  With 82577/8, the reset is
    changed to a generic reset which fixes the LPLU bits getting set wrong.
    Signed-off-by: default avatarBruce Allan <bruce.w.allan@intel.com>
    Tested-by: default avatarAaron Brown <aaron.f.brown@intel.com>
    Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>