• Bruce Allan's avatar
    e1000e: fix checks for manageability enabled and management pass-through · a65a4a0d
    Bruce Allan authored
    The mac->arc_subsystem was being incorrectly used to flag whether or not
    manageability was enabled when it should only be used to state whether the
    ARC (Host interface) subsystem is available on a particular MAC _and_ only
    valid when any manageability is enabled. The ARC subsystem is currently
    only available on 80003es2lan and 82573 parts supported by the driver.
    
    A new flag, has_fwsm, is introduced to be used when checking if
    manageability is enabled but only on parts that acutally have an FWSM
    register. While the above parts have an FWSM register, there are other
    parts that have FWSM but do not have support for the ARC subsystem,
    namely 82571/2 and ICHx/PCH.
    
    And then there are parts that have manageability, but do not have either
    FWSM register or support for the ARC subsystem - these are 82574 and 82583.
    
    For 80003es2lan, 82571/2/3 and ICH/PCH parts, this patch makes no
    functional changes, it only corrects the usage of the manageability flags.
    For 82574 and 82583, it fixes the incorrect accesses of the non-existent
    FWSM register and ARC subsystem as well as corrects the check for
    management pass-through.
    Signed-off-by: default avatarBruce Allan <bruce.w.allan@intel.com>
    Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
    Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
    a65a4a0d
ich8lan.c 95 KB