• David Ertman's avatar
    e1000e: Failure to write SHRA turns on PROMISC mode · b3e5bf1f
    David Ertman authored
    Previously, the check to turn on promiscuous mode only took into account
    the total number of SHared Receive Address (SHRA) registers and if the
    request was for a register within that range.  It is possible that the
    Management Engine might have locked a number of SHRA and not allowed a
    new address to be written to the requested register.
    Add a function to determine the number of unlocked SHRA registers.  Then
    determine if the number of registers available is sufficient for our needs,
    if not then return -ENOMEM so that UNICAST PROMISC mode is activated.
    Since the method by which ME claims SHRA registers is non-deterministic,
    also add a return value to the function attempting to write an address
    to a SHRA, and return a -E1000_ERR_CONFIG if the write fails.  The error
    will be passed up the function chain and allow the driver to also set
    UNICAST PROMISC when this happens.
    Cc: Vlad Yasevich <vyasevic@redhat.com>
    Signed-off-by: default avatarDave Ertman <davidx.m.ertman@intel.com>
    Tested-by: default avatarAaron Brown <aaron.f.brown@intel.com>
    Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
ich8lan.c 141 KB