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    Subject[PATCH 4.4 057/114] ixgbe: fix RSS limit for X550
    Date
    4.4-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    [ Upstream commit e9ee3238f8a480bbca58e51d02a93628d7c1f265 ]

    X550 allows for up to 64 RSS queues, but the driver can have max
    of 63 (-1 MSIX vector for link).

    On systems with >= 64 CPUs the driver will set the redirection table
    for all 64 queues which will result in packets being dropped.

    Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
    Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
    Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/net/ethernet/intel/ixgbe/ixgbe.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
    index 1d2174526a4c..18e4e4a69262 100644
    --- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
    +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
    @@ -312,7 +312,7 @@ enum ixgbe_ring_f_enum {
    };

    #define IXGBE_MAX_RSS_INDICES 16
    -#define IXGBE_MAX_RSS_INDICES_X550 64
    +#define IXGBE_MAX_RSS_INDICES_X550 63
    #define IXGBE_MAX_VMDQ_INDICES 64
    #define IXGBE_MAX_FDIR_INDICES 63 /* based on q_vector limit */
    #define IXGBE_MAX_FCOE_INDICES 8
    --
    2.17.1


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