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    Subject[PATCH 4.9 10/71] net: macb: disable scatter-gather for macb on sama5d3
    Date
    4.9-stable review patch.  If anyone has any objections, please let me know.

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

    From: Nicolas Ferre <nicolas.ferre@microchip.com>

    [ Upstream commit eb4ed8e2d7fecb5f40db38e4498b9ee23cddf196 ]

    Create a new configuration for the sama5d3-macb new compatibility string.
    This configuration disables scatter-gather because we experienced lock down
    of the macb interface of this particular SoC under very high load.

    Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/net/ethernet/cadence/macb.c | 8 ++++++++
    1 file changed, 8 insertions(+)

    --- a/drivers/net/ethernet/cadence/macb.c
    +++ b/drivers/net/ethernet/cadence/macb.c
    @@ -2861,6 +2861,13 @@ static const struct macb_config at91sam9
    .init = macb_init,
    };

    +static const struct macb_config sama5d3macb_config = {
    + .caps = MACB_CAPS_SG_DISABLED
    + | MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
    + .clk_init = macb_clk_init,
    + .init = macb_init,
    +};
    +
    static const struct macb_config pc302gem_config = {
    .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
    .dma_burst_length = 16,
    @@ -2925,6 +2932,7 @@ static const struct of_device_id macb_dt
    { .compatible = "cdns,gem", .data = &pc302gem_config },
    { .compatible = "atmel,sama5d2-gem", .data = &sama5d2_config },
    { .compatible = "atmel,sama5d3-gem", .data = &sama5d3_config },
    + { .compatible = "atmel,sama5d3-macb", .data = &sama5d3macb_config },
    { .compatible = "atmel,sama5d4-gem", .data = &sama5d4_config },
    { .compatible = "cdns,at91rm9200-emac", .data = &emac_config },
    { .compatible = "cdns,emac", .data = &emac_config },

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