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    Subject[PATCH AUTOSEL for 4.9 036/293] net: ena: disable admin msix while working in polling mode
    Date
    From: Netanel Belgazal <netanel@amazon.com>

    [ Upstream commit a2cc5198dac102775b21787752a2e0afe44ad311 ]

    Fixes: 1738cd3ed342 ("Add a driver for Amazon Elastic Network Adapters (ENA)")
    Signed-off-by: Netanel Belgazal <netanel@amazon.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    ---
    drivers/net/ethernet/amazon/ena/ena_com.c | 8 ++++++++
    1 file changed, 8 insertions(+)

    diff --git a/drivers/net/ethernet/amazon/ena/ena_com.c b/drivers/net/ethernet/amazon/ena/ena_com.c
    index f4c107b66af4..e13c9cd45dc0 100644
    --- a/drivers/net/ethernet/amazon/ena/ena_com.c
    +++ b/drivers/net/ethernet/amazon/ena/ena_com.c
    @@ -61,6 +61,8 @@

    #define ENA_MMIO_READ_TIMEOUT 0xFFFFFFFF

    +#define ENA_REGS_ADMIN_INTR_MASK 1
    +
    /*****************************************************************************/
    /*****************************************************************************/
    /*****************************************************************************/
    @@ -1448,6 +1450,12 @@ void ena_com_admin_destroy(struct ena_com_dev *ena_dev)

    void ena_com_set_admin_polling_mode(struct ena_com_dev *ena_dev, bool polling)
    {
    + u32 mask_value = 0;
    +
    + if (polling)
    + mask_value = ENA_REGS_ADMIN_INTR_MASK;
    +
    + writel(mask_value, ena_dev->reg_bar + ENA_REGS_INTR_MASK_OFF);
    ena_dev->admin_queue.polling = polling;
    }

    --
    2.15.1
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