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    Subject[PATCH 4.15 35/64] net: thunderbolt: Tear down connection properly on suspend
    Date
    4.15-stable review patch.  If anyone has any objections, please let me know.

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

    From: Mika Westerberg <mika.westerberg@linux.intel.com>

    commit 8e021a14d908475fea89ef85b5421865f7ad650d upstream.

    When suspending to mem or disk the Thunderbolt controller typically goes
    down as well tearing down the connection automatically. However, when
    suspend to idle is used this does not happen so we need to make sure the
    connection is properly disconnected before it can be re-established
    during resume.

    Fixes: e69b6c02b4c3 ("net: Add support for networking over Thunderbolt cable")
    Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
    Cc: stable@vger.kernel.org
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/net/thunderbolt.c | 5 +----
    1 file changed, 1 insertion(+), 4 deletions(-)

    --- a/drivers/net/thunderbolt.c
    +++ b/drivers/net/thunderbolt.c
    @@ -1270,10 +1270,7 @@ static int __maybe_unused tbnet_suspend(
    stop_login(net);
    if (netif_running(net->dev)) {
    netif_device_detach(net->dev);
    - tb_ring_stop(net->rx_ring.ring);
    - tb_ring_stop(net->tx_ring.ring);
    - tbnet_free_buffers(&net->rx_ring);
    - tbnet_free_buffers(&net->tx_ring);
    + tbnet_tear_down(net, true);
    }

    return 0;

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