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    Subject[PATCH 3.13 127/259] igb: do a reset on SR-IOV re-init if device is down
    Date
    3.13.11.6 -stable review patch.  If anyone has any objections, please let me know.

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

    From: Stefan Assmann <sassmann@kpanic.de>

    commit 76252723e88681628a3dbb9c09c963e095476f73 upstream.

    To properly re-initialize SR-IOV it is necessary to reset the device
    even if it is already down. Not doing this may result in Tx unit hangs.

    Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
    Tested-by: Aaron Brown <aaron.f.brown@intel.com>
    Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Kamal Mostafa <kamal@canonical.com>
    ---
    drivers/net/ethernet/intel/igb/igb_main.c | 2 ++
    1 file changed, 2 insertions(+)

    diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
    index ddbf995..6e0c7a9 100644
    --- a/drivers/net/ethernet/intel/igb/igb_main.c
    +++ b/drivers/net/ethernet/intel/igb/igb_main.c
    @@ -7857,6 +7857,8 @@ int igb_reinit_queues(struct igb_adapter *adapter)

    if (netif_running(netdev))
    igb_close(netdev);
    + else
    + igb_reset(adapter);

    igb_clear_interrupt_scheme(adapter);

    --
    1.9.1


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