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    Subject[patch 068/176] [SCSI] mpt2sas: fix internal device reset for older firmware prior to MPI Rev K
    2.6.36-stable review patch.  If anyone has any objections, please let us know.

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

    From: Kashyap, Desai <kashyap.desai@lsi.com>

    commit efe82a16bc0f9f9e1fc8fa706eb0309fcd57770a upstream.

    The "internal device reset complete" event is not supported
    for older firmware prior to MPI Rev K We added
    a check in the driver so the "internal device reset" event is
    ignored for older firmware. When ignored, the tm_busy flag doesn't
    get set nor cleared. Without this fix, IO queues would be froozen
    indefinetly after the "internal device reset" event, as the "complete" event
    never sent to clear the flag.

    Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
    Signed-off-by: James Bottomley <James.Bottomley@suse.de>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    drivers/scsi/mpt2sas/mpt2sas_scsih.c | 6 ++++++
    1 file changed, 6 insertions(+)

    --- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
    +++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
    @@ -4937,6 +4937,12 @@ _scsih_sas_device_status_change_event(st
    event_data);
    #endif

    + /* In MPI Revision K (0xC), the internal device reset complete was
    + * implemented, so avoid setting tm_busy flag for older firmware.
    + */
    + if ((ioc->facts.HeaderVersion >> 8) < 0xC)
    + return;
    +
    if (event_data->ReasonCode !=
    MPI2_EVENT_SAS_DEV_STAT_RC_INTERNAL_DEVICE_RESET &&
    event_data->ReasonCode !=



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