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    Subject[PATCH 3.12 086/176] Revert "[SCSI] mpt3sas: Remove phys on topology change"
    Date
    From: Sreekanth Reddy <sreekanth.reddy@avagotech.com>

    3.12-stable review patch. If anyone has any objections, please let me know.

    ===============

    commit 2311ce4d9c91ed63a46e18f0378f3e406e7e888e upstream.

    This reverts commit 963ba22b90a955363644cd397b20226928eab976
    ("mpt3sas: Remove phys on topology change")

    Reverting the previous mpt3sas drives patch changes,
    since we will observe below issue

    Issue:
    Drives connected Enclosure/Expander will unregister with
    SCSI Transport Layer, if any one remove and add expander
    cable with in DMD (Device Missing Delay) time period or
    even any one power-off and power-on the Enclosure with in
    the DMD period.

    Signed-off-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
    Reviewed-by: Tomas Henzl <thenzl@redhat.com>
    Signed-off-by: Christoph Hellwig <hch@lst.de>
    Signed-off-by: Jiri Slaby <jslaby@suse.cz>
    ---
    drivers/scsi/mpt3sas/mpt3sas_transport.c | 5 +----
    1 file changed, 1 insertion(+), 4 deletions(-)

    diff --git a/drivers/scsi/mpt3sas/mpt3sas_transport.c b/drivers/scsi/mpt3sas/mpt3sas_transport.c
    index e771a88c6a74..dcadd56860ff 100644
    --- a/drivers/scsi/mpt3sas/mpt3sas_transport.c
    +++ b/drivers/scsi/mpt3sas/mpt3sas_transport.c
    @@ -1003,12 +1003,9 @@ mpt3sas_transport_update_links(struct MPT3SAS_ADAPTER *ioc,
    &mpt3sas_phy->remote_identify);
    _transport_add_phy_to_an_existing_port(ioc, sas_node,
    mpt3sas_phy, mpt3sas_phy->remote_identify.sas_address);
    - } else {
    + } else
    memset(&mpt3sas_phy->remote_identify, 0 , sizeof(struct
    sas_identify));
    - _transport_del_phy_from_an_existing_port(ioc, sas_node,
    - mpt3sas_phy);
    - }

    if (mpt3sas_phy->phy)
    mpt3sas_phy->phy->negotiated_linkrate =
    --
    2.2.2


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