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    Subject[ 227/262] libata: Prevent interface errors with Seagate FreeAgent GoFlex
    Date
    From: Greg KH <gregkh@linuxfoundation.org>

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

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

    From: Daniel J Blueman <daniel@quora.org>

    commit c531077f40abc9f2129c4c83a30b3f8d6ce1c0e7 upstream.

    When using my Seagate FreeAgent GoFlex eSATAp external disk enclosure,
    interface errors are always seen until 1.5Gbps is negotiated [1]. This
    occurs using any disk in the enclosure, and when the disk is connected
    directly with a generic passive eSATAp cable, we see stable 3Gbps
    operation as expected.

    Blacklist 3Gbps mode to avoid dataloss and the ~30s delay bus reset
    and renegotiation incurs.

    Signed-off-by: Daniel J Blueman <daniel@quora.org>
    Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/ata/libata-core.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/drivers/ata/libata-core.c
    +++ b/drivers/ata/libata-core.c
    @@ -4126,6 +4126,7 @@ static const struct ata_blacklist_entry

    /* Devices which aren't very happy with higher link speeds */
    { "WD My Book", NULL, ATA_HORKAGE_1_5_GBPS, },
    + { "Seagate FreeAgent GoFlex", NULL, ATA_HORKAGE_1_5_GBPS, },

    /*
    * Devices which choke on SETXFER. Applies only if both the



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