| From | Greg Kroah-Hartman <> | Subject | [ 181/218] libata: Prevent interface errors with Seagate FreeAgent GoFlex | Date | Fri, 28 Sep 2012 13:16:38 -0700 |
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3.4-stable review patch. If anyone has any objections, please let me know.
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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 @@ -4125,6 +4125,7 @@ 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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