libata acpi issue on gateway laptop

[Kyle McMartin]

Hi Jeff,

A user is reporting an issue with 2.6.34.6 on a Gateway laptop that
booting with libata.noacpi=1 resolves.

Symptom is that their device dumps a lot of messages like this:

ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
ata1.00: ACPI cmd 00/00:00:00:00:00:a0 (NOP) rejected by device
(Stat=0x51 Err=0x04)
ata1.00: ACPI cmd ef/10:01:00:00:00:a0 (SET FEATURES) succeeded
ata1.00: ACPI cmd ef/10:02:00:00:00:a0 (SET FEATURES) succeeded
ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
ata1.00: ACPI cmd ef/10:04:00:00:00:a0 (SET FEATURES) succeeded
ata1.00: ACPI cmd ef/10:05:00:00:00:a0 (SET FEATURES) rejected by device
(Stat=0x51 Err=0x04)
ata1.00: ATA-8: Hitachi HTS545050B9A300, PB4OC60F, max UDMA/133
ata1.00: 976773168 sectors, multi 0: LBA48 NCQ (depth 31/32), AA
ata1.00: ACPI cmd 00/00:00:00:00:00:a0 (NOP) rejected by device
(Stat=0x51 Err=0x04)
ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out
ata1.00: ACPI cmd ef/10:05:00:00:00:a0 (SET FEATURES) rejected by device
(Stat=0x51 Err=0x04)
ata1.00: configured for UDMA/133

on boot and resume from suspend.

Dmesg is at https://bugzilla.redhat.com/attachment.cgi?id=442529 and the
full bug report at https://bugzilla.redhat.com/show_bug.cgi?id=629315.

Any ideas? They say the issue exists all the way back to 2.6.31, so it
seems like a pretty long-lived bug.

Thanks!
 Kyle
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