Comment 38 for bug 231575

I can also confirm that this still exists in the jaunty kernel with pata_via. Using jaunty, libata doesn't throttle the bus speed down repeatedly anymore, but still disables the device. Has anyone found any activity in the kernel lists about this? I did some searching, but found mostly old entries that didn't look like they were going to lead to a fix.

New error output:
[147852.989031] ata3.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[147852.989039] ata3.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
[147852.989040] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[147852.989041] res 40/00:03:00:00:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
[147852.989044] ata3.00: status: { DRDY }
[147852.989064] ata3: soft resetting link
[147853.201241] ata3.00: configured for UDMA/66
[147858.201027] ata3.00: qc timeout (cmd 0xa0)
[147858.201035] ata3.00: TEST_UNIT_READY failed (err_mask=0x5)
[147858.201055] ata3: soft resetting link
[147858.413241] ata3.00: configured for UDMA/66
[147863.413026] ata3.00: qc timeout (cmd 0xa0)
[147863.413032] ata3.00: TEST_UNIT_READY failed (err_mask=0x5)
[147863.413036] ata3.00: limiting speed to UDMA/66:PIO3
[147863.413055] ata3: soft resetting link
[147863.625256] ata3.00: configured for UDMA/66
[147868.625029] ata3.00: qc timeout (cmd 0xa0)
[147868.625036] ata3.00: TEST_UNIT_READY failed (err_mask=0x5)
[147868.625039] ata3.00: disabled
[147868.625071] ata3: soft resetting link
[147868.781077] ata3: EH complete

detection output when driver is loaded:
[ 2.268084] pata_via 0000:00:0f.1: version 0.3.3
[ 2.268208] scsi2 : pata_via
[ 2.268259] scsi3 : pata_via
[ 2.269302] ata3: PATA max UDMA/133 cmd 0x1f0 ctl 0x3f6 bmdma 0xfa00 irq 14
[ 2.269304] ata4: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xfa08 irq 15
[ 2.448363] ata3.00: ATAPI: LITE-ON DVDRW SHW-160P6S, PS0A, max UDMA/66
[ 2.480237] ata3.00: configured for UDMA/66
[ 2.480775] ata4: port disabled. ignoring.
[ 2.481610] scsi 2:0:0:0: CD-ROM LITE-ON DVDRW SHW-160P6S PS0A PQ: 0 ANSI: 5
[ 2.483518] sr0: scsi3-mmc drive: 62x/62x writer cd/rw xa/form2 cdda tray
[ 2.483520] Uniform CD-ROM driver Revision: 3.20
[ 2.483585] sr 2:0:0:0: Attached scsi CD-ROM sr0
[ 2.483610] sr 2:0:0:0: Attached scsi generic sg2 type 5