libata-dev#upstream pdc_adma fails IDENTIFY w/ AC_ERR_HSM

[Tejun Heo <htejun@gmail.com>]

Hello,

pdc_adma in libata-dev#upstream fails to IDENTIFY device w/ AC_ERR_HSM.

libata version 2.00 loaded.
pdc_adma 0000:01:02.0: version 0.04
ACPI: PCI Interrupt 0000:01:02.0[A] -> Link [LNKG] -> GSI 5 (level, low) 
-> IRQ 5
[ata_device_add      ] ENTER
[ata_port_add        ] ENTER
[ata_port_start      ] prd alloc, virt f62e1000, dma 362e1000
ata1: PATA max UDMA/66 cmd 0xF881AC00 ctl 0xF881AC38 bmdma 0x0 irq 5
[ata_port_add        ] ENTER
[ata_port_start      ] prd alloc, virt f6304000, dma 36304000
ata2: PATA max UDMA/66 cmd 0xF881AC40 ctl 0xF881AC78 bmdma 0x0 irq 5
[ata_device_add      ] probe begin
scsi0 : pdc_adma
[ata_device_add      ] ata1: bus probe begin
[ata_bus_reset       ] ENTER, host 1, port 0
[ata_bus_softreset   ] ata1: bus reset via SRST
[ata_dev_classify    ] found ATA device by sig
[ata_dev_classify    ] found ATA device by sig
[ata_bus_reset       ] EXIT
ata1.00: ata_dev_read_id: ENTER, host 1, dev 0
[ata_exec_command_mmio] ata1: cmd 0xEC
[adma_intr_mmio      ] ata1: protocol 2 (dev_stat 0x58)
[ata_port_flush_task ] ENTER
[ata_port_flush_task ] flush #1
ata1: ata_port_flush_task: flush #2
ata1: ata_port_flush_task: EXIT
ata1.00: failed to IDENTIFY (I/O error, err_mask=0x2)
[ata_bus_reset       ] ENTER, host 1, port 0
[ata_bus_softreset   ] ata1: bus reset via SRST
[ata_dev_classify    ] found ATA device by sig
[ata_dev_classify    ] found ATA device by sig
[ata_bus_reset       ] EXIT
ata1.00: ata_dev_read_id: ENTER, host 1, dev 0
[ata_exec_command_mmio] ata1: cmd 0xEC
[adma_intr_mmio      ] ata1: protocol 2 (dev_stat 0x58)
[ata_port_flush_task ] ENTER
[ata_port_flush_task ] flush #1
ata1: ata_port_flush_task: flush #2
ata1: ata_port_flush_task: EXIT
ata1.00: failed to IDENTIFY (I/O error, err_mask=0x2)
[ata_bus_reset       ] ENTER, host 1, port 0
[ata_bus_softreset   ] ata1: bus reset via SRST
[ata_dev_classify    ] found ATA device by sig
[ata_dev_classify    ] found ATA device by sig
[ata_bus_reset       ] EXIT
ata1.00: ata_dev_read_id: ENTER, host 1, dev 0
[ata_exec_command_mmio] ata1: cmd 0xEC
[adma_intr_mmio      ] ata1: protocol 2 (dev_stat 0x58)
[ata_port_flush_task ] ENTER
[ata_port_flush_task ] flush #1
ata1: ata_port_flush_task: flush #2
ata1: ata_port_flush_task: EXIT
ata1.00: failed to IDENTIFY (I/O error, err_mask=0x2)
ata1.00: limiting speed to PIO0
ata1.00: disabled
[ata_bus_reset       ] ENTER, host 1, port 0
[ata_bus_softreset   ] ata1: bus reset via SRST
[ata_dev_classify    ] found ATA device by sig
[ata_dev_classify    ] found ATA device by sig
[ata_bus_reset       ] EXIT
[ata_device_add      ] ata1: bus probe end
scsi1 : pdc_adma
[ata_device_add      ] ata2: bus probe begin
[ata_bus_reset       ] ENTER, host 2, port 1
[ata_bus_softreset   ] ata2: bus reset via SRST
ata2: disabling port
[ata_bus_reset       ] EXIT
[ata_device_add      ] ata2: bus probe end
[ata_device_add      ] host probe begin

I've tested both cards and cables Mark sent me (thanks!), and both show 
the same symptom for ATA harddisk and ATAPI cdrom, so this seems to be a 
driver issue.  Any ideas?

Thanks.

-- 
tejun