Re: 2.6.20 libata cdrom

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William Thompson wrote:

+scsi2 : ata_piix
+ata_port_schedule_eh: port EH scheduled
+ata_scsi_error: ENTER
+ata_port_flush_task: ENTER
+ata_port_flush_task: flush #1
+ata2: ata_port_flush_task: flush #2
+ata2: ata_port_flush_task: EXIT
+ata_eh_autopsy: ENTER
+ata_eh_recover: ENTER
+ata_eh_prep_resume: ENTER
+ata_eh_prep_resume: EXIT
+__ata_port_freeze: ata2 port frozen
+ata_std_softreset: ENTER
+ata_std_softreset: about to softreset, devmask=1
+ata_bus_softreset: ata2: bus reset via SRST
+ata_dev_classify: found ATA device by sig
+ata_dev_classify: unknown device
+ata_std_softreset: EXIT, classes[0]=1 [1]=5
+ata_std_postreset: ENTER
+ata_std_postreset: EXIT
+ata_eh_thaw_port: ata2 port thawed
+ata_eh_revalidate_and_attach: ENTER
+ata2.00: ata_dev_read_id: ENTER, host 2, dev 0
+ata_exec_command_pio: ata2: cmd 0xEC
+ata_hsm_move: ata2: protocol 2 task_state 1 (dev_stat 0x51)
+ata_hsm_move: ata2: protocol 2 task_state 3 (dev_stat 0x51)
+ata_port_flush_task: ENTER
+ata_port_flush_task: flush #1
+ata2: ata_port_flush_task: flush #2
+ata2: ata_port_flush_task: EXIT
+ata2.00: failed to IDENTIFY (I/O error, err_mask=0x1)
+ata_eh_revalidate_and_attach: EXIT
..

Yep.  Libata seems to be treating the ATAPI drive as ATA.

Tejun, don't we have a fallback for when IDENTIFY fails?
If the drive rejects it (err=0x04), then this can mean only one thing:
unsupported command, so we next must try PACKET_IDENTIFY.

-ml
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