Hi,

On one of my test boxes I'm unable to do just about anything with audio CDs
using the current -git (2.6.24 is fine in that respect on the same box).

When an audio CD is inserted into the drive, I get the following errors in
dmesg and nothing more happens (quite obviously):

ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata1.00: cmd a0/01:00:00:10:00/00:00:00:00:00/a0 tag 0 dma 16400 in
         cdb 42 02 40 01 00 00 00 00  10 00 00 00 00 00 00 00
         res 40/00:00:00:18:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
ata1.00: status: { DRDY }
ata1: soft resetting link
ata1.00: configured for UDMA/33
ata1: EH complete
ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
ata1.00: cmd a0/01:00:00:10:00/00:00:00:00:00/a0 tag 0 dma 16400 in
         cdb 42 02 40 01 00 00 00 00  10 00 00 00 00 00 00 00
         res 40/00:00:00:18:00/00:00:00:00:00/a0 Emask 0x4 (timeout)
ata1.00: status: { DRDY }
ata1: port is slow to respond, please be patient (Status 0x80)
ata1: device not ready (errno=-16), forcing hardreset
ata1: soft resetting link
ata1.00: qc timeout (cmd 0xa1)
ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata1.00: revalidation failed (errno=-5)
ata1: failed to recover some devices, retrying in 5 secs
ata1: port is slow to respond, please be patient (Status 0x80)
ata1: device not ready (errno=-16), forcing hardreset
ata1: soft resetting link
ata1.00: qc timeout (cmd 0xa1)
ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata1.00: revalidation failed (errno=-5)
ata1: failed to recover some devices, retrying in 5 secs
ata1: port is slow to respond, please be patient (Status 0x80)
ata1: device not ready (errno=-16), forcing hardreset
ata1: soft resetting link
ata1.00: qc timeout (cmd 0xa1)
ata1.00: failed to IDENTIFY (I/O error, err_mask=0x4)
ata1.00: revalidation failed (errno=-5)
ata1.00: disabled

where ata1 is:

scsi0 : pata_ali
scsi1 : pata_ali
ata1: PATA max UDMA/133 cmd 0x1f0 ctl 0x3f6 bmdma 0xff00 irq 14
ata2: PATA max UDMA/133 cmd 0x170 ctl 0x376 bmdma 0xff08 irq 15
ata1.00: ATAPI: TSSTcorpCD/DVDW SH-S182M, SB03, max UDMA/33
ata1.00: configured for UDMA/33
scsi 0:0:0:0: CD-ROM            TSSTcorp CD/DVDW SH-S182M SB03 PQ: 0 ANSI: 5

(full dmesg attached).

I can't reproduce this problem on my other test boxes, so I think it's related
to pata_ali rather than anything else.

In principle I can try to find the commit that caused this problem to occur,
but that would be rather tedious, so if anyone has any ideas of what's up,
please let me know.

Thanks,
Rafael