linux-kernel - ATAPI/pata

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Date:	Wed, 12 Dec 2007 16:10:25 +0100
From:	Friedrich Göpel <shado23@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Jeff Garzik <jeff@...zik.org>, Tejun Heo <htejun@...il.com>
Subject: ATAPI/pata_amd regression

Hi,

While testing 2.6.24-rc5 I noticed my Plextor DVD writer locking up as
soon I start k3b (KDE CD burning app) with the following:

 ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
 ata5.00: cmd a0/00:00:00:08:00/00:00:00:00:00/a0 tag 0 pio 8 in
          cdb ac 00 00 00 00 00 00 00  00 01 03 00 00 00 00 00
          res 58/00:02:00:08:00/00:00:00:00:00/a0 Emask 0x2 (HSM violation)
 ata5.00: status: { DRDY DRQ }
 ata5: soft resetting link
 ata5.00: qc timeout (cmd 0xa1)
 ata5.00: failed to IDENTIFY (I/O error, err_mask=0x4)
 ata5.00: revalidation failed (errno=-5)
 ata5: failed to recover some devices, retrying in 5 secs
 ata5: port is slow to respond, please be patient (Status 0x80)
 ata5: device not ready (errno=-16), forcing hardreset
 ata5: soft resetting link
 ata5.00: qc timeout (cmd 0xa1)
 ata5.00: failed to IDENTIFY (I/O error, err_mask=0x4)
 ata5.00: revalidation failed (errno=-5)
 ata5: failed to recover some devices, retrying in 5 secs
 ata5: port is slow to respond, please be patient (Status 0x80)
 ata5: device not ready (errno=-16), forcing hardreset
 ata5: soft resetting link
 ata5.00: qc timeout (cmd 0xa1)
 ata5.00: failed to IDENTIFY (I/O error, err_mask=0x4)
 ata5.00: revalidation failed (errno=-5)
 ata5.00: disabled
 ata5: port is slow to respond, please be patient (Status 0x80)
 ata5: device not ready (errno=-16), forcing hardreset
 ata5: soft resetting link
 ata5: EH complete


Whereas doing the same on .23 just yields:

 ata5.00: 16 bytes trailing data
 ata5.00: 16 bytes trailing data
 ata5.00: 16 bytes trailing data
 ata5.00: 16 bytes trailing data


On .24 the drive is completely irresponsive afterwards, until I reboot.
Burning a DVD from a terminal with growisofs works though, if I don't start k3b.


Cheers,


Friedrich Göpel
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