[Bug 982213] [NEW] SG_IO v3 "ATA IDENTIFY DEVICE" command from ata_id hoses bridge

[Tormod Volden]

Public bug reported:

I have Ubuntu 12.04 installed on an external hard drive, where the disk
enclosure has a Cypress CY7C68300A EZ-USB AT2 USB 2.0 to ATA/ATAPI
bridge.

At boot, the udev rules probes the drive with /lib/udev/ata_id and this
makes the bridge lock up and the disk unavailable. After 30 seconds a
scsi reset is issued and the drive comes back. I have traced this down
to the "v3" fallback of extras/ata_id/ata_id.c:187. When patching this
ioctl away everything is fine.

Another workaround would be to change the udev rules to not call ata_id
when this particular bridge is detected. ata_id does not return anything
for this drive on my setup anyway.

lsusb:
Bus 002 Device 003: ID 04b4:6830 Cypress Semiconductor Corp. CY7C68300A EZ-USB AT2 USB 2.0 to ATA/ATAPI

** Affects: udev (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/982213

Title:
  SG_IO v3 "ATA IDENTIFY DEVICE" command from ata_id hoses bridge

Status in “udev” package in Ubuntu:
  New

Bug description:
  I have Ubuntu 12.04 installed on an external hard drive, where the
  disk enclosure has a Cypress CY7C68300A EZ-USB AT2 USB 2.0 to
  ATA/ATAPI bridge.

  At boot, the udev rules probes the drive with /lib/udev/ata_id and
  this makes the bridge lock up and the disk unavailable. After 30
  seconds a scsi reset is issued and the drive comes back. I have traced
  this down to the "v3" fallback of extras/ata_id/ata_id.c:187. When
  patching this ioctl away everything is fine.

  Another workaround would be to change the udev rules to not call
  ata_id when this particular bridge is detected. ata_id does not return
  anything for this drive on my setup anyway.

  lsusb:
  Bus 002 Device 003: ID 04b4:6830 Cypress Semiconductor Corp. CY7C68300A EZ-USB AT2 USB 2.0 to ATA/ATAPI

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