devd(8) complains loudly when DVD player is empty, possibly due to r298134

[Trond Endrestøl]

Hi,

The symptoms began after upgrading from stable/10 r298033 to stable/10 r298573.

Apr 27 18:40:00 <user.info> [HOSTNAME] devd: Processing event '!system=CAM subsystem=periph type=error device=cd0 serial="R8KL6GKC900AFG" cam_status="0xcc" scsi_status=2 scsi_sense="70 02 04 01" CDB="00 00 00 00 00 00 " '

These messages are just seconds apart:

Apr 27 18:40:01 <user.info> [HOSTNAME] devd: Processing event '!system=CAM subsystem=periph type=error device=pass1 serial="R8KL6GKC900AFG" cam_status="0xcc" scsi_status=2 scsi_sense="70 02 04 01" CDB="00 00 00 00 00 00 " '
Apr 27 18:40:03 <user.info> [HOSTNAME] devd: Processing event '!system=CAM subsystem=periph type=error device=pass1 serial="R8KL6GKC900AFG" cam_status="0xcc" scsi_status=2 scsi_sense="70 02 04 01" CDB="00 00 00 00 00 00 " '
Apr 27 18:40:05 <user.info> [HOSTNAME] devd: Processing event '!system=CAM subsystem=periph type=error device=pass1 serial="R8KL6GKC900AFG" cam_status="0xcc" scsi_status=2 scsi_sense="70 02 04 01" CDB="00 00 00 00 00 00 " '

When I put a CD or DVD in the DVD player, the messages stop. As soon 
as I eject the disc, they start appearing again.

Here's the relevant part from dmesg:

cd0 at ahcich1 bus 0 scbus1 target 0 lun 0
cd0: <TSSTcorp DVD+-RW SN-208BB D500> Removable CD-ROM SCSI device
cd0: Serial Number R8KL6GKC900AFG
cd0: 150.000MB/s transfers (SATA 1.x, UDMA5, ATAPI 12bytes, PIO 8192bytes)
cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed

This is on a mid-2012 Dell Latitude E5530 with the stock DVD player.

Upgrading to stable/10 r298705 doesn't resolve this issue.

Does anyone else see this?

Maybe r298134 is to blame:

  stable/10/sys/cam/cam_periph.c

  MFC r298004:

  Add a devctl/devd notification conduit for CAM errors that happen at the
  periph level.

  Due to not merging the changes to ata_res_sbuf(), this version is a little
  messy.

  Sponsored by:	Netflix

http://svnweb.freebsd.org/base?view=revision&revision=298134

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