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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1394032

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

** Tags added: trusty

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https://bugs.launchpad.net/bugs/1394032

Title:
  Trusty isci module doesn't handle timeouts properly

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  I'm currently running linux 3.13.0-39 on trusty with a disks plugged
  into an Intel C602 SATA/SAS controller.  Occasionally, a timeout
  and/or SAS event (I'm not 100% sure which..) isn't handled properly
  ('Unhandled error code') and  the kernel gets a bit upset.

  I have 12 different hosts with this controller and disk combination
  and all display the same behaviour (dmesg output):

  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg] command ffff8808434fa600 timed out
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg] command ffff880843673d00 timed out
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg] command ffff88105081bc00 timed out
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg] command ffff88084378e100 timed out
  [Tue Nov 18 16:56:10 2014] sas: Enter sas_scsi_recover_host busy: 4 failed: 4
  [Tue Nov 18 16:56:10 2014] sas: ata7: end_device-7:0: cmd error handler
  [Tue Nov 18 16:56:10 2014] sas: ata7: end_device-7:0: dev error handler
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg] Unhandled error code
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg]
  [Tue Nov 18 16:56:10 2014] Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg] CDB:
  [Tue Nov 18 16:56:10 2014] Write(10): 2a 00 04 9e 77 60 00 00 08 00
  [Tue Nov 18 16:56:10 2014] end_request: I/O error, dev sdg, sector 77494112
  [Tue Nov 18 16:56:10 2014] EXT4-fs warning (device dm-2): ext4_end_bio:317: I/O error -5 writing to inode 261733 (offset 0 size 0 starting block 5061868)
  [Tue Nov 18 16:56:10 2014] Buffer I/O error on device dm-2, logical block 5061868
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg] Unhandled error code
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg]
  [Tue Nov 18 16:56:10 2014] Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg] CDB:
  [Tue Nov 18 16:56:10 2014] Write(10): 2a 00 04 0f d0 e0 00 00 08 00
  [Tue Nov 18 16:56:10 2014] end_request: I/O error, dev sdg, sector 68145376
  [Tue Nov 18 16:56:10 2014] EXT4-fs warning (device dm-2): ext4_end_bio:317: I/O error -5 writing to inode 261710 (offset 0 size 0 starting block 3893276)
  [Tue Nov 18 16:56:10 2014] Buffer I/O error on device dm-2, logical block 3893276
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg] Unhandled error code
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg]
  [Tue Nov 18 16:56:10 2014] Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg] CDB:
  [Tue Nov 18 16:56:10 2014] Write(10): 2a 00 02 b8 a1 f8 00 00 08 00
  [Tue Nov 18 16:56:10 2014] end_request: I/O error, dev sdg, sector 45654520
  [Tue Nov 18 16:56:10 2014] Buffer I/O error on device dm-2, logical block 1081919
  [Tue Nov 18 16:56:10 2014] lost page write due to I/O error on dm-2
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg] Unhandled error code
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg]
  [Tue Nov 18 16:56:10 2014] Result: hostbyte=DID_OK driverbyte=DRIVER_TIMEOUT
  [Tue Nov 18 16:56:10 2014] sd 7:0:0:0: [sdg] CDB:
  [Tue Nov 18 16:56:10 2014] Write(10): 2a 00 02 b8 a1 58 00 00 08 00
  [Tue Nov 18 16:56:10 2014] end_request: I/O error, dev sdg, sector 45654360
  [Tue Nov 18 16:56:10 2014] Buffer I/O error on device dm-2, logical block 1081899
  [Tue Nov 18 16:56:10 2014] lost page write due to I/O error on dm-2
  [Tue Nov 18 16:56:10 2014] sas: --- Exit sas_scsi_recover_host: busy: 0 failed: 0 tries: 1

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