[sane-devel] strange SCSI behaviour

[Alessandro Zummo]

 Hello,

   I just discovered the problem I had with my FilmScan 200
 is not related to any particular command but just to the
 first one sent to the scanner (just after modprobe)

  After that one, which receives a sense condition, everything
 works perfectly.

  So, if there's a way to have the control immediately returned
 to the driver as soon as the sense condition is issued, I would
 just try reissuing the command and that should fix my problem.

  Any hint on how to do that?

 thanks!

[epson2] inquiry: EPSON   FilmScan 200    1.01
[epson2] model  : FilmScan 200    1.01
[epson2] reset
[epson2] epson_cmd_simple: size = 2
[epson2] epson_send: ESC @
[sanei_scsi] scsi_req_enter: entered 0xb7c75008
[sanei_scsi] sanei_scsi.issue: 0xb7c75008
[sanei_scsi] scsi_req_enter: queue_used: 1, queue_max: 1
[sanei_scsi] sanei_scsi_req_wait: waiting for 0xb7c75008
[sanei_scsi] sanei_scsi.issue: 0xb7c75008
[sanei_scsi] sanei_scsi_req_wait: read 64 bytes
[sanei_scsi] sanei_scsi_req_wait: SCSI command complained: Success
[sanei_scsi] sense buffer: 70 00 06 00 00 00 00 00 00 00 00 00 00 00 00 00
[sanei_scsi] target status: 02 host status: 0000 driver status: 0008
[sanei_scsi] sanei_scsi_req_wait: SG driver returned resid 2
[sanei_scsi]                      NOTE: This value may be bogus
[sanei_scsi] scsi_req_enter: entered 0xb7c75008
[sanei_scsi] sanei_scsi.issue: 0xb7c75008
[sanei_scsi] scsi_req_enter: queue_used: 1, queue_max: 1
[sanei_scsi] sanei_scsi_req_wait: waiting for 0xb7c75008
[sanei_scsi] sanei_scsi.issue: 0xb7c75008

 [~2 min delay here, the the aic7xxx driver queues an ABORT and the scanner resets ]

[sanei_scsi] sanei_scsi_req_wait: read 64 bytes
[sanei_scsi] sanei_scsi_req_wait: SCSI command complained: Success
[sanei_scsi] sense buffer: 70 00 06 00 00 00 00 00 00 00 00 00 00 00 00 00
[sanei_scsi] target status: 00 host status: 0001 driver status: 0000
[sanei_scsi] sanei_scsi_req_wait: SG driver returned resid 1
[sanei_scsi]                      NOTE: This value may be bogus
[epson2] epson_recv: expected = 1, got = 0
[epson2] epson_cmd_simple: failed, Device busy

 this command has failed, but subsequent ones work
 correctly.   

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Turin, Italy

  http://www.towertech.it