[sane-devel] strange SCSI behaviour

[m. allan noah]

On Sat, 25 Nov 2006, Alessandro Zummo wrote:

>
> 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?

but your inquiry command worked? its just the first epson_cmd_simple that 
fails? try calling test unit ready before this, and see if that works.

do you have a request sense callback setup?

allan

>
> 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.
>
>

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