[sane-devel] Scsi problem with Solaris 2.6

[Henrik Schmidt]

On Thu, 26 Jun 2003, abel deuring wrote:

> Henrik Schmidt schrieb:
> > I'm trying to use a Microtek ScanMaker III with Solaris 2.6 and the scg
> > SCSI driver. I'm using sane-backends 1.0.12 with frontend 1.0.10.
>
> >
> > Jun 25 13:08:25 cortex unix: WARNING:
> > /iommu at f,e0000000/sbus at f,e0001000/espdma at f
> > ,400000/esp at f,800000 (esp0):^M^M
> > Jun 25 13:08:25 cortex unix:    data transfer overrun: current esp state:
>                                    ^^^^^^^^^^^^^^^^^^^^^
> [...]
> > Jun 25 13:08:25 cortex unix: esp:               Cmd dump for Target 5 Lun
> > 0:^M^M
> > Jun 25 13:08:25 cortex unix: esp:               cdblen=6, cdb=[ 0x8 0x0
> > 0x0 0x0
> > 0x91 0x0 ]^M^M
>
> That's a READ of just 0x91 (145) bytes; shouldn't cause any buffer
> overflow, but it's an odd number of bytes. A long shot: It could be that
> the SCG driver does not like to transfer an odd number of bytes.
>
> Matt and Henrik, I'm admittedly too lazy to look closer into the
> Microtek backend, but I guess that it is trying to read a complete scan
> line with one SCSI command. Would it be difficult to change this
> behaviour to read an even number of bytes?
>
> Henrik, a test of my guess should not be too difficult: Just select a
> scan window with an even number of horizontal pixels. (Or perhaps better
> choose a multiple of 4 or 8 as the scan width, just in case that the SCG
> driver or some other Solaris part insists on using the complete bus
> width of 32 or 64 bit)
>

I did test and get the same error with a very small 8x12 scan window.


-- 
Henrik Schmidt                  Christian-Albrechts-Universitaet zu Kiel
Institut fuer Informatik        +49 (431) 880 75 - 50 Fax or 43 Phone
Olshausenstr. 40                http://www.ks.informatik.uni-kiel.de
24098 Kiel, Germany             email: hbs at ks.informatik.uni-kiel.de