Linux scsi / usb-mass-storage and HP printer cardreader bug + fix
Hans de Goede
j.w.r.degoede at hhs.nl
Fri Jan 11 12:48:31 UTC 2008
Boaz Harrosh wrote:
> On Thu, Jan 10 2008 at 12:52 +0200, Hans de Goede <j.w.r.degoede at hhs.nl> wrote:
>>> I'm not sure what the proper solution should be?
>>>
>> I guess the proper solution would be to add a special case to the scsi layer
>> where the read10 / write10 command is issued, and split the request in 2 there
>> when it involves the last sector.
>>
>> There was another reply in this thread stating that problems reading the last
>> sector with sd / mmc cards happen quite often, and that this is most likely not
>> an isolated case.
>>
>> Regards,
>>
>> Hans
>
> Yes, you're right. in ULDs it is a much proper way to do this.
>
> So I guess you'll have to do that special host flag or device
> flag, and add a check for it in sd.c. You'll see that sd.c is
> already doing bufflen truncation at sd_prep_fn(), just add one
> more case.
>
Yes,
That will work nicely, I'll write an updated patch this evening (when I have
access to the printer to test again).
Regards,
Hans
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