On Wed, Sep 10, 2003 at 03:24:09PM -0600, Pat LaVarre wrote:
> 
> > The reason for the unsolicited REQUEST-SENSE ...
> 
> Help, lost me.
> 
> I'm thinking usb-storage auto sense should always and only follow
> bCSWStatus = x01 Failed.  I'm thinking unsolicited auto sense should
> occur only if the layers above request such an abuse - never
> automagically.
> 
> I'm thinking not injecting unsolicited auto sense is a part of the
> unwritten specification that "everyone knows" helps hosts get along with
> devices.
> 
> No?  Where have I gone wrong?

Experience tells us that this is a flawed algorithm.

> > Since sgp_dd asked for a 64-byte
> > READ-CAPACITY, it gets what it deserves.
> 
> Ah, here we educate me.
> 
> I should prepare and forward a patch to correct sgp_dd?
> 
> We the community now broadly accept this rule?  We say apps own the job
> of keeping the bus "on the thin diagonal" i.e. asking for precisely the
> expected count of data bytes?

Yes.

Matt

-- 
Matthew Dharm                              Home: mdharm-usb@one-eyed-alien.net 
Maintainer, Linux USB Mass Storage Driver

Somebody call an exorcist!
					-- Dust Puppy
User Friendly, 5/16/1998