Re: iRiver H100 series and usb-storage issues

[Philippe Troin <phil@fifi.org>]

Alan Stern <stern@rowland.harvard.edu> writes:

> I just noticed this thread on linux-kernel:
> 
> http://marc.theaimsgroup.com/?l=linux-kernel&m=108372064000188&w=2
> 
> Apparently under some circumstances the iRiver H100 returns 0 bytes 
> transferred with GOOD status and residue=512 for a READ(10) command 
> asking for 1 sector.  As far as I know this is legal, and it indicates the 
> command should simply be retried.

That's correct.  However, the iRiver H1xx will also commit a USB
protocol violation by not returning a CSW (Command Status
Wrapper).  That's what screws up the transfer.
 
> But apparently the sd driver doesn't realize what has happened and assumes 
> the transfer was successful.  If I'm right then the sd driver should be 
> fixed, but I'm not sure what is the best thing to do.

I am not sure the SCSI layer can recover given that the USB layer is
confused...

Please note that:

 1. I am just repeating what I have been told by various people and
    claim no knowledge of the USB or SCSI layers.  In other words, I
    could be all wrong :-)

 2. I do not own a H1xx anymore, having returned mine.
 
Phil.