Re: [usb-storage] BUG: SCSI: usb storage SDHC card doesn't work in2.6.27-rc1

[Douglas Gilbert]

Matthew Frost wrote:
> --- Matthew Frost <artusemrys@xxxxxxxxxxxxx> wrote:
>
> > Alan Stern wrote:
> > > > The patches to fix this that I have tried do not apply
> > > > cleanly to lk 2.6.26 (and break during compile if forced:
> > > > "us->fflags" is not defined).
> > > >
> > > > Is there a lk 2.6.26 patch available?
> > > Sorry about that; my patches are against the USB development tree and
> > > I tend to forget to redo them against the vanilla kernel.  Below is a
> > > patch against 2.6.26.  Or you can just edit the original patch and
> > > change the occurrences of "fflags" to "flags".
> > >
> > > Alan Stern
> > >
> > >
> > > Index: 2.6.26/drivers/usb/storage/transport.c
> > > ===================================================================
> > > --- 2.6.26.orig/drivers/usb/storage/transport.c
> > > +++ 2.6.26/drivers/usb/storage/transport.c
> > > @@ -1034,8 +1034,21 @@ int usb_stor_Bulk_transport(struct scsi_
> > >  
> > >  	/* try to compute the actual residue, based on how much data
> > >  	 * was really transferred and what the device tells us */
> > > -	if (residue) {
> > > -		if (!(us->flags & US_FL_IGNORE_RESIDUE)) {
> > > +	if (residue && !(us->flags & US_FL_IGNORE_RESIDUE)) {
> > > +
> > > +		/* Heuristically detect devices that generate bogus residues
> > > +		 * by seeing what happens with INQUIRY and READ CAPACITY
> > > +		 * commands.
> > > +		 */
> > > +		if (bcs->Status == US_BULK_STAT_OK &&
> > > +				scsi_get_resid(srb) == 0 &&
> > > +					((srb->cmnd[0] == INQUIRY &&
> > > +						transfer_length == 36) ||
> > > +					(srb->cmnd[0] == READ_CAPACITY &&
> > > +						transfer_length == 8))) {
> > > +			us->flags |= US_FL_IGNORE_RESIDUE;
> > > +
> > > +		} else {
> > >  			residue = min(residue, transfer_length);
> > >  			scsi_set_resid(srb, max(scsi_get_resid(srb),
> > >  			                                       (int) residue));
> > Thanks!  I've been trying to fix it manually, and it wouldn't work.  Trying
> > this version now.  Let's see if this fixes my problem.
> >
> > Matt Frost

The above patch made my USB key:
  Alcor Micro Corp. Transcend JetFlash 110 USB 2.0 Flash Drive (2GB)
usable in a pretty clean lk 2.6.26 .

Thanks
Doug Gilbert



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