On Fri, Nov 07 2003, Nicolas Mailhot wrote:
> Le ven 07/11/2003 � 10:25, Nicolas Mailhot a �crit :
> > Le ven 07/11/2003 � 10:09, Jens Axboe a �crit :
>
> > > Try with this debug patch then, does it work now?
> > >
> > > ===== drivers/scsi/scsi_lib.c 1.77 vs edited =====
> > > --- 1.77/drivers/scsi/scsi_lib.c Tue Oct 14 09:28:06 2003
> > > +++ edited/drivers/scsi/scsi_lib.c Fri Nov 7 10:08:52 2003
> > > @@ -1215,6 +1215,7 @@
> > >
> > > u64 scsi_calculate_bounce_limit(struct Scsi_Host *shost)
> > > {
> > > +#if 0
> > > struct device *host_dev;
> > >
> > > if (shost->unchecked_isa_dma)
> > > @@ -1229,6 +1230,9 @@
> > > * hardware have no practical limit.
> > > */
> > > return BLK_BOUNCE_ANY;
> > > +#else
> > > + return BLK_BOUNCE_HIGH;
> > > +#endif
> > > }
> > >
> > > struct request_queue *scsi_alloc_queue(struct scsi_device *sdev)
> >
> > Will try this evening when I have physical access to the system. (It's
> > difficult to plug a USB device via ssh;)
>
> Well, it does work now (couldn't believe my eyes, tried three times in a
> row just to be sure). Is this supposed to be a definitive fix that will
> be in the next bk snapshots or should I wait for something else ?
No it's not a definitive fix. It was just a test - if it works with the
patch applied, it confirms the theory that usb storage is broken wrt
highmem.
--
Jens Axboe
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