Re: 2.6.23-rc1: USB hard disk broken (REGRESSION)

[Mark Lord <lkml@rtr.ca>]

Dan Zwell wrote:
> Alan Stern wrote:
> > > [  126.512815] usb 1-1: usb auto-resume
> > > [  126.543447] uhci_hcd 0000:00:1f.2: port 1 portsc 00a5,01
> > > [  126.559426] usb 1-1: finish resume
> > > [  126.561435] usb 1-1: gone after usb resume? status -19
> > > [  126.561445] usb 1-1: can't resume, status -19
> > > [  126.561451] hub 1-0:1.0: logical disconnect on port 1
> > > [  126.562486] sd 5:0:0:0: [sdb] Result: hostbyte=DID_ERROR 
> > > driverbyte=DRIVER_OK,SUGGEST_OK
> >
> > This suggests a bug in the device's firmware, probably it sends a 
> > 1-byte Device-Status reply instead of a 2-byte reply as required by 
> > the USB spec.  You could find out for certain by using usbmon.
> >
> > But if that is indeed the problem, the patch below should help.  I've 
> > seen it before; perhaps we should adopt this workaround permanently.
> >
> > > Relevant info:
> > > -obviously, I'm using uhci
> > > -the drive is SATA, connected to USB with a SATA/IDE to USB adapter
> > > -this problem does not occur with a USB flash drive
> > > -reverting the commit that introduced auto-suspend prevents this error.
> >
> > If necessary you could disable autosuspend for your drive.  But first 
> > test this patch.
> >
> > Alan Stern
> >
> >
> >
> > Index: 2.6.23-rc1/drivers/usb/core/hub.c
> > ===================================================================
> > --- 2.6.23-rc1.orig/drivers/usb/core/hub.c
> > +++ 2.6.23-rc1/drivers/usb/core/hub.c
> > @@ -1644,9 +1644,10 @@ static int finish_port_resume(struct usb
> >       * and device drivers will know about any resume quirks.
> >       */
> >      if (status == 0) {
> > +        devstatus = 0;
> >          status = usb_get_status(udev, USB_RECIP_DEVICE, 0, &devstatus);
> >          if (status >= 0)
> > -            status = (status == 2 ? 0 : -ENODEV);
> > +            status = (status > 0 ? 0 : -ENODEV);
> >      }
> >  
> >      if (status) {
>
> Alan,
>
> Yes, that patch worked, and dmesg now shows the device auto-suspending 
> and resuming every few seconds. Thanks a lot. I hope you do merge this 
> patch or a workaround like it.
>
> Dan

The same bug kills my Sandisk Cruzer Micro USB pen drives.
I plug them in, they work briefly, then the light goes out (abnormal),
and 30-second timeout/reset is needed for each subsequent access.  Ugh.

They work fine in 2.6.22.  I'll try the above patch here now and see if it fixes
this regression.
-
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