[lkml]   [2007]   [Jul]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [linux-usb-devel] usb-storage autosuspend bug?

On Fri, 27 Jul 2007, Alan Stern wrote:
> I don't think it's a refcounting problem. My guess is that the
> underlying cause is the bug in your urb->status removal patch for
> usb_start_wait_urb() -- the one I fixed here:
> Of course, my guess could be wrong. I haven't tried to recreate
> Linus's bug with that patch reverted. But with the patch present I was
> not able to duplicate the bug.

I finally got around to testing this, and while I still have problems with
that reader, I can't reproduce the oops with that patch in place either.

Of course, I only ever saw the oops once, so I really don't know how
reproducible it was. Maybe you have to remove the USB reader at _just_ the
right moment. But I did get

usb 2-6: reset high speed USB device using ehci_hcd and address 4
usb 2-6: USB disconnect, address 4
sd 6:0:0:1: [sdc] Result: hostbyte=0x07 driverbyte=0x00
end_request: I/O error, dev sdc, sector 1999855
scsi 6:0:0:1: rejecting I/O to dead device

so the testing was done with the kind of behaviour that resulted in an
oops and a dead khubd last time around.

So I guess I'll ack the patch for whatever that is worth.

Over to you, Greg..

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2007-07-30 05:03    [W:0.051 / U:2.680 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site