On 09 April, 2005 - Marcel Holtmann sent me these 1,6K bytes:
> Hi Tomas,
>
> > I have noticed a problem with a race condition fix introduced in
> > 2.4.27-pre2 that causes the kernel to hang when disconnecting a
> > Bluetooth USB dongle or doing 'hciconfig hci0 down'. No message is
> > printed, the kernel just doesn't respond anymore.
> >
> > Seen in Changelog:
> > Marcel Holtmann:
> > o [Bluetooth] Fix race in RX complete routine of the USB drivers
> >
> > Reversing the following patch to hci_usb_rx_complete() makes 2.4.27-pre2
> > up until 2.4.30 happy and does not hang when removing the dongle
> > anymore. (bfusb.c has the same patch applied)
> >
> > 2.6.11.7 does not show the same problem, but has similar code to the
> > "fixed" (that hangs) code in 2.4, so the real problem is probably
> > somewhere else.
>
> does the attached patch makes any difference?
It works just fine with pristine 2.4.30 and this patch. No deadlocks
anymore.
/Tomas
--
Tomas Ögren, [email protected], http://www.acc.umu.se/~stric/
|- Student at Computing Science, University of Umeå
`- Sysadmin at {cs,acc}.umu.se
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