On Wed, Oct 04, 2006 at 08:45:43AM +0200, Jarek Poplawski wrote:
> On Tue, Oct 03, 2006 at 10:43:09PM -0700, Greg KH wrote:
> > On Wed, Oct 04, 2006 at 07:43:08AM +0200, Jarek Poplawski wrote:
> > > On 29-09-2006 13:45, Axel C. Voigt wrote:
> ...
> > > > Sep 29 13:29:53 mcs70 kernel: =================================
> > > > Sep 29 13:29:53 mcs70 kernel: [ INFO: inconsistent lock state ]
> > > > Sep 29 13:29:53 mcs70 kernel: ---------------------------------
> > > > Sep 29 13:29:53 mcs70 kernel: inconsistent {hardirq-on-W} -> {in-hardirq-W} usage.
> > > > Sep 29 13:29:53 mcs70 kernel: startDV24/3864 [HC1[1]:SC0[0]:HE0:SE1] takes:
> > > > Sep 29 13:29:53 mcs70 kernel: (&acm->read_lock){++..}, at: [<e08952d8>] acm_read_bulk+0x60/0xde [cdc_acm]
> > > > Sep 29 13:29:53 mcs70 kernel: {hardirq-on-W} state was registered at:
> ...
> > > It looks in drivers/usb/class/cdc-acm.c acm_rx_tasklet could be preempted
> > > with acm->read_lock by acm_read_bulk which uses the same lock from hardirq
> > > context.
> > >
> > > So probably spin_lock_irqsave is needed.
> >
> > Yup. Care to send a patch?
>
> If it could help?
Great, care to resend this to me with a signed-off-by: line?
thanks,
greg k-h
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
