> I am getting the following oops when my system has been idle for
> some time. ...
>
> My machine has an Athlon on a MSI K7 Pro motherboard - this uses the
> AMD 751 (Viper) chipset with 4 usb ports and an OHCI controller. It's
> running the 2.3.99-pre6 kernel.
And my, this looks just like another panic I've seen (Miles! :-)
from an Athlon with a Viper chipset.
I'd suggest pre7-2, on the grounds that some stuff in OHCI did
change (and I can think of a change in pre7-1 that might matter).
Then if that doesn't help, try the attached patch ... it makes that
timer callback a bit more suspicious of its inputs. If it changes
anything for you, it'll mean that timer code got bad inputs.
- Dave
> >>EIP; d2857c65 <[usb-ohci]rh_send_irq+c5/190> <=====
> Trace; d2857d30 <[usb-ohci]rh_int_timer_do+0/60>
> Trace; ffff0000 <END_OF_CODE+2d75bdcc/????>
> Trace; ffff4fff <END_OF_CODE+2d760dcb/????>
> Trace; c011fecc <timer_bh+24c/2a0>
> Trace; c010f144 <timer_interrupt+84/100>
> Trace; c011ce2b <bh_action+1b/70>
> Trace; c011cd68 <tasklet_hi_action+38/60>
> Trace; c011cc5f <do_softirq+4f/70>
> Trace; c010c31d <do_IRQ+ad/c0>
> Trace; c0108c00 <default_idle+0/30>
> Trace; c0108c00 <default_idle+0/30>
> Trace; c010b1fc <ret_from_intr+0/20>
> Trace; c0108c00 <default_idle+0/30>
> Trace; c0108c00 <default_idle+0/30>
> Trace; c0108c23 <default_idle+23/30>
> Trace; c0108c68 <cpu_idle+38/50>
> Trace; c0105000 <empty_bad_page+0/1000>
> Trace; c010018d <L6+0/2>
> Code; d2857c65 <[usb-ohci]rh_send_irq+c5/190>
> 00000000 <_EIP>:
> Code; d2857c65 <[usb-ohci]rh_send_irq+c5/190> <=====
> 0: 8b 00 mov (%eax),%eax <=====
> Code; d2857c67 <[usb-ohci]rh_send_irq+c7/190>
> 2: a9 00 00 1f 00 test $0x1f0000,%eax
There's really only one place it uses that mask,
after reading portstatus [i] ... it's reading that
value which causes the problem. Perhaps "i" is too
big (the patch checks that).
> Code; d2857c6c <[usb-ohci]rh_send_irq+cc/190>
> 7: 74 12 je 1b <_EIP+0x1b> d2857c80
><[usb-ohci]rh_send_irq+e0/190>
> Code; d2857c6e <[usb-ohci]rh_send_irq+ce/190>
> 9: b8 01 00 00 00 mov $0x1,%eax
> Code; d2857c73 <[usb-ohci]rh_send_irq+d3/190>
> e: 8b 4c 24 10 mov 0x10(%esp,1),%ecx
> Code; d2857c77 <[usb-ohci]rh_send_irq+d7/190>
> 12: d3 e0 shl %cl,%eax
Diff
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