unexpected irq 71 on ip32

[Giuseppe Sacco <giuseppe@eppesuigoccas.homedns.org>]

Hi all,
since 2.6.24 I find this message on the console. The message is
displayed very randomly (or, I cannot find any related event), once or
twice a week.

irq 71, desc: ffffffff803fccf0, depth: 1, count: 0, unhandled: 0
->handle_irq():  ffffffff80069510, handle_bad_irq+0x0/0x2c0
->chip(): ffffffff803f6610, 0xffffffff803f6610
->action(): 0000000000000000
  IRQ_DISABLED set
   IRQ_NOPROBE set

from what I understand, this is an irq related to serial line ttyS1. On
this line I have a modem managed by hylafax, but those messages are
displayed even when there is no activity on the modem line.

Bye,
Giuseppe