2.6.0-ben1 : Badness in local_bh_enable at kernel/softirq.c:121

[Kiko Piris <debian@pirispons.net>]

Hi,

today I rsynced BenH's kernel tree, compiled it and it seems to work
without problems.

I connect my iBook to the Internet with a serial (rs232) modem with an
usb-serial (ftdi_sio module) converter cable (btw, usb-serial didn't
work with 2.6.0-test11).

Apparently it works, it dials and connects ok. But when the ppp
connection is stablished, the syslog is flooded with messages of this
kind:

| Dec 18 21:07:18 [kernel] Badness in local_bh_enable at kernel/softirq.c:121
| Dec 18 21:07:18 [kernel] Call trace:
| Dec 18 21:07:18 [kernel] [c000b1ec] dump_stack+0x18/0x28
| Dec 18 21:07:18 [kernel] [c0008478] check_bug_trap+0x84/0xac
| Dec 18 21:07:18 [kernel] [c00085d0] ProgramCheckException+0x130/0x170
| Dec 18 21:07:18 [kernel] [c0007ba0] ret_from_except_full+0x0/0x4c
| Dec 18 21:07:18 [kernel] [c001fdf8] local_bh_enable+0x1c/0x44
| Dec 18 21:07:18 [kernel] [c00e5c8c] flush_to_ldisc+0x84/0xb8
| Dec 18 21:07:18 [kernel] [db06f8c4] ftdi_read_bulk_callback+0x328/0x48c [ftdi_sio]
| Dec 18 21:07:18 [kernel] [db39f518] usb_hcd_giveback_urb+0x34/0x50 [usbcore]
| Dec 18 21:07:18 [kernel] [db1617ec] finish_urb+0x6c/0xe8 [ohci_hcd]
| Dec 18 21:07:18 [kernel] [db162dec] dl_done_list+0x130/0x134 [ohci_hcd]
| Dec 18 21:07:18 [kernel] [db163864] ohci_irq+0xb0/0x1e0 [ohci_hcd]
| Dec 18 21:07:18 [kernel] [db39f57c] usb_hcd_irq+0x48/0x84 [usbcore]
| Dec 18 21:07:18 [kernel] [c00091a8] ppc_irq_dispatch_handler+0x1b4/0x218
| Dec 18 21:07:18 [kernel] [c0009274] do_IRQ+0x68/0x104
| Dec 18 21:07:18 [kernel] [c0007bec] ret_from_except+0x0/0x14

ad infinitum.

This "badness" message: is it any kind of error? Or is it some debug
switch that must be turned off?.

Indeed, the connection (and the system) works fine, and when I stop it
with poff, the messages stop flooding syslog.

Anyway, is there anything I can do to "fix" it? (or to stop the flooding
messages if there's nothing to be fixed).

Please let me know if I must provide any additional info.

Thanks in advance.

-- 
Kiko

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Thanks.