Badness in ohci-hcd

Hi,

Disconnecting a GPRS modem (cdc-acm, compiled as module) from an iBook G4 running 2.6.1-ben1 gives the following log:

usb 4-1: USB disconnect, address 3
Badness in ohci_endpoint_disable at drivers/usb/host/ohci-hcd.c:334

Call trace:
 [c000ba60] dump_stack+0x18/0x28
 [c0008ce0] check_bug_trap+0x84/0xac
 [c0008e2c] ProgramCheckException+0x124/0x154
 [c00083b4] ret_from_except_full+0x0/0x4c
 [eb04729c] ohci_endpoint_disable+0xa4/0x174 [ohci_hcd]
 [c01a54e0] hcd_endpoint_disable+0x118/0x190
 [c01a6a20] usb_disable_endpoint+0xa8/0xac
 [c01a6b64] usb_disable_device+0xcc/0xd8
 [c01a06e8] usb_disconnect+0x9c/0x134
 [c01a3328] hub_port_connect_change+0x2e8/0x2ec
 [c01a361c] hub_events+0x2f0/0x358
 [c01a36c0] hub_thread+0x3c/0xf8
 [c000b10c] kernel_thread+0x44/0x60

pppd hangs and does not exit after sending it a SIGHUP, too. I don't know if this is related...

Colin