I'm having problems with 1394 in 2.6.12-rc2-mm1.  When I connect my
Apple iSight camera, it is not detected; repeated
connections/disconnections don't help.  When I tried to rmmod all the
appropriate modules (rmmod video1394 raw1394 ohci1394 ieee1394), the
rmmod command hung.  Alt-Sysreq-t shows this:

rmmod         D F75593C0     0  7206   7193                     (NOTLB)
e43fbda0 00000086 e43fbdd0 f75593c0 00000000 00000000 f78bbd20 29b325f2
       000004d2 00000848 2ec09330 000004d2 e0556560 e0556688 f792f258 e43fbdd4
       e43fb000 e43fbdf4 c02ade0e 00000000 e0556560 c01142b0 00000000 00000000
Call Trace:
 [<c02ade0e>] wait_for_completion+0x6e/0xc0
 [<c01fa686>] device_del+0x16/0x70
 [<c01fa6eb>] device_unregister+0xb/0x20
 [<f894f3bd>] nodemgr_remove_ne+0x6d/0x90 [ieee1394]
 [<f894f3eb>] __nodemgr_remove_host_dev+0xb/0x10 [ieee1394]
 [<c01fa749>] device_for_each_child+0x29/0x50
 [<f894f405>] nodemgr_remove_host_dev+0x15/0x40 [ieee1394]
 [<f894c075>] __unregister_host+0x75/0xb0 [ieee1394]
 [<f894ca8d>] highlevel_remove_host+0x2d/0x60 [ieee1394]
 [<f894bb4b>] hpsb_remove_host+0x3b/0x60 [ieee1394]
 [<f897463b>] ohci1394_pci_remove+0x8b/0x250 [ohci1394]
 [<c01c415c>] pci_device_remove+0x2c/0x40
 [<c01fbb6c>] device_release_driver+0x7c/0x80
 [<c01fbb78>] __remove_driver+0x8/0x10
 [<c01fbc53>] driver_for_each_device+0x43/0x70
 [<c01fbb96>] driver_detach+0x16/0x18
 [<c01fb5e6>] bus_remove_driver+0x26/0x40
 [<c01fbd8e>] driver_unregister+0xe/0x20
 [<c01c435e>] pci_unregister_driver+0xe/0x20
 [<c012e73d>] sys_delete_module+0x14d/0x160
 [<c010279f>] sysenter_past_esp+0x54/0x75

This last worked for me in 2.6.12-rc1-mm3; I didn't have a chance to
test -rc1-mm4.

.config attached and lspci attached.

    J