Miles Lane wrote at lkml:
BUG: warning at drivers/ieee1394/ohci1394.c:235/get_phy_reg()
[<c0103999>] show_trace_log_lvl+0x53/0xff
[<c0103ff1>] show_trace+0x16/0x19
[<c0104037>] dump_stack+0x1a/0x1f
[<f9295ade>] get_phy_reg+0x77/0xe4 [ohci1394]
[<f9295e66>] ohci_devctl+0x49/0x56c [ohci1394]
[<f9298e82>] ohci_irq_handler+0x329/0x720 [ohci1394]
[<c01435cd>] handle_IRQ_event+0x18/0x4d
[<c01443fb>] handle_fasteoi_irq+0x57/0x95
[<c01050bf>] do_IRQ+0xa1/0xc6
[<c0103475>] common_interrupt+0x25/0x2c
BUG: warning at drivers/ieee1394/ohci1394.c:264/set_phy_reg()
[<c0103999>] show_trace_log_lvl+0x53/0xff
[<c0103ff1>] show_trace+0x16/0x19
[<c0104037>] dump_stack+0x1a/0x1f
[<f9295a14>] set_phy_reg+0x84/0xd7 [ohci1394]
[<f9295e79>] ohci_devctl+0x5c/0x56c [ohci1394]
[<f9298e82>] ohci_irq_handler+0x329/0x720 [ohci1394]
[<c01435cd>] handle_IRQ_event+0x18/0x4d
[<c01443fb>] handle_fasteoi_irq+0x57/0x95
[<c01050bf>] do_IRQ+0xa1/0xc6
[<c0103475>] common_interrupt+0x25/0x2c
Above trace seems to appear due to a hack to get certain FireWire
controllers going: Apple UniNorth, NVidia nForce2. Miles, do you have
one of those?
A similar trace occurs as ohci_irq_handler -> hpsb_selfid_complete
-> highlevel_host_reset -> csr.c::host_reset -> {ohci_}hw_csr_reg ->
mdelay. This host_rest's purpose is to mark iso channel 31 as default
broadcast channel. This functionality can probably be moved into a
workqueue job or into nodemgr's kthread. This is currently being tracked
as http://bugzilla.kernel.org/show_bug.cgi?id=6070 but I am afraid
nobody is actively working on it yet.
--
Stefan Richter
-=====-=-==- -==- -=-=-
http://arcgraph.de/sr/
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