Messages in this thread | | | Date | Fri, 21 Mar 2008 17:31:11 +0100 | From | Stefan Richter <> | Subject | Re: nobody cared about IRQ 19 (firewire, on a HP 2510p notebook) |
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Martin Michlmayr wrote: > I just got the following in dmesg a few minutes after booting my > notebook which was idle at the time this occurred. This was with > 2.6.25-rc6 but I've seen the same with 2.6.22 (see the attached > dmesg from 2.6.22). > > irq 19: nobody cared (try booting with the "irqpoll" option) > Pid: 0, comm: swapper Not tainted 2.6.25-rc6-amd64 #1 > > Call Trace: > <IRQ> [<ffffffff80271c0b>] __report_bad_irq+0x38/0x7c > [<ffffffff80271e51>] note_interrupt+0x202/0x249 > [<ffffffff8027274e>] handle_fasteoi_irq+0xab/0xd0 > [<ffffffff8020f82c>] do_IRQ+0x6e/0xda > [<ffffffff8020c65d>] ret_from_intr+0x0/0x19 > <EOI> [<ffffffff80221831>] ? native_irq_enable+0x6/0x7 > [<ffffffff88006330>] ? :processor:acpi_idle_enter_bm+0x2ab/0x325 > [<ffffffff803b5ef3>] ? menu_select+0x70/0x99 > [<ffffffff803b52e1>] ? cpuidle_idle_call+0x77/0xa6 > [<ffffffff803b526a>] ? cpuidle_idle_call+0x0/0xa6 > [<ffffffff8020b187>] ? cpu_idle+0xb1/0xdb > [<ffffffff8042ea16>] ? rest_init+0x5a/0x5c > > handlers: > [<ffffffff8806f0f5>] (irq_handler+0x0/0x207 [firewire_ohci]) > Disabling IRQ #19 ... > 02:06.1 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 04) ...
According to your 2.6.22 dmesg, this happens a while after the firewire subsystem seemingly successfully initialized the controller. Could you please post "dmesg | grep firewire" from 2.6.25-rc6 though?
The __report_bad_irq() and "Disabling IRQ #..." can only have happened because this condition in fw-ohci.c::irq_handler()
event = reg_read(ohci, OHCI1394_IntEventClear);
if (!event || !~event) return IRQ_NONE;
happened a lot of times. This means either - Some MMIO reads return bogus values (all zero or all ones in a bitfield which should be sparsely populated in a proper interrupt event), or - the interrupt was misrouted by the kernel's IRQ infrastructure was unable to detect the misrouting, AFAIU. -- Stefan Richter -=====-==--- --== =-=-= http://arcgraph.de/sr/
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