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Subject[Bisected] [-next-20130204] usb/hcd: irq 18: nobody cared
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On Tue, 2013-02-05 at 15:26 -0500, Alan Stern wrote:
> On Tue, 5 Feb 2013, Peter Hurley wrote:
>
> > With -next-20130204:
> >
> > [ 33.855570] irq 18: nobody cared (try booting with the "irqpoll" option)
> > [ 33.855580] Pid: 0, comm: swapper/4 Not tainted 3.8.0-next-20130204-xeon #20130204
> > [ 33.855582] Call Trace:
> > [ 33.855585] <IRQ> [<ffffffff810f1076>] __report_bad_irq+0x36/0xe0
> > [ 33.855600] [<ffffffff810f152a>] note_interrupt+0x1aa/0x200
> > [ 33.855606] [<ffffffff8101edf2>] ? mwait_idle+0x82/0x1b0
> > [ 33.855610] [<ffffffff810eed89>] handle_irq_event_percpu+0xc9/0x260
> > [ 33.855614] [<ffffffff810eef68>] handle_irq_event+0x48/0x70
> > [ 33.855618] [<ffffffff810f20ba>] handle_fasteoi_irq+0x5a/0x100
> > [ 33.855624] [<ffffffff810182f2>] handle_irq+0x22/0x40
> > [ 33.855630] [<ffffffff816e2a9a>] do_IRQ+0x5a/0xd0
> > [ 33.855636] [<ffffffff816d97ad>] common_interrupt+0x6d/0x6d
> > [ 33.855638] <EOI> [<ffffffff810f8e2a>] ? rcu_eqs_enter_common+0x4a/0x320
> > [ 33.855646] [<ffffffff8101edf2>] ? mwait_idle+0x82/0x1b0
> > [ 33.855649] [<ffffffff8101ed99>] ? mwait_idle+0x29/0x1b0
> > [ 33.855653] [<ffffffff8101f8a6>] cpu_idle+0x116/0x130
> > [ 33.855658] [<ffffffff816c0c0f>] start_secondary+0x251/0x258
> > [ 33.855660] handlers:
> > [ 33.855664] [<ffffffff814f98a0>] usb_hcd_irq
> > [ 33.855667] Disabling IRQ #18
> >
> > From earlier in the boot log:
> > [ 1.297020] uhci_hcd 0000:00:1d.2: setting latency timer to 64
> > [ 1.297032] uhci_hcd 0000:00:1d.2: UHCI Host Controller
> > [ 1.297040] uhci_hcd 0000:00:1d.2: new USB bus registered, assigned bus number 4
> > [ 1.297076] uhci_hcd 0000:00:1d.2: irq 18, io base 0x0000ff40
> > [ 1.297213] hub 4-0:1.0: USB hub found
> > [ 1.297221] hub 4-0:1.0: 2 ports detected
> >
> > lsusb:
> > ...
> > Bus 004 Device 002: ID 0764:0501 Cyber Power System, Inc. CP1500 AVR UPS
> > Bus 004 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver

[...]

> If the suggestion above doesn't work out, bisection may be the best way
> to find the answer.

This bad irq bisected to:

4f535093cf8f6da8cfda7c36c2c1ecd2e9586ee4 is the first bad commit
commit 4f535093cf8f6da8cfda7c36c2c1ecd2e9586ee4
Author: Yinghai Lu <yinghai@kernel.org>
Date: Mon Jan 21 13:20:52 2013 -0800

PCI: Put pci_dev in device tree as early as possible

We want to put pci_dev structs in the device tree as soon as possible so
for_each_pci_dev() iteration will not miss them, but driver attachment
needs to be delayed until after pci_assign_unassigned_resources() to make
sure all devices have resources assigned first.

This patch moves device registering from pci_bus_add_devices() to
pci_device_add(), which happens earlier, leaving driver attachment in
pci_bus_add_devices().

It also removes unattached child bus handling in pci_bus_add_devices().
That's not needed because child bus via pci_add_new_bus() is already
in parent bus children list.

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

:040000 040000 0540c98d04d00de24b4e12fa750f6cd26c5addd2 2e24946cb7165a4028b7efb0a622271cc3990005 M drivers

All is fine if I revert these 2 commits:

40064ac PCI: Remove unused "rc" in virtfn_add_bus()
4f53509 (HEAD, refs/bisect/bad) PCI: Put pci_dev in device tree as early as possible

Any ideas how these are causing the USB HCD core / hid-logitech-dj
driver to drop interrupts?

Regards,
Peter Hurley



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