linux-kernel - Re: [-next-20130204] usb/hcd: irq 18: nobody cared

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Message-ID: <1360324631.3385.9.camel@thor.lan>
Date:	Fri, 08 Feb 2013 06:57:11 -0500
From:	Peter Hurley <peter@...leysoftware.com>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	Lan Tianyu <tianyu.lan@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Kosina <jkosina@...e.cz>, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-next@...r.kernel.org
Subject: Re: [-next-20130204] usb/hcd:  irq 18: nobody cared

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
> > ...
> > 
> > Didn't have this problem with -next-20120125. One of these commits, maybe?
> > next/drivers/usb/core$ git log --oneline next-20130125..next-20130204 -- *
> > 2c2e865 usb: forbid memory allocation with I/O during bus reset
> > e9121a8 Merge remote-tracking branch 'usb/usb-next'
> > 3b2ab2b Revert "usb: Register usb port's acpi power resources"
> > da0aa71 USB: add usb_hcd_{start,end}_port_resume
> > 192fef1 usb: enable usb port device's async suspend.
> > f6cced1 usb: expose usb port's pm qos flags to user space
> > ad493e5 usb: add usb port auto power off mechanism
> > 971fcd4 usb: add runtime pm support for usb port device
> > 88bb965 usb: Register usb port's acpi power resources
> > 54a3ac0 usb: Using correct way to clear usb3.0 device's remote wakeup feature.
> 
> None of those commits seems likely to have caused the problem.  The 
> most likely is da0aa71, combined with one you didn't mention:
> 
> 840008bb USB: UHCI: notify usbcore about port resumes
> 
> If you revert these two commits, does that make any difference?  What
> if you revert all of these commits?

None of these commits are directly causing this. I tested Greg's usb
master and usb-next and both run fine for me.

> > I didn't see any changes in the drivers/hid/hid-logitech-dj.c or usbhid
> > but maybe it's doing something wrong anyway?
> > 
> > I'll open a bugzilla if a bunch more info is necessary.
> 
> If the suggestion above doesn't work out, bisection may be the best way
> to find the answer.

Any pointers on how to one of) build a linear history for -next, get
bisect to work on an integration tree, or third option I haven't thought
of?

Thanks,
Peter Hurley


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