linux-kernel - Re: Problem: irq 217: nobody cared + backtrace

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Date:	Fri, 4 Aug 2006 16:36:33 +0200
From:	"Jesper Juhl" <jesper.juhl@...il.com>
To:	"Alan Stern" <stern@...land.harvard.edu>
Cc:	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	linux-usb-devel@...ts.sourceforge.net,
	"Greg Kroah-Hartman" <gregkh@...e.de>
Subject: Re: Problem: irq 217: nobody cared + backtrace

On 03/08/06, Alan Stern <stern@...land.harvard.edu> wrote:
>
> Has this happened more than once?

Seems to happen consistently after ~100000 interrupts.

>  In case it happens again, here's how
> you can get more information.  Turn on CONFIG_USB_DEBUG and
> CONFIG_DEBUG_FS, and mount a debugfs filesystem somewhere (say
> /sys/kernel/debug).  Then after the problem occurs, save a copy of
>
>         /sys/kernel/debug/uhci/0000:00:1d.1
>

# cat /sys/kernel/debug/uhci/0000:00:1d.1
Root-hub state: auto-stopped   FSBR: 0
HC status
  usbcmd    =     0048   Maxp32 CF EGSM
  usbstat   =     0020   HCHalted
  usbint    =     0002
  usbfrnum  =   (1)160
  flbaseadd = 37428160
  sof       =       40
  stat1     =     0080
  stat2     =     0080
Most recent frame: 458 (88)   Last ISO frame: 458 (88)


> That will indicate whether the UHCI controller thinks it is sending an
> interrupt request.
>

And just for completenes, here's the backtrace I got just before
saving the above info :

irq 217: nobody cared (try booting with the "irqpoll" option)
 [<c0103a3c>] show_trace_log_lvl+0x152/0x165
 [<c0103a5e>] show_trace+0xf/0x13
 [<c0103b59>] dump_stack+0x15/0x19
 [<c013846e>] __report_bad_irq+0x24/0x7f
 [<c0138552>] note_interrupt+0x6b/0xd5
 [<c0137ca8>] __do_IRQ+0xf4/0x100
 [<c01050a1>] do_IRQ+0x95/0xbc
 [<c0103502>] common_interrupt+0x1a/0x20
 [<c0137b7e>] handle_IRQ_event+0x20/0x56
 [<c0137c4c>] __do_IRQ+0x98/0x100
 [<c01050a1>] do_IRQ+0x95/0xbc
 [<c0103502>] common_interrupt+0x1a/0x20
 [<c0100e64>] mwait_idle+0x30/0x35
 [<c0100d45>] cpu_idle+0x78/0x81
 [<c04cc7fb>] start_kernel+0x173/0x19d
 [<c0100210>] 0xc0100210
DWARF2 unwinder stuck at 0xc0100210
Leftover inexact backtrace:
 =======================
handlers:
[<c02c5c22>] (usb_hcd_irq+0x0/0x53)
Disabling IRQ #217


-- 
Jesper Juhl <jesper.juhl@...il.com>
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