kern/40981: wm0: device timeout

[Thomas Klausner <wiz%NetBSD.org@localhost>]

>Number:         40981
>Category:       kern
>Synopsis:       wm0: device timeout
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Mar 08 12:00:00 +0000 2009
>Originator:     Thomas Klausner
>Release:        NetBSD 5.0/20090227
>Organization:
Curiosity is the very basis of education and if you tell me that 
curiosity killed the cat, I say only that the cat died nobly.
- Arnold Edinborough
>Environment:
        
        
Architecture: x86_64
Machine: amd64
>Description:
On a lenovo T61 without any Ethernet cable plugged in, wm0 reports device
timeouts approximately every 30 minutes.

dmesg | grep wm0:
wm0 at pci0 dev 25 function 0: Intel i82801H (M_AMT) LAN Controller, rev. 3
wm0: interrupting at ioapic0 pin 20
wm0: PCI-Express bus
wm0: FLASH
wm0: Ethernet address 00:1f:e2:14:b6:41
igphy0 at wm0 phy 1: i82566 10/100/1000 media interface, rev. 0
wm0: device timeout (txfree 4095 txsfree 63 txnext 52)

The messages from today were at 7:32, 7:57, 8:29, 9:07, 9:35, 10:13,
10:42, 11:15, 11:47, 12:17, 12:52, 13:24.

This also happens when a cable is plugged in, general network connectivity
seems to work fine nevertheless.
>How-To-Repeat:
        
>Fix:
        

>Unformatted: