kern/158156: bce driver shows "no carrier" on IBM blade (HS22 with BCM5709)

[Jason Chang]

>Number:         158156
>Category:       kern
>Synopsis:       bce driver shows "no carrier" on IBM blade (HS22 with BCM5709)
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jun 22 07:50:10 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Jason Chang
>Release:        8.2-STABLE
>Organization:
National Taiwan University
>Environment:
FreeBSD 8.2-STABLE Jun 20 amd64
>Description:
My server is an IBM blade system. The model of server is HS22, network device relate info:
bce0: <Broadcom NetXtreme II BCM5709 1000Base-SX (C0)> mem 0xfa000000-0xfbffffff irq 30 at device 0.0 on pci16
miibus0: <MII bus> on bce0
brgphy0: <BCM5709S 1000/2500baseSX PHY> PHY 2 on miibus0
brgphy0:  1000baseSX-FDX, auto
The network switch is built-in in blade and model is BNT Layer 2-7 GbE Switch. In fact, it is a nortel alteon Layer 7 switch.

After making world/kernel to the latest 8.2-STABLE source, the network device no longer works. Command ifconfig always shows "no carrier". 

>How-To-Repeat:
Update kernel source to 2011/05/22 and after.
/stable/8/sys/dev/mii/mii_physubr.c
(Revision 222159)

>Fix:
revert
/stable/8/sys/dev/mii/mii_physubr.c
from Revision 222159 to Revision 217674


>Release-Note:
>Audit-Trail:
>Unformatted: