amd64/184311: kernel panic with bge(4) on SunFire X2100

[Benjamin Stier]

>Number:         184311
>Category:       amd64
>Synopsis:       kernel panic with bge(4) on SunFire X2100
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Nov 26 16:10:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator:     Benjamin Stier
>Release:        9.2-RELEASE-p1
>Organization:
UB Tuebingen
>Environment:
FreeBSD  9.2-RELEASE-p1 FreeBSD 9.2-RELEASE-p1 #0: Mon Nov 25 12:19:51 CET 2013     root@***:/usr/obj/usr/src/sys/UBT  amd64
>Description:
I'm tried updating a SunFire X2100 from 9.1-RELEASE to 9.2-RELEASE-p1 on a SunFire X2100. The machine was running without problems on 9.1-RELEASE.
After updating, the system won't boot and panics with the following message:

--- SNIP ---
bge0: <Broadcom NetXtreme Gigabit Ethernet Controller, ASIC rev. 0x004101> mem 0xfdaf0000-0xfdafffff irq 19 at device 0.0 on pci4
bge0: CHIP ID 0x00004101; ASIC REV 0x04; CHIP REV 0x41; PCI-E
miibus1: <MII bus> on bge0
brgphy0: <BCM5750 1000BASE-T media interface> PHY 1 on miibus1
brgphy0:  no media present
ifmedia_set: no match for 0x0/0xfffffff
panic: ifmedia_set
cpuid = 0
KDB: stack backtrace:
#0 0xffffffff80834966 at kdb_backtrace+0x66
#1 0xffffffff807fcb5e at panic+0x1ce
#2 0xffffffff808be5a3 at ifmedia_set+0x53
#3 0xffffffff8051e58d at brgphy_attach+0x18d
#4 0xffffffff8082d70c at device_attach+0xcc
#5 0xffffffff8082ec8a at bus_generic_attach+0x1a
#6 0xffffffff80525b88 at miibus_attach+0xe8
#7 0xffffffff8082d70c at device_attach+0xcc
#8 0xffffffff8082ec8a at bus_generic_attach+0x1a
#9 0xffffffff8052625f at mii_attach+0x52f
#10 0xffffffff803e03f1 at bge_attach+0x3cf1
#11 0xffffffff8082d70c at device_attach+0xcc
#12 0xffffffff8082ec8a at bus_generic_attach+0x1a
#13 0xffffffff803320a4 at acpi_pci_attach+0x164
#14 0xffffffff8082d70c at device_attach+0xcc
#15 0xffffffff8082ec8a at bus_generic_attach+0x1a
#16 0xffffffff80333eda at acpi_pcib_attach+0x19a
#17 0xffffffff803350db at acpi_pcib_pci_attach+0x9b
--- SNIP ---

I can provide further information if needed.
>How-To-Repeat:

>Fix:
Disabling "hw.bge.allow_asf" on the loader prompt makes the machine boot. However it was working fine without this setting before, so this is not a real fix. 

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