Date: Mon, 20 Feb 2006 05:04:01 GMT From: Chris Elsworth <chris@shagged.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/93586: /src/sys/dev/em/if_em.c 1.112 breaks interfaces Message-ID: <200602200504.k1K541Mu070502@www.freebsd.org> Resent-Message-ID: <200602200510.k1K5A3Wg061823@freefall.freebsd.org>
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>Number: 93586
>Category: kern
>Synopsis: /src/sys/dev/em/if_em.c 1.112 breaks interfaces
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Feb 20 05:10:02 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Chris Elsworth
>Release: 7.0-CURRENT
>Organization:
>Environment:
FreeBSD netboot0.newzbin.com 7.0-CURRENT FreeBSD 7.0-CURRENT #6: Mon Feb 20 04:34:03 UTC 2006 root@netboot0.newzbin.com:/usr/obj/usr/src/sys/X4100_BOOTSRV amd64
>Description:
Upon supping to HEAD tonight, I found that my if_em's in the
Sun Fire x4100 I was fiddling on no longer brought up the link after
they were assigned an IP:
# ifconfig em1 && ifconfig em1 192.168.201.112 && sleep 5 && ifconfig em1
em1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
options=8b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWCSUM>
ether 00:14:4f:20:4f:2d
media: Ethernet autoselect (1000baseTX <full-duplex>)
status: active
em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=8b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWCSUM>
inet 192.168.201.112 netmask 0xffffff00 broadcast 192.168.201.255
ether 00:14:4f:20:4f:2d
media: Ethernet autoselect
status: no carrier
I realise there may be a nominal delay until the carrier comes back,
but it never does.
After some experimentation, I discovered that revision 1.112 is responsible
for this. If I check out 1.111 and build it as a module, the system is fine.
# kldunload if_em
# kldload if_em_1.111.ko
.
em1: <Intel(R) PRO/1000 Network Connection Version - 3.2.18> port 0x9800-0x983f mem 0xfbfc0000-0xfbfdffff irq 27 at device 1.1 on pci1
em1: Ethernet address: 00:14:4f:20:4f:2d
em1: [FAST]
# ifconfig em1 && ifconfig em1 192.168.201.112 && sleep 5 && ifconfig em1
em1: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500
options=8b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWCSUM>
ether 00:14:4f:20:4f:2d
media: Ethernet autoselect (1000baseTX <full-duplex>)
status: active
em1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=8b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWCSUM>
inet 192.168.201.112 netmask 0xffffff00 broadcast 192.168.201.255
ether 00:14:4f:20:4f:2d
media: Ethernet autoselect (1000baseTX <full-duplex>)
status: active
>How-To-Repeat:
Use revision 1.112 of if_em.c
>Fix:
Maybe that hardware initialisation was required after all?
>Release-Note:
>Audit-Trail:
>Unformatted:
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