kern/79295: umount oddity with NFS (fwe) over VIA Fire II card

[Harald Schmalzbauer]

>Number:         79295
>Category:       kern
>Synopsis:       umount oddity with NFS (fwe) over VIA Fire II card
>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 Mar 28 07:10:01 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Harald Schmalzbauer
>Release:        FreeBSD 5.4-PRERELEASE i386
>Organization:
>Environment:
System: FreeBSD test3.flintsbach.schmalzbauer.de 5.4-PRERELEASE FreeBSD 5.4-PRERELEASE #0: Sun Mar 27 00:14:53 CET 2005 root at test1.flintsbach.schmalzbauer.de:/usr/obj/CUV-LV/usr/src/sys/CUV-LV i386


fwohci0: <VIA Fire II (VT6306)> port 0xa000-0xa07f mem 0xf9000000-0xf90007ff irq 5 at device 10.0 on pci0
fwohci0: OHCI version 1.0 (ROM=1)
fwohci0: No. of Isochronous channels is 4.
fwohci0: EUI64 00:11:06:00:00:00:75:86
fwohci0: Phy 1394a available S400, 3 ports.
fwohci0: Link S400, max_rec 2048 bytes.
firewire0: <IEEE1394(FireWire) bus> on fwohci0
fwe0: <Ethernet over FireWire> on firewire0
if_fwe0: Fake Ethernet address: 02:11:06:00:75:86
fwe0: Ethernet address: 02:11:06:00:75:86
fwe0: if_start running deferred for Giant
sbp0: <SBP-2/SCSI over FireWire> on firewire0
fwohci0: Initiate bus reset
fwohci0: node_id=0xc800ffc1, gen=1, CYCLEMASTER mode
firewire0: 2 nodes, maxhop <= 1, cable IRM = 1 (me)
firewire0: bus manager 1 (me)

>Description:
	`umount` doesn't work with VIA FireWire-card (and fwe), while transferring seems to work now
	(did not with RELENG_5 some months ago)
>How-To-Repeat:
	When I use two TexasInstruments based FW-cards and want to umount a NFS-share it works as
	expected, but when I replace one TI based card with a VIA (Fire II) umount doesn't finish
	on the the client machine.
	Same behaviour with two VIA cards, umount doesn't return to CLI on the client, but when I
	interrupt the command (with Ctrl-C) the NFS-share actually got umounted, I also can remount
	the same share (even with different parameters) without problems!
>Fix:

	


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