bin/97478: umount -f /card -> hardware-reset is needed

[Helmut Schellong]

>Number:         97478
>Category:       bin
>Synopsis:       umount -f /card -> hardware-reset is needed
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri May 19 03:30:15 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Helmut Schellong
>Release:        6.1
>Organization:
private
>Environment:
FreeBSD fbsd.lokal.biz 6.1-RELEASE FreeBSD 6.1-RELEASE #0: Sat May 13 08:45:34 CEST 2006
root at fbsd.lokal.biz:/usr/src/sys/i386/compile/BSD61  i386

>Description:
26]  camcontrol devlist
<TEAC CD-W552E 1.14>            at scbus1 target 0 lun 0 (pass0,cd0)
<IOMEGA ZIP 100 14.A>           at scbus1 target 1 lun 0 (pass1,da0)
<Generic STORAGE DEVICE 0119>   at scbus2 target 0 lun 0 (pass2,da2) ***

27]  mount
/dev/ad0s2a on / (ufs, local)
devfs on /dev (devfs, local)
..
linprocfs on /usr/compat/linux/proc (linprocfs, local)
procfs on /proc (procfs, local)
/dev/da1s2 on /card (ufs, local, soft-updates)  ***

28]  umount -f /card
*** System is frozen maximally ***
HW-reset only unlocks.

--- da1 is NOT configured, because the card reader was disconnected!
>How-To-Repeat:
Command sequence see above.
>Fix:
umount knows that the device is not configured.
Why not removes it the mount-entry only or takes then no action?
>Release-Note:
>Audit-Trail:
>Unformatted: