usb/121168: Kernel panic when try to unmount removed usbdrive

[Rashid N. Achilov]

On Thursday 28 February 2008, Octavian wrote:
> 
> >How-To-Repeat:
> mount_msdosfs /dev/da0s1 /mnt/usbdrive/
> cd /mnt/usbdrive
> ---(remove usbdrive from port)
> umount -f /mnt/usbdrive
> 
> kernel panic...

O, God! Kernel panic when extracted MSDOS device without unmounting them exist 
in FreeBSD till 2.2.5 version *ROFL* That ancient days, when you mount floppy 
and extract without unmounting, kernel panics... This days flopies were dead. 
But their place now occupied by USB Flash drives, which you can easily 
extract without unmounting. And "I'll back" :-) - when you extract mounted 
flashdrive, kernel panics again... 

For me, USB subsystem in FreeBSD works terrible. Inserting USB Flashdrive can 
hang up or reboot system, inserting digital camera can freeze system until 
USB cord will extracted, boot with inserted USB Flash dumps BTX "registers 
over", USB wireless mices, bought with wireless keyboards, does not works... 
It's too sad...
-- 
   With Best Regards.
   Rashid N. Achilov (RNA1-RIPE), Web: http://www.askd.ru/~shelton
   OOO "ACK" telecommunications administrator, e-mail: achilov-rn [at] askd.ru
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