usb/83563: Page Fault while detaching Mpman Usb device

[Hanspeter Roth]

>Number:         83563
>Category:       usb
>Synopsis:       Page Fault while detaching Mpman Usb device
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Jul 16 16:10:27 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Hanspeter Roth
>Release:        FreeBSD 6.0-BETA1 i386
>Organization:
>Environment:
System: FreeBSD goofy.here 6.0-BETA1 FreeBSD 6.0-BETA1 #0: Tue Jul 12 18:05:55 UTC 2005 root at x64.samsco.home:/usr/obj/usr/src/sys/GENERIC i386

	HP Pavilion tz3030EA
	MPMan 256MB USB MP3 player
	
>Description:
	I have an MPMan MP3 player with an USB connection. When connected
	to the computer audio files can be copied to the MP3 player.
	When the MP3 player is connected to FreeBSD it takes some seconds
	until the corresponding entries appear in `dmesg`.

	umass0: vendor 0x10d6 Generic USB Disk Device, rev 1.10/1.00, addr 2
	da0 at umass-sim0 bus 0 target 0 lun 0
	da0: <GENERIC USB DISK DEVICE 1.00> Removable Direct Access SCSI-2 device 
	da0: 1.000MB/s transfers
	da0: 249MB (510494 512 byte sectors: 64H 32S/T 249C)

	/dev/da0* entries are not available.
	When the device is detached FreeBSD usually goes into the debugger.

	To connect other USB memory sticks is no problem.
>How-To-Repeat:
	Boot FreeBSD.
	Attach the MPMan MP3 player.
	# ls /dev/da0*
	ls: /dev/da0*: No such file or directory
	Detach the MPMan MP3 player.
>Fix:

	


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