usb/106648: USB Floppy on D1950 10 min Hang on Insert w/o Floppy Disk

>Number:         106648
>Category:       usb
>Synopsis:       USB Floppy on D1950 10 min Hang on
Insert w/o Floppy Disk
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-usb
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Dec 12 22:00:22 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator:     Sam
>Release:        RELENG_6 from 2006-11-18
>Organization:
Lumeta Corporation
>Environment:
FreeBSD dual-061211-125111 6.2-LUMETA FreeBSD 6.2-LUMETA #0:
Tue Nov 21 01:17:27 
UTC 2006     rootmothra.corp.lumeta.com:/usr/obj/usr/src/sys/LUMETA 
i386
>Description:
When a USB Floppy drive is plugged into a Dell D1950 with no
disk in the drive, the system hangs during boot for 10
minutes or so until it times out.

If the drive is plugged into the system with no disk a
similar timeout behavior is observable during which if you
unplug the device a panic freezes the USB bus. The system
must be restarted manually to recover.

Following are some relevant portions of the system log from
a boot:

Dec 12 14:36:43 dual-061211-125111 kernel: da1 at umass-sim0
bus 0 target 0 lun 0
Dec 12 14:36:43 dual-061211-125111 kernel: da1: <NEC USB
UF000x 1.50> Removable Direct Access SCSI-0 device 
Dec 12 14:36:43 dual-061211-125111 kernel: da1: 1.000MB/s
transfers
Dec 12 14:36:43 dual-061211-125111 kernel: da1: 1MB (2880
512 byte sectors: 64H 32S/T 1C)
Dec 12 14:36:44 dual-061211-125111 kernel: umass0:
Unsupported UFI command 0x35
Dec 12 14:36:44 dual-061211-125111 kernel:
(da1:umass-sim0:0:0:0): Synchronize cache failed, status ==
0x6, scsi status == 0x0
Dec 12 14:36:44 dual-061211-125111 kernel: umass0:
Unsupported UFI command 0x35
Dec 12 14:36:44 dual-061211-125111 kernel:
(da1:umass-sim0:0:0:0): Synchronize cache failed, status ==
0x6, scsi status == 0x0
Dec 12 14:36:44 dual-061211-125111 kernel: umass0:
Unsupported UFI command 0x35
Dec 12 14:36:44 dual-061211-125111 kernel:
(da1:umass-sim0:0:0:0): Synchronize cache failed, status ==
0x6, scsi status == 0x0
Dec 12 14:36:52 dual-061211-125111 kernel: umass0:
Unsupported UFI command 0x35
Dec 12 14:36:52 dual-061211-125111 kernel:
(da1:umass-sim0:0:0:0): Synchronize cache failed, status ==
0x6, scsi status == 0x0
Dec 12 14:37:00 dual-061211-125111 kernel: umass0: at uhub4
port 1 (addr 3) disconnected
Dec 12 14:37:00 dual-061211-125111 kernel:
(da1:umass-sim0:0:0:0): lost device
Dec 12 14:37:00 dual-061211-125111 kernel:
(da1:umass-sim0:0:0:0): removing device entry
Dec 12 14:37:00 dual-061211-125111 kernel: umass0: detached
Dec 12 14:37:15 dual-061211-125111 kernel: umass0: NEC NEC
USB UF000x, rev 1.10/1.50, addr 3
Dec 12 14:37:16 dual-061211-125111 kernel:
(probe0:umass-sim0:0:0:0): INQUIRY. CDB: 12 0 0 0 24 0 
Dec 12 14:37:16 dual-061211-125111 kernel:
(probe0:umass-sim0:0:0:0): CAM Status: SCSI Status Error
Dec 12 14:37:16 dual-061211-125111 kernel:
(probe0:umass-sim0:0:0:0): SCSI Status: Check Condition
Dec 12 14:37:16 dual-061211-125111 kernel:
(probe0:umass-sim0:0:0:0): UNIT ATTENTION asc:29,0
Dec 12 14:37:16 dual-061211-125111 kernel:
(probe0:umass-sim0:0:0:0): Power on, reset, or bus device
reset occurred
Dec 12 14:37:16 dual-061211-125111 kernel:
(probe0:umass-sim0:0:0:0): Retrying Command (per Sense Data)
Dec 12 14:38:07 dual-061211-125111 kernel:
(da1:umass-sim0:0:0:0): got CAM status 0x4
Dec 12 14:38:07 dual-061211-125111 kernel:
(da1:umass-sim0:0:0:0): fatal error, failed to attach to
device
Dec 12 14:38:07 dual-061211-125111 kernel:
(da1:umass-sim0:0:0:0): lost device
Dec 12 14:43:32 dual-061211-125111 kernel:
(da1:umass-sim0:0:0:0): removing device entry
Dec 12 14:43:32 dual-061211-125111 kernel: Opened disk da1
-> 5

>How-To-Repeat:
On a Dell D1950 plug in a USB floppy with no disk in it and
boot the system. It will hang when trying to read it.

Alternately, plug the floppy with no disk in it and then
remove it. The USB bus becomes unusable.
>Fix:

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