kern/60602: Dynamic attach UBS device can cause 5.2-RC system malfunction

[Jin Guojun[VFF]]

>Number:         60602
>Category:       kern
>Synopsis:       Dynamic attach UBS device can cause 5.2-RC system malfunction
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Dec 26 21:10:07 PST 2003
>Closed-Date:
>Last-Modified:
>Originator:     Jin Guojun[VFF]
>Release:        FreeBSD 5.2-RC
>Organization:
>Environment:
System: FreeBSD 5.2-RC


	FreeBSD 5.2-RC2
        root at wv1u.btc.adaptec.com:/usr/obj/usr/src/sys/GENERIC
    Preloaded elf kernel "/boot/kernel/kernel" at 0xc0a2c000.
    Preloaded elf module "/boot/kernel/acpi.ko" at 0xc0a2c21c.
    Timecounter "i8254" frequency 1193182 Hz quality 0
    CPU: Pentium III/Pentium III Xeon/Celeron (463.55-MHz 686-class CPU)
      Origin = "GenuineIntel"  Id = 0x673  Stepping = 3
      Features=0x383fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE>
    real memory  = 536858624 (511 MB)
    avail memory = 511819776 (488 MB)
    MPTable: <OEM00000 PROD00000000>
    FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
     cpu0 (BSP): APIC ID:  1
     cpu1 (AP): APIC ID:  0
    ioapic0: Assuming intbase of 0
    ioapic0 <Version 1.1> irqs 0-23 on motherboard
    Pentium Pro MTRR support enabled
    npx0: [FAST]

>Description:
	Dynamicallt attaching Sony DRX-510UL USB CD-RW drive to 5.2-RC system
	can cause system malfunction:

	Attach DRX-510UL USB CD-RW drive to system USB port:
	(1) power the drive on and reboot system --
		run command -- cdrecord -scanbus
			it shows that the drive is at SCSI 0,0,0
		run command -- cdrecord -v dev=0,0,0 image.iso

		everything is Okey.

	(2) power off the drive on and reboot system --
		After system is up, then power on the USB CD-RW drive
		and run command -- cdrecord -scanbus
			it shows that the drive is at SCSI 1,0,0
		run command -- cdrecord -v dev=1,0,0 image.iso

		# ls
		bus error
		# halt
		bus error
		# shutdown -h now
		bus error

		# some command may work


>How-To-Repeat:
	I do not have other USB drive, so I cannot tell if this is DRX-510UL
	specific.
	Hopefully, developer may verify this issue by attaching a differnt
	USB CD-RW drive.

>Fix:

	


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