kern/50038: udl (DisplayLink GX-DVI_U2B) alignment fault on earmv6hf NETWALKER

[mochid%netside.co.jp@localhost]

>Number:         50038
>Category:       kern
>Synopsis:       udl (DisplayLink GX-DVI_U2B) alignment fault on earmv6hf NETWALKER
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jul 07 16:30:00 +0000 2015
>Originator:     MOCHIDA Shuji
>Release:        NetBSD 7.99.19 update at 2015 July 5
>Organization:
NETside
>Environment:
evbarm earmv6hf NETWALKER Cortex-A8
>Description:
    no serial console, so type by hand (may with some typos..)

udl0 at uhub2 port 1
udl0: DisplayLink GX-DVI_U2B, rev 2.00/1.06, addr 3
Fatal kernel mode data abort:'Alignment Fault 1'
trapframe: 0x9fdc7b30
FSR=00000001, FAR=ca6c0002, spsr=800d0013
r0 =00000000, r1 =00000000, r2 =00000000, r3 =ca6c0002
r4 =9b64d000, r5 =00000000, r6 =00000000, r7 =000069af
r8 =0000fff5, r9 =00000100, r10=0004b000, r11=9fdc7bcc
r12=00000000, ssp=9fdc7b00, slr=003bf22f, pc =003bdbd0

Stopped inpid 0.36 (system) at netbsd:udl_fill_rect+0xc0:    str    r0, [r3]

db> bt
0x9fdc7bcc: netbsd:udl_fill_rect+0xc
0x9fdc7da4: netbsd:udl_attach+0xdac
0x9fdc7dd4: netbsd:config_attach_loc+0x1a4
0x9fdc7e4c: netbsd:usbd_attachwholedevice+0xb4
0x9fdc7e7c: netbsd:usbd_probe_and_attach+0x24
0x9fdc7ecc: netbsd:usbd_new_device+0x2d0
0x9fdc7f1c: netbsd:uhub_explore+0x2d0
0x9fdc7f6c: netbsd:uhub_explore+0x88
0x9fdc7f8c: netbsd:usb_discover.isra.0+0x54
0x9fdc7fac: netbsd:usb_event_thread+0x88
db> 

>How-To-Repeat:
	plug Buffalo GX-DVI/U2B to NETWALKER's USB port.
>Fix:
	please.