urtwn/RTL8188RU causing reboot

[Waitman Gobble <gobble.wa%gmail.com@localhost>]

Hi,

The machine seems to panic when loading the urtwn driver for a RTL8188RU.

# uname -a
NetBSD rpi 7.99.4 NetBSD 7.99.4 (RPI.201501110220Z) #0: Sun Jan 11
03:45:13 UTC 2015
builds%b48.netbsd.org@localhost:/home/builds/ab/HEAD/evbarm-earmv6hf/201501110220Z-obj/home/source/ab/HEAD/src/sys/arch/evbarm/compile/RPI
evbarm

...
Jan 11 04:22:45 rpi /netbsd: urtwn0 at uhub1 port 5
Jan 11 04:22:45 rpi /netbsd: urtwn0: Realtek 802.11n WLAN Adapter, rev
2.00/2.00, addr 6
Jan 11 04:22:45 rpi /netbsd: urtwn0: MAC/BB RTL8188RU, RF 6052 1T1R,
address 08:10:77:52:9d:dc
Jan 11 04:22:45 rpi /netbsd: urtwn0: 1 rx pipe, 2 tx pipes
Jan 11 04:22:45 rpi /netbsd: urtwn0: 11b rates: 1Mbps 2Mbps 5.5Mbps 11Mbps
Jan 11 04:22:45 rpi /netbsd: urtwn0: 11g rates: 1Mbps 2Mbps 5.5Mbps
11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36Mbps 48Mbps 54Mbps
Jan 11 04:22:45 rpi /netbsd: boot device: ld0
Jan 11 04:22:45 rpi /netbsd: root on ld0a dumps on ld0b
Jan 11 04:22:45 rpi /netbsd: mountroot: trying nfs...
Jan 11 04:22:45 rpi /netbsd: mountroot: trying msdos...
Jan 11 04:22:45 rpi /netbsd: mountroot: trying ext2fs...
Jan 11 04:22:45 rpi /netbsd: mountroot: trying ffs...
Jan 11 04:22:45 rpi /netbsd: root file system type: ffs
Jan 11 04:22:45 rpi /netbsd: kern.module.path=/stand/evbarm/7.99.4/modules
Jan 11 04:22:45 rpi /netbsd: vchiq: local ver 6 (min 3), remote ver 6.
Jan 11 04:22:45 rpi /netbsd: vcaudio0 at vchiq0: auds
Jan 11 04:22:45 rpi /netbsd: WARNING: no TOD clock present
Jan 11 04:22:45 rpi /netbsd: WARNING: using filesystem time
Jan 11 04:22:45 rpi /netbsd: WARNING: CHECK AND RESET THE DATE!
Jan 11 04:22:45 rpi /netbsd: audio0 at vcaudio0: half duplex,
playback, capture, independent
Jan 11 04:22:45 rpi /netbsd: init: copying out path `/sbin/init' 11
Jan 11 04:22:45 rpi /netbsd: sd0: fabricating a geometry
Jan 11 04:22:45 rpi /netbsd: WARNING: module error: vfs load failed
for `com', error 2
Jan 11 04:22:45 rpi /netbsd: WARNING: module error: vfs load failed
for `com', error 2
Jan 11 04:22:45 rpi /netbsd: usmsc0: link state DOWN (was UNKNOWN)
Jan 11 04:22:45 rpi /netbsd: panic: kernel diagnostic assertion
"requested_size > 0" failed: file
"/home/source/ab/HEAD/src/sys/kern/subr_kmem.c", line 324
Jan 11 04:22:45 rpi /netbsd: cpu0: Begin traceback...
Jan 11 04:22:45 rpi /netbsd: 0xdb65390c: netbsd:db_panic+0xc
Jan 11 04:22:45 rpi /netbsd: 0xdb65393c: netbsd:vpanic+0x134
Jan 11 04:22:45 rpi /netbsd: 0xdb653954: netbsd:kern_assert+0x40
Jan 11 04:22:45 rpi /netbsd: 0xdb653994: netbsd:kmem_intr_free+0x14c
Jan 11 04:22:45 rpi /netbsd: 0xdb653a24: netbsd:urtwn_init+0x984
Jan 11 04:22:45 rpi /netbsd: 0xdb653a4c: netbsd:ether_ioctl+0xcc
Jan 11 04:22:45 rpi /netbsd: 0xdb653af4: netbsd:ieee80211_ioctl+0x6f0
Jan 11 04:22:45 rpi /netbsd: 0xdb653b1c: netbsd:urtwn_ioctl+0x84
Jan 11 04:22:45 rpi /netbsd: 0xdb653b34: netbsd:if_addr_init+0x60
Jan 11 04:22:45 rpi /netbsd: 0xdb653c24: netbsd:in6_update_ifa+0x608
Jan 11 04:22:45 rpi /netbsd: 0xdb653d14: netbsd:in6_control+0x97c
Jan 11 04:22:45 rpi /netbsd: 0xdb653d34: netbsd:compat_ifioctl+0x120
Jan 11 04:22:45 rpi /netbsd: 0xdb653e14: netbsd:doifioctl+0x6bc
Jan 11 04:22:45 rpi /netbsd: 0xdb653e3c: netbsd:soo_ioctl+0x280
Jan 11 04:22:45 rpi /netbsd: 0xdb653f04: netbsd:sys_ioctl+0x25c
Jan 11 04:22:45 rpi /netbsd: 0xdb653f74: netbsd:syscall+0x8c
Jan 11 04:22:45 rpi /netbsd: 0xdb653fac: netbsd:swi_handler+0x9c
Jan 11 04:22:45 rpi /netbsd: cpu0: End traceback...
Jan 11 04:22:45 rpi /netbsd:
Jan 11 04:22:45 rpi /netbsd: dump to dev 92,1 not possible
Jan 11 04:22:45 rpi /netbsd: rebooting...


an RT3071 works great.
run0: Ralink 802.11 n WLAN, rev 2.00/1.01, addr 6
                                                     run0: MAC/BBP
RT3071 (rev 0x021C), RF RT3022 (MIMO 2T2R), address 48:02:2a:70:10:1b

Any help or tips appreciated.

Thank you,

-- 
Waitman Gobble
Los Altos California USA
510-830-7975