Change for the worse in rsu wireless driver

[Thomas Mueller]

WLAN device is Hiro H50191 USB wireless adapter, chipset RTL8191SU.

I just updated FreeBSD-current, both amd64 and i386, now both rsu and Xorg are highly unstable, at least on amd64.

FreeBSD amelia4 11.0-CURRENT FreeBSD 11.0-CURRENT #6 r266948: Sun Jun  1 19:12:44 UTC 2014     root at amelia4:/usr/obj/usr/src/sys/SANDY11NC  amd64

root at amelia4:~ # ls -l /usr/src/sys/dev/usb/wlan                                

total 1164                                                                      

-rw-r--r--  1 root  wheel   65759 Jun  1 16:23 if_rsu.c                         

-rw-r--r--  1 root  wheel   19964 Jun  1 16:23 if_rsureg.h                      

(snip)

This is a change for the worse.  Now I can connect with Hiro H50191; bug in re Ethernet driver persists, so I can't connect that way.

I also had several crashes in Xorg, so am typing this with vi in newcons.

Tom