Re: Wireless usb + wep = no usbd_do_request

On 11/3/09, PseudoCylon <moonlightakkiy_at_yahoo.ca> wrote:
> Hi,
>
> I'm porting a wireless usb driver (if_run) to freebsd current, and I got
> stuck. Once I "ifconfig wlan0 wepkey 1:0x... weptxkey 1" I cannot call
> usbd_do_request() any more. Even ifconfig didn't exit. Chipset supports h/w
> en/decryption, so cannot write keys on chip. (It works without encryption,
> by the way.)
>
> So, I tried the same thing on another device, linksys wusb54gc with if_rum.
> It worked fine, but about 3 to 4 min later. (Just left it alone.) It started
> giving error
> rum0: could not multi read MAC register: USB_ERR_TIMEOUT and
> rum0: device timeout
> when ifconfig wlan0 down,
> rum0: could not multi write MAC register: USB_ERR_TIMEOUT
> which means failed on usbd_do_request() (This could be totally different
> issue.)

I get this one multiple times after card got detached but vap was not
manually destroyed.
Recently I did not used if_rum more that 5 min I think(maybe in AP
mode when I was testing hidden ssid ...)

> Any ideas, patches, or walkaround?

Make sure how locks are handled between net80211, usb and driver itself.

> More info
> #uname -a
> FreeBSD  9.0-CURRENT FreeBSD 9.0-CURRENT #1 r198150M: Fri Oct 16 22:44:08
> UTC 2009 amd64
>
> ddb trace output 20+ minutes after "ifconfig wepkey" (using if_run)
> Tracing command ifconfig pid 1586 tid 100159 td 0xffffff000b3d3a80
> sched_switch() at sched_switch+0x180
> mi_switch() at mi_switch+0x21d
> sleepq_switch() at sleepq_switch+0x123
> sleepq_wait() at sleepq_wait+0x4d
> _sleep() at _sleep+0x357
> taskqueue_drain() at taskqueue_drain+0xc2
> ieee80211_waitfor_parent() at ieee80211_waitfor_parent+0x3e
> ieee80211_ioctl() at ieee80211_ioctl+0x162
> ifioctl() at ifioctl+0xde4
> kern_ioctl() at kern_ioctl+0xc5
> ioctl() at ioctl+0xfd
> syscall() at syscall+0x1af
> Xfast_syscall() at Xfast_syscall+0xe1
>
> Also, sleep mutex became spin mutex. I get a panic
> panic: mtx_lock of spin mutex(null)
> It works fine before ifconfig wepkey.

It is hard to tell without code example but wepkey works fine with
if_rum last time I tried, note that if_rum have done encryption in
software mode.