Like others, I'm having problems with mwifiex_usb on a Surface 2 Pro,
with the latest firmware "driver_version = mwifiex 1.0 (14.68.29.p38)"
and the latest release candidate kernel (4.3.0rc7)
Every 5-10 seconds, even while idle, I'll get a kernel message:
usb 1-2: Rx of mgmt packet failed
Under load (a big scp or a couple of kernel source tarballs will do
the trick), I get a huge amount of log spam, one message per packet:
usb 1-2: data: -ENOSR is returned
Occasionally I'll also see
usb 1-2: mwifiex_usb_submit_rx_urb: dev_alloc_skb failed
After a while, I get the dreaded firmware bad state and the only fix
is to power cycle the machine. Suspend doesn't reset the hardware, and
attempting to rmmod/modprobe mwifiex_usb will crash my machine.
usb 1-2: mwifiex_cmd_timeout_func: Timeout cmd id = 0x6, act = 0x3
usb 1-2: num_data_h2c_failure = 0
usb 1-2: num_cmd_h2c_failure = 0
usb 1-2: is_cmd_timedout = 1
usb 1-2: num_tx_timeout = 0
usb 1-2: last_cmd_index = 0
usb 1-2: last_cmd_id: 06 00 28 00 28 00 28 00 28 00
usb 1-2: last_cmd_act: 03 00 13 00 13 00 13 00 13 00
usb 1-2: last_cmd_resp_index = 4
usb 1-2: last_cmd_resp_id: 28 80 28 80 28 80 28 80 28 80
usb 1-2: last_event_index = 3
usb 1-2: last_event: 37 00 33 00 37 00 33 00 33 00
usb 1-2: data_sent=0 cmd_sent=0
usb 1-2: ps_mode=0 ps_state=0
usb 1-2: Ignore scan. Card removed or firmware in bad state
usb 1-2: scan failed: -14
usb 1-2: Ignore scan. Card removed or firmware in bad state
usb 1-2: scan failed: -14
usb 1-2: Ignore scan. Card removed or firmware in bad state
usb 1-2: scan failed: -14
usb 1-2: Ignore scan. Card removed or firmware in bad state
usb 1-2: scan failed: -14
usb 1-2: Ignore scan. Card removed or firmware in bad state
usb 1-2: scan failed: -14
usb 1-2: Ignore scan. Card removed or firmware in bad state
usb 1-2: scan failed: -14
usb 1-2: Ignore scan. Card removed or firmware in bad state
usb 1-2: scan failed: -14
usb 1-2: PREP_CMD: FW is in bad state
usb 1-2: PREP_CMD: FW is in bad state
IPv6: ADDRCONF(NETDEV_UP): wlx281878fd2432: link is not ready
usb 1-2: PREP_CMD: FW is in bad state
This is reproducible all the way up to 4.3.0-rc7 which includes the patch from
http://www.spinics.net/lists/netdev/msg334367.html
that was suggested as a fix in
http://www.spinics.net/lists/linux-wireless/msg139095.html
I was able to reproduce this with after turning up debugging (echo
0xffffffff > /sys/kernel/debug/mwifiex/mlan0/debug_mask) - the
resulting trace is 1.4GB. Interested parties can contact me for a
link, or tell me what I should grep for...
--
GDB has a 'break' feature; why doesn't it have 'fix' too?
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