carl9170: Lots of 'device restart'

[Harshal Chhaya <harshal@gmail.com>]

Hello,

Here is the console log from an instance when my carl9170-based AP was
stuck in a bad state. The "Dhcp:" messages are from my user-level
application and are merely informative.

Any ideas on what could have caused so many "device restarts"? The AP
was unusable for ~10 min and fixed itself after that. Is the failed
channel change an indication?



[   57.355377] ieee80211 phy1: channel change: 2437 -> 2437 failed (2).
#### hostapd started
Dhcp: Lease count changed: 17 -> 23
[   74.126281] usb 1-1: restart device (4)
[   75.270019] usb 1-1: device restarted successfully.
[   75.282958] ieee80211 phy1: Hardware restart was requested
[   76.095520] ieee80211 phy1: channel change: 2437 -> 2437 failed (2).
[   83.962158] usb 1-1: restart device (4)
[   85.105957] usb 1-1: device restarted successfully.
[   85.117248] ieee80211 phy1: Hardware restart was requested
[   85.925445] ieee80211 phy1: channel change: 2437 -> 2437 failed (2).
[  101.475524] ieee80211 phy1: invalid plcp cck rate (0).
[  105.235229] ieee80211 phy1: invalid plcp cck rate (0).
[  116.718292] ieee80211 phy1: invalid plcp cck rate (0).
[  123.892150] usb 1-1: restart device (4)
[  125.035339] usb 1-1: device restarted successfully.
[  125.050964] ieee80211 phy1: Hardware restart was requested

Dhcp: Lease count changed: 23 -> 27

Dhcp: Lease count changed: 31 -> 35

[  213.108276] ieee80211 phy1: invalid plcp cck rate (0).
[  236.235626] usb 1-1: restart device (4)
[  237.379180] usb 1-1: device restarted successfully.
[  237.397216] ieee80211 phy1: Hardware restart was requested
[  245.719970] usb 1-1: restart device (4)
[  246.863586] usb 1-1: device restarted successfully.
[  246.882110] ieee80211 phy1: Hardware restart was requested
[  247.692077] ieee80211 phy1: channel change: 2437 -> 2437 failed (2).
[  260.595031] usb 1-1: restart device (4)
[  261.738433] usb 1-1: device restarted successfully.
[  261.752441] ieee80211 phy1: Hardware restart was requested
[  270.933074] ieee80211 phy1: invalid plcp cck rate (0).
[  285.126220] usb 1-1: restart device (4)
[  286.269622] usb 1-1: device restarted successfully.
[  286.295989] ieee80211 phy1: Hardware restart was requested
[  297.403289] ieee80211 phy1: invalid plcp cck rate (0).
[  362.321533] usb 1-1: restart device (4)
[  363.465087] usb 1-1: device restarted successfully.
[  363.478973] ieee80211 phy1: Hardware restart was requested
[  365.365234] ieee80211 phy1: invalid plcp cck rate (0).
[  373.162506] ieee80211 phy1: invalid plcp cck rate (0).
[  379.313629] usb 1-1: restart device (4)
[  380.321624] usb 1-1: kill pending tx urbs.
[  381.465850] usb 1-1: device restarted successfully.
[  381.503601] ieee80211 phy1: Hardware restart was requested
[  402.352691] usb 1-1: restart device (4)
[  403.497619] usb 1-1: device restarted successfully.
[  403.539215] ieee80211 phy1: Hardware restart was requested
[  419.376220] usb 1-1: restart device (4)
[  420.519714] usb 1-1: device restarted successfully.
[  420.541839] ieee80211 phy1: Hardware restart was requested
[  425.160736] ieee80211 phy1: invalid plcp cck rate (0).
[  429.087493] ieee80211 phy1: invalid plcp cck rate (0).
[  443.876251] usb 1-1: restart device (4)
[  445.027557] usb 1-1: device restarted successfully.
[  445.061523] ieee80211 phy1: Hardware restart was requested
[  453.605346] ieee80211 phy1: invalid plcp cck rate (0).
[  460.923065] usb 1-1: restart device (4)
[  462.066619] usb 1-1: device restarted successfully.
[  462.079711] ieee80211 phy1: Hardware restart was requested
[  468.083282] ieee80211 phy1: invalid plcp cck rate (0).
[  476.703277] ieee80211 phy1: invalid plcp cck rate (0).
[  485.423095] usb 1-1: restart device (4)
[  486.566833] usb 1-1: device restarted successfully.
[  486.580322] ieee80211 phy1: Hardware restart was requested
[  494.907440] usb 1-1: restart device (4)
[  496.051025] usb 1-1: device restarted successfully.
[  496.064727] ieee80211 phy1: Hardware restart was requested
[  509.407470] usb 1-1: restart device (4)
[  510.550872] usb 1-1: device restarted successfully.
[  510.563232] ieee80211 phy1: Hardware restart was requested
[  511.534698] ieee80211 phy1: invalid plcp cck rate (0).
[  602.615661] ieee80211 phy1: invalid plcp cck rate (0).
[  616.634002] usb 1-1: restart device (4)
[  617.777526] usb 1-1: device restarted successfully.
[  617.816711] ieee80211 phy1: Hardware restart was requested

Dhcp: Lease count changed: 35 -> 37
Dhcp: Lease count changed: 37 -> 42
Dhcp: Lease count changed: 42 -> 43

[  662.467742] ieee80211 phy1: invalid plcp cck rate (0).

Dhcp: Lease count changed: 43 -> 50
Dhcp: Lease count changed: 50 -> 54



Thanks,
- Harshal