On Sun, Aug 17, 2008 at 4:59 AM, Mirco Tischler [off-list ref] wrote:

On Fri, 15 Aug 2008 23:50:10 +0300, Leonid Podolny wrote:

quoted

Hi,
With a new iwlagn driver and 2.6.27-rc3, if I turn off the wireless
(intel 4965ag) by RF kill switch, the CPU utilization of ksoftirqd
process raises to 100% and stays there until I rmmod the module.
Please let me know what further information I can provide.

Hi

Same on my machine with same chip and same kernel.
If I use the switch on the side of my laptop to turn off wlan, ksoftirqd eats
up one core of my cpu til I switch it on again or rmmod the iwlagn module. But
when I switch it on before the device loses connection and then off a second
time, I now get a (the) second ksoftirqd process eating up the other core too.
This only happens if a connection is established, though.
I'm not sure if this problem existed in 2.6.26 but I doubt it. (Will check if I
find the time).

My dmesg shows me this:

[48067.257539] iwlagn: Radio Frequency Kill Switch is On:
[48067.257539] Kill switch must be turned off for wireless networking to work.
[48071.295154] wlan0: No ProbeResp from current AP 00:c0:a8:e5:e5:a5 - assume
out of range
[48072.099173] iwlagn: Error sending REPLY_ADD_STA: enqueue_hcmd failed: -5
[48072.099260] mac80211-phy1: failed to remove key (0, 00:c0:a8:e5:e5:a5) from
hardware (-5)
[48072.206028] iwlagn: Error sending REPLY_ADD_STA: enqueue_hcmd failed: -5
[48072.206028] mac80211-phy1: failed to remove key (1, ff:ff:ff:ff:ff:ff) from
hardware (-5)

The probably interesting parts of my config look like that:

CONFIG_IWLWIFI=m
CONFIG_IWLCORE=m
CONFIG_IWLWIFI_LEDS=y
CONFIG_IWLWIFI_RFKILL=y
# CONFIG_IWLWIFI_DEBUG is not set
CONFIG_IWLAGN=m
CONFIG_IWLAGN_SPECTRUM_MEASUREMENT=y
CONFIG_IWLAGN_LEDS=y
CONFIG_IWL4965=y
# CONFIG_IWL5000 is not set
# CONFIG_IWL3945 is not set

CONFIG_RFKILL=m
# CONFIG_RFKILL_INPUT is not set
CONFIG_RFKILL_LEDS=y
CONFIG_IWLWIFI_RFKILL=y

I can recompile with debug options set if this helps. Just haven't found the
time.

There is gap in current rfkill implementation that we didn't close
yet.  There were also few patches that were not signed by Intel and
are apparently wrong.
Tomas.

Thanks
Mirco

P.S.: added some cc's for iwlwifi and rfkill.