[ath9k-devel] tx99 memory allocate failure

Hi Eduardo,

I'm using this:
#!/bin/bash
mount -t debugfs nodev /sys/kernel/debug

echo "Prep for tx99"
iw phy phy0 interface add moni0 type monitor
ip link set dev moni0 up

echo "Activating tx99"
echo 15 > /sys/kernel/debug/ieee80211/phy0/ath9k/tx99_power
echo 1 > /sys/kernel/debug/ieee80211/phy0/ath9k/tx99

Is that not enough?
Ifconfig lists moni0 as follows:
moni0     Link encap:UNSPEC  HWaddr
BC-30-7E-BC-59-98-35-65-00-00-00-00-00-00-00-00
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B

Kr

On Tue, May 17, 2016 at 4:07 PM, Eduardo Abinader <
[email protected]> wrote:

> Hi,
>
> Create the monitor interface with active flag set.
>
> BR.
> ------------------------------
> *From:* ath9k-devel-bounces at lists.ath9k.org [
> ath9k-devel-bounces at lists.ath9k.org] on behalf of Mathieu Slabbinck [
> matty.slabbinck at gmail.com]
> *Sent:* Tuesday, May 17, 2016 3:52 PM
> *To:* ath9k-devel at lists.ath9k.org
> *Subject:* [ath9k-devel] tx99 memory allocate failure
>
> Hi,
>
> I'm having some issues running the tx99 features of the ath9k driver.
> Seems like every time I try to run it, I get this:
> sh: write error: cannot allocate memory.
>
> After some poking, I found it's returning -ENOMEN in tx99.c.
> Which is due to !sc-tx99_skb
> Which on it's turn is due to an empty value for sc->tx99_vif.
>
> So essentially, it's going wrong in ath9k_build_tx99_skb and returns NULL
> when checking:
> if (!sc->tx99_vif) {
>     return NULL;
> }
>
> Anybody some ideas on what the actual root cause can be of this and/or how
> to solve it?
>
> Kernel version: 4.1.0
>
> Thanks & Kr
>
> Mathieu
>
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