[LEDE-DEV] octeontx: ieee80211_tx_status: headroom too small

[Enrique Rodríguez Valencia]

I've detected that this error only happens when using 4.14 kernel and an 
ath10k radio that is part of a bridge.

If the wireless interface is not part of a bridge, it works correctly 
and no errors are shown.

Maybe this is a kernel related issue?


El 04/04/18 a las 15:39, Enrique Rodríguez Valencia escribió:
> Hi all,
>
> I'm getting problems when using monitor mode on an ath10k radio in a 
> octeontx board.
>
> Latest LEDE on Gateworks Newport GW6300 (octeontx) with Compex 
> WLE900VX ath10k radio. Using 4.14.13 mainline OpenWrt kernel
>
> The syslog is getting spammed with “ieee80211_tx_status: headroom too 
> small” errors when exists a wireless interface using monitor mode and 
> a station gets connected:
>
> Thu Jan  1 00:52:00 1970 kern.err kernel: [  157.740108] 
> ieee80211_tx_status: headroom too small
> Thu Jan  1 00:52:01 1970 kern.err kernel: [  158.764099] 
> ieee80211_tx_status: headroom too small
> Thu Jan  1 00:52:02 1970 kern.err kernel: [  159.788129] 
> ieee80211_tx_status: headroom too small
>
> These errors are shown using ath10k and ath10k-ct driver versions 
> (currently using ath10k-ct)
>
> Steps to reproduce:
>
> 1) Create a new monitor wireless interface
>
> iw phy phy0 interface add mon0 type monitor
> ip l set dev mon0 up
>
> 2) Connect a client to the access point configured radio
>
> Thanks,
> Enrique Rodriguez
>
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