changing channel width

[Phil Moora]

Hi all,

I am trying to change the channel width (20, 40 or 80 MHz) with ath10k
using iw. I am not able to do so dynamically (while the radio is
operating in managed or AP mode). In some cases, it is not possible to
change channel width even when radio is off (ifconfig down). I always
get "Device busy" error.

Is it true that with current Ath10k, we have to reset the radio to
change the channel width? Is there a workaround?

I am using Compex WLE900N5-18 miniPCIe (hw2) with latest ath10k.