ATH10K set bitrates problem

[Frank Agius]

I am unable to set the bitrates for devices using the ath10k driver, 
regardless of the arguments I pass:


# iw wlan0 set bitrates legacy-2.4 6 12 24
command failed: Invalid argument (-22)
# iw dev wlan0 set bitrates mcs-2.4 10
command failed: Invalid argument (-22)


The ath10k drivers were built from stable backports v3.15-rc1.   I am 
using firmware file firmware-2.bin_999.999.0.636


Is this a known issue?


frank agius