Ben Greear [off-list ref] writes:

quoted

Michal already did. The error means that for some reason the
calibaration data was not found from OTP. OTP is the storage area where
the calibration data is normally stored within QCA9880.

I fought this with .387 firmware and WLE900VX NICs.  If it's a common
problem with more than a single NIC (ie, not just a bad piece of
hardware), then one could load my firmware and my ath10k patches.

That's XB143, right? I think that's different as firmware started to
support XB143 only starting from 10.1.467.

-- 
Kalle Valo