I'm running Debian 9 including non-free firmware, in order to get my wifi to work. I do apparently have the necessary firmware as my wifi works, but I do still get the following output after running dmesg:
[ 4.225315] ath10k_pci 0000:03:00.0: firmware: failed to load ath10k/pre-cal-pci-0000:03:00.0.bin (-2) [ 4.225317] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/pre-cal-pci-0000:03:00.0.bin failed with error -2 [ 4.225329] ath10k_pci 0000:03:00.0: firmware: failed to load ath10k/cal-pci-0000:03:00.0.bin (-2) [ 4.225330] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/cal-pci-0000:03:00.0.bin failed with error -2
I can't seem to find the files pre-cal-pci-0000:03:00.0.bin or cal-pci-0000:03:00.0.bin anywhere. As my wifi seems to work flawlessly without them, what is the purpose of these firmware files?