So I struggled with finding a decent wifi driver for my Acer Aspire E-573 on Ubuntu Mate 15.10 (kernel version 4.2.0), whose particulars are as follows:
03:00.0 Network controller: Qualcomm Atheros Device 0042 (rev 30)
Subsystem: Lite-On Communications Inc Device 0806
But unfortunately, until now, I was making do with dirty hacks such as these. Needless to say, stability was needed.
But thanks to my tinkering with a parallel Arch installation on the same machine, I stumbled upon this – Qualcomm-Atheros-QCA9377-Wifi-Linux.
The README is enough to guide you through.
Thank god for Arch forums!