Comment 316 for bug 1166529

For Ubuntu you do not need to compile the entire kernel (I did that at the beginning, on my system it took hours). It is possible to download the kernel source in ubuntu, copy the build settings of the currently running kernel and compile just that one directory and afterwards replacing that modules.
I pretty much follwed this guide: https://askubuntu.com/questions/515407/how-recipe-to-build-only-one-kernel-module
Note: This guide is for another kernel version at it's example is a modified SCSI driver, so you need to adapt it, but the steps are the same (I've done it on 18.04). Remember to run the make command inside the directory where the patch_ca0132.c file is, as you only want to build that directory. I did not create a special directory for the modified modules, I just replaced the existing ones.
Important issue: The CA0132 seems to remember stuff even after reboots as Connor said, so after building/installing the kernel modules shutdown the system and switch power supply off for one minute, than you should be safe. That was my mistake as I could not get the driver working, after that it works fine.