Answer by Jeremy31 for Setting up a single driver to be automatically compiled with DKMS from kernel tree

I have already done a DKMS version of the patched btusb.c for the 3.19 kernel

wget https://www.dropbox.com/s/47u2zjrkqvkf1tw/btusbmac-dkms_1.6_all.debdpkg -i btusbmac-dkms_1.6_all.deb

Reboot

If you want to see the source code, you can right click on the deb file and select 'open with archive manager' then extract the files. You will likely have to right click on the folder to change the permissions so that you can read the files in /usr/src/btusbmac-1.6

Tested and confirmed here