The changelog from Ben Collins doesn't mention a licensing issue.
As far as I know, only Debian has issue with the firmwares, other distros don't, and they are part of the upstream kernel sources. In fact, the simple fact that Ubuntu kernel source actually ships with the firmwares included makes it a totally moot point. Not enabling them doesn't "fix" a possible licence incompatibility since they are shipped :-)
Hopefully, this is just a mistake from Ben thinking the keyspan_pda driver is a _replacement_ for the other one. It's not. The keyspan_pda is a different (and simpler, it's not very reliable at higher speeds) piece of hardware that uses a different driver. The main keyspan serial driver is still needed for most keyspan serial adapters (including mines ! Ben, please fix it !!!).
The changelog from Ben Collins doesn't mention a licensing issue.
As far as I know, only Debian has issue with the firmwares, other distros don't, and they are part of the upstream kernel sources. In fact, the simple fact that Ubuntu kernel source actually ships with the firmwares included makes it a totally moot point. Not enabling them doesn't "fix" a possible licence incompatibility since they are shipped :-)
Hopefully, this is just a mistake from Ben thinking the keyspan_pda driver is a _replacement_ for the other one. It's not. The keyspan_pda is a different (and simpler, it's not very reliable at higher speeds) piece of hardware that uses a different driver. The main keyspan serial driver is still needed for most keyspan serial adapters (including mines ! Ben, please fix it !!!).