It does prevent anyone with a umn.edu email address, be it a student or professor, of submitting patches of _any kind,_ even if they're not part of research at all. A professor might genuinely just find a bug in the Linux kernel running on their machines, fix it, and be unable to submit it.
To be clear, I don't think what the kernel maintainers did is wrong; it's just sad that all past and future potentially genuine contributions to the kernel from the university have been caught in the crossfire.
To be clear, I don't think what the kernel maintainers did is wrong; it's just sad that all past and future potentially genuine contributions to the kernel from the university have been caught in the crossfire.