1. Please describe the problem: "Oxford Semiconductor Ltd OXPCIe952 Dual Native 950 UART" gets wrong baudrate 2. What is the Version-Release number of the kernel: 5.19.4 3. Did it work previously in Fedora? If so, what kernel version did the issue *first* appear? Old kernels are available for download at https://koji.fedoraproject.org/koji/packageinfo?packageID=8 : Works in 5.17.13 4. Can you reproduce this issue? If so, please provide the steps to reproduce the issue below: Connect the serial port (pci id 1415:c158) to some other device with correct baudrate handling and look at non-functioning communication. 5. Does this problem occur with the latest Rawhide kernel? To install the Rawhide kernel, run ``sudo dnf install fedora-repos-rawhide`` followed by ``sudo dnf update --enablerepo=rawhide kernel``: 6. Are you running any modules that not shipped with directly Fedora's kernel?: No 7. Please attach the kernel logs. You can get the complete kernel log for a boot with ``journalctl --no-hostname -k > dmesg.txt``. If the issue occurred on a previous boot, use the journalctl ``-b`` flag. Reverting commits 366f6c955d4d1a5125ffcd6875ead26a3c7a2a1c 9c5c8aaed50bf3478073ab51b8b1f3f5327d3cfa fixes my problems
setting CONFIG_SERIAL_8250_16550A_VARIANTS in .config fixes the problem. See also: https://marc.info/?l=linux-serial&m=166316467517140&w=2
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