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H A Dcp210x.cdiff 95168d624f3a8dee466525767200391a0fb006b9 Mon Nov 16 17:18:21 CET 2020 Johan Hovold <johan@kernel.org> USB: serial: cp210x: return early on unchanged termios

Return early from set_termios() in case no relevant terminal settings
have changed.

This avoids testing each parameter in turn and specifically allows the
line-control handling to be cleaned up further.

Signed-off-by: Johan Hovold <johan@kernel.org>