tty: tty_buffer: invert conditions in __tty_buffer_request_room()
We are used to handle "bad" states in the 'if's in the kernel. Refactor (invert the two conditions in) __tty_buffer_request_room(), so that the code returns from the fast paths immediately instead of postponing to the heavy end of the function. Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org> Link: https://lore.kernel.org/r/20230816105530.3335-11-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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