From: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Date: Sun, 29 Apr 2018 12:56:30 -0300

These two variants are very close to each other and can be merged
to avoid code duplication. That's what this patchset does.

First, we allow sctp_init_cause to return errors, which then allow us to
add sctp_make_op_error_limited that handles both situations.

Series applied.

But generally, there are a lot of smtp_init_cause() call sites with non-zero
payload length that should start checking the return value now.