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[ Upstream commit7a7160edf1] We assume the correct errno is -EADDRINUSE when sk->sk_prot->get_port() fails, so some ->get_port() functions return just 1 on failure and the callers return -EADDRINUSE instead. However, mptcp_get_port() can return -EINVAL. Let's not ignore the error. Note the only exception is inet_autobind(), all of whose callers return -EAGAIN instead. Fixes:cec37a6e41("mptcp: Handle MP_CAPABLE options for outgoing connections") Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.