RDMA/iwcm: Use a default listen backlog if needed
commit 2f0304d2 upstream. If the user creates a listening cm_id with backlog of 0 the IWCM ends up not allowing any connection requests at all. The correct behavior is for the IWCM to pick a default value if the user backlog parameter is zero. Lustre from version 1.8.8 onward uses a backlog of 0, which breaks iwarp support without this fix. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <roland@purestorage.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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