1. use the transport lock to protect transport endpoints list.
2. don't use mixed errno and -1 as the return value, use -1 for all error cases.
Change-Id: I657fa06a6d82ee8dbeefaa3397df2285ba574b80
Signed-off-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9579
Community-CI: Mellanox Build Bot
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
7e524064b3