net/smc: fix error return code in smc_setsockopt()
Fix to return error code -EINVAL instead of 0 if optlen is invalid. Fixes: 01d2f7e2 ("net/smc: sockopts TCP_NODELAY and TCP_CORK") Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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