IB/ipath: Fix RDMA reads of length zero and error handling
Fix RDMA read response length checking for RDMA_READ_RESPONSE_ONLY to allow a zero length response. RDMA read responses which don't match the expected length or occur in response to some other operation should generate a completion queue error (see table 56, ch. 9.9.2.3 in the IB spec). Signed-off-by: NBryan O'Sullivan <bryan.osullivan@qlogic.com> Signed-off-by: NRoland Dreier <rolandd@cisco.com>
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