Jack Morgenstein wrote:
+static inline int rcv_has_same_gid(struct ib_mad_send_wr_private *wr,
+ struct ib_mad_recv_wc *rwc )
+{
+ struct ib_ah_attr attr;
+ u8 send_resp, rcv_resp;
+
+ send_resp = ((struct ib_mad *)(wr->send_buf.mad))->
+ mad_hdr.method & IB_MGMT_METHOD_RESP;
+ rcv_resp = rwc->recv_buf.mad->mad_hdr.method & IB_MGMT_METHOD_RESP;
+
+ if (!send_resp && rcv_resp)
+ /* is request/response. GID/LIDs are both local (same). */
+ return 1;
+
+ if (send_resp == rcv_resp)
+ /* both requests, or both responses. GIDs different */
+ return 0;
The two checks above are only checking response bits of a sent and received MAD.
How do these relate to checking the GIDs?
+ if (ib_query_ah(wr->send_buf.ah, &attr))
+ /* Assume not equal, to avoid false positives. */
+ return 0;
Querying for the address handle every time seems expensive. Can't we save the
necessary information inside the ah? Failing that, we should move the query
when sending a MAD, so it can be done once.
- Sean
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