[IB] mthca: Don't enter QP into MCG more than once.
Avoid entering a QP as member of a multicast group multiple times. Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il> Signed-off-by: Roland Dreier <rolandd@cisco.com>
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@ -185,7 +185,12 @@ int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
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}
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for (i = 0; i < MTHCA_QP_PER_MGM; ++i)
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if (!(mgm->qp[i] & cpu_to_be32(1 << 31))) {
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if (mgm->qp[i] == cpu_to_be32(ibqp->qp_num | (1 << 31))) {
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mthca_dbg(dev, "QP %06x already a member of MGM\n",
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ibqp->qp_num);
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err = 0;
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goto out;
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} else if (!(mgm->qp[i] & cpu_to_be32(1 << 31))) {
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mgm->qp[i] = cpu_to_be32(ibqp->qp_num | (1 << 31));
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break;
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}
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