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[IB] mthca: Don't enter QP into MCG more than once.

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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>
This commit is contained in:
Jack Morgenstein 2005-10-18 14:46:38 -07:00 committed by Roland Dreier
parent ba8e931024
commit 7150bf8a98
1 changed files with 6 additions and 1 deletions
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7
drivers/infiniband/hw/mthca/mthca_mcg.c
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@ -185,7 +185,12 @@ int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
}
for (i = 0; i < MTHCA_QP_PER_MGM; ++i)
if (!(mgm->qp[i] & cpu_to_be32(1 << 31))) {
if (mgm->qp[i] == cpu_to_be32(ibqp->qp_num | (1 << 31))) {
mthca_dbg(dev, "QP %06x already a member of MGM\n",
ibqp->qp_num);
err = 0;
goto out;
} else if (!(mgm->qp[i] & cpu_to_be32(1 << 31))) {
mgm->qp[i] = cpu_to_be32(ibqp->qp_num | (1 << 31));
break;
}