The patch below avoids entering a QP as member of a multicast group multiple
times.
Signed-off-by: Jack Morgenstein <[EMAIL PROTECTED]>
Index: linux-kernel/infiniband/hw/mthca/mthca_mcg.c
===================================================================
--- linux-kernel/infiniband/hw/mthca/mthca_mcg.c (revision 3632)
+++ linux-kernel/infiniband/hw/mthca/mthca_mcg.c (working copy)
@@ -189,7 +189,12 @@
}
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;
}
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