From 7150bf8a98f14f1ba67e090ef2778004c746f465 Mon Sep 17 00:00:00 2001 From: Jack Morgenstein Date: Tue, 18 Oct 2005 14:46:38 -0700 Subject: [PATCH] [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 Signed-off-by: Roland Dreier --- drivers/infiniband/hw/mthca/mthca_mcg.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/infiniband/hw/mthca/mthca_mcg.c b/drivers/infiniband/hw/mthca/mthca_mcg.c index 9a0612a9d30..b47ea7daf08 100644 --- a/drivers/infiniband/hw/mthca/mthca_mcg.c +++ b/drivers/infiniband/hw/mthca/mthca_mcg.c @@ -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; } -- 2.41.0