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Commit 7150bf8a authored by Jack Morgenstein's avatar Jack Morgenstein Committed by Roland Dreier
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[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: default avatarJack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent ba8e9310

drivers/infiniband/hw/mthca/mthca_mcg.c

+6 −1
Original line number Diff line number Diff line
@@ -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;

		}