[git patch review 3/4] IB/mthca: check port validity in modify_qp

[Roland Dreier <rolandd@cisco.com>]

Modify_qp should check that the physical port number provided
is a legal value.

Signed-off-by: Jack Morgenstein <jackm@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

---

 drivers/infiniband/hw/mthca/mthca_qp.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

38d1e793471d95728219f500bbb8bd25658d73b0
diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c
index d786ef4..ea45fa4 100644
--- a/drivers/infiniband/hw/mthca/mthca_qp.c
+++ b/drivers/infiniband/hw/mthca/mthca_qp.c
@@ -621,6 +621,12 @@ int mthca_modify_qp(struct ib_qp *ibqp, 
 		return -EINVAL;
 	}
 
+	if ((attr_mask & IB_QP_PORT) &&
+	    (attr->port_num == 0 || attr->port_num > dev->limits.num_ports)) {
+		mthca_dbg(dev, "Port number (%u) is invalid\n", attr->port_num);
+		return -EINVAL;
+	}
+
 	if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC &&
 	    attr->max_rd_atomic > dev->limits.max_qp_init_rdma) {
 		mthca_dbg(dev, "Max rdma_atomic as initiator %u too large (max is %d)\n",
-- 
0.99.9n