IB/mthca: check port validity in modify_qp

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>

diff --git a/drivers/infiniband/hw/mthca/mthca_qp.c b/drivers/infiniband/hw/mthca/mthca_qp.c
index d786ef443614734ea2189e83ac746ecbffc357ee..ea45fa400fab2d950a12d5678ec94dd03779146a 100644 (file)
--- 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, struct ib_qp_attr *attr, int attr_mask)
                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",