RDMA/mad: Do not check MAD sizes in roce and ib drivers

All callers for process_mad allocate MAD structures with proper sizes,
there is no need to recheck it.
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/mlx4/mad.c

@@ -992,10 +992,6 @@ int mlx4_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 	struct ib_mad *out_mad = (struct ib_mad *)out;
 	enum rdma_link_layer link = rdma_port_get_link_layer(ibdev, port_num);
 
-	if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
-			 *out_mad_size != sizeof(*out_mad)))
-		return IB_MAD_RESULT_FAILURE;
-
 	/* iboe_process_mad() which uses the HCA flow-counters to implement IB PMA
 	 * queries, should be called only by VFs and for that specific purpose
 	 */

drivers/infiniband/hw/mlx5/mad.c

@@ -280,10 +280,6 @@ int mlx5_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 	struct ib_mad *out_mad = (struct ib_mad *)out;
 	int ret;
 
-	if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
-			 *out_mad_size != sizeof(*out_mad)))
-		return IB_MAD_RESULT_FAILURE;
-
 	if (MLX5_CAP_GEN(dev->mdev, vport_counters) &&
 	    in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT &&
 	    in_mad->mad_hdr.method == IB_MGMT_METHOD_GET) {

drivers/infiniband/hw/mthca/mthca_mad.c

@@ -212,10 +212,6 @@ int mthca_process_mad(struct ib_device *ibdev,
 	const struct ib_mad *in_mad = (const struct ib_mad *)in;
 	struct ib_mad *out_mad = (struct ib_mad *)out;
 
-	if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
-			 *out_mad_size != sizeof(*out_mad)))
-		return IB_MAD_RESULT_FAILURE;
-
 	/* Forward locally generated traps to the SM */
 	if (in_mad->mad_hdr.method == IB_MGMT_METHOD_TRAP &&
 	    slid == 0) {

drivers/infiniband/hw/ocrdma/ocrdma_ah.c

@@ -261,10 +261,6 @@ int ocrdma_process_mad(struct ib_device *ibdev,
 	const struct ib_mad *in_mad = (const struct ib_mad *)in;
 	struct ib_mad *out_mad = (struct ib_mad *)out;
 
-	if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
-			 *out_mad_size != sizeof(*out_mad)))
-		return IB_MAD_RESULT_FAILURE;
-
 	switch (in_mad->mad_hdr.mgmt_class) {
 	case IB_MGMT_CLASS_PERF_MGMT:
 		dev = get_ocrdma_dev(ibdev);

drivers/infiniband/hw/qib/qib_mad.c

@@ -2396,10 +2396,6 @@ int qib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port,
 	const struct ib_mad *in_mad = (const struct ib_mad *)in;
 	struct ib_mad *out_mad = (struct ib_mad *)out;
 
-	if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||
-			 *out_mad_size != sizeof(*out_mad)))
-		return IB_MAD_RESULT_FAILURE;
-
 	switch (in_mad->mad_hdr.mgmt_class) {
 	case IB_MGMT_CLASS_SUBN_DIRECTED_ROUTE:
 	case IB_MGMT_CLASS_SUBN_LID_ROUTED: