RDMA: Use ib_copy_validate_udata_in_cm() for zero comp_mask

All of these cases require a 0 comp_mask. Consolidate these into
using ib_copy_validate_udata_in_cm() and remove the open coded
comp_mask test.

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>

Author: jgunthorpe

drivers/infiniband/hw/efa/efa_verbs.c

@@ -699,11 +699,11 @@ int efa_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *init_attr,
 	if (err)
 		goto err_out;
 
-	err = ib_copy_validate_udata_in(udata, cmd, driver_qp_type);
+	err = ib_copy_validate_udata_in_cm(udata, cmd, driver_qp_type, 0);
 	if (err)
 		goto err_out;
 
-	if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_98)) {
+	if (!is_reserved_cleared(cmd.reserved_98)) {
 		ibdev_dbg(&dev->ibdev,
 			  "Incompatible ABI params, unknown fields in udata\n");
 		err = -EINVAL;
@@ -1140,11 +1140,11 @@ int efa_create_user_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 		goto err_out;
 	}
 
-	err = ib_copy_validate_udata_in(udata, cmd, num_sub_cqs);
+	err = ib_copy_validate_udata_in_cm(udata, cmd, num_sub_cqs, 0);
 	if (err)
 		goto err_out;
 
-	if (cmd.comp_mask || !is_reserved_cleared(cmd.reserved_58)) {
+	if (!is_reserved_cleared(cmd.reserved_58)) {
 		ibdev_dbg(ibdev,
 			  "Incompatible ABI params, unknown fields in udata\n");
 		err = -EINVAL;

drivers/infiniband/hw/mlx4/main.c

@@ -446,13 +446,10 @@ static int mlx4_ib_query_device(struct ib_device *ibdev,
 	struct mlx4_clock_params clock_params;
 
 	if (uhw->inlen) {
-		err = ib_copy_validate_udata_in(uhw, cmd, reserved);
+		err = ib_copy_validate_udata_in_cm(uhw, cmd, reserved, 0);
 		if (err)
 			return err;
 
-		if (cmd.comp_mask)
-			return -EINVAL;
-
 		if (cmd.reserved)
 			return -EINVAL;
 	}

drivers/infiniband/hw/mlx4/qp.c

@@ -720,7 +720,7 @@ static int _mlx4_ib_create_qp_rss(struct ib_pd *pd, struct mlx4_ib_qp *qp,
 	if (udata->outlen)
 		return -EOPNOTSUPP;
 
-	err = ib_copy_validate_udata_in(udata, ucmd, reserved1);
+	err = ib_copy_validate_udata_in_cm(udata, ucmd, reserved1, 0);
 	if (err) {
 		pr_debug("copy failed\n");
 		return err;
@@ -729,7 +729,7 @@ static int _mlx4_ib_create_qp_rss(struct ib_pd *pd, struct mlx4_ib_qp *qp,
 	if (memchr_inv(ucmd.reserved, 0, sizeof(ucmd.reserved)))
 		return -EOPNOTSUPP;
 
-	if (ucmd.comp_mask || ucmd.reserved1)
+	if (ucmd.reserved1)
 		return -EOPNOTSUPP;
 
 	if (init_attr->qp_type != IB_QPT_RAW_PACKET) {
@@ -866,12 +866,11 @@ static int create_rq(struct ib_pd *pd, struct ib_qp_init_attr *init_attr,
 
 	qp->state = IB_QPS_RESET;
 
-	err = ib_copy_validate_udata_in(udata, wq, comp_mask);
+	err = ib_copy_validate_udata_in_cm(udata, wq, comp_mask, 0);
 	if (err)
 		goto err;
 
-	if (wq.comp_mask || wq.reserved[0] || wq.reserved[1] ||
-	    wq.reserved[2]) {
+	if (wq.reserved[0] || wq.reserved[1] || wq.reserved[2]) {
 		pr_debug("user command isn't supported\n");
 		err = -EOPNOTSUPP;
 		goto err;
@@ -4235,11 +4234,11 @@ int mlx4_ib_modify_wq(struct ib_wq *ibwq, struct ib_wq_attr *wq_attr,
 	enum ib_wq_state cur_state, new_state;
 	int err;
 
-	err = ib_copy_validate_udata_in(udata, ucmd, reserved);
+	err = ib_copy_validate_udata_in_cm(udata, ucmd, reserved, 0);
 	if (err)
 		return err;
 
-	if (ucmd.comp_mask || ucmd.reserved)
+	if (ucmd.reserved)
 		return -EOPNOTSUPP;
 
 	if (wq_attr_mask & IB_WQ_FLAGS)

drivers/infiniband/hw/mlx5/qp.c

@@ -5611,11 +5611,11 @@ int mlx5_ib_modify_wq(struct ib_wq *wq, struct ib_wq_attr *wq_attr,
 	void *rqc;
 	void *in;
 
-	err = ib_copy_validate_udata_in(udata, ucmd, reserved);
+	err = ib_copy_validate_udata_in_cm(udata, ucmd, reserved, 0);
 	if (err)
 		return err;
 
-	if (ucmd.comp_mask || ucmd.reserved)
+	if (ucmd.reserved)
 		return -EOPNOTSUPP;
 
 	inlen = MLX5_ST_SZ_BYTES(modify_rq_in);