IB/{hw,sw}: Remove 'uobject->context' dependency in object creation APIs

Now when we have the udata passed to all the ib_xxx object creation APIs
and the additional macro 'rdma_udata_to_drv_context' to get the
ib_ucontext from ib_udata stored in uverbs_attr_bundle, we can finally
start to remove the dependency of the drivers in the
ib_xxx->uobject->context.

Signed-off-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/mlx5/srq.c

@@ -47,6 +47,8 @@ static int create_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq,
 {
 	struct mlx5_ib_dev *dev = to_mdev(pd->device);
 	struct mlx5_ib_create_srq ucmd = {};
+	struct mlx5_ib_ucontext *ucontext = rdma_udata_to_drv_context(
+		udata, struct mlx5_ib_ucontext, ibucontext);
 	size_t ucmdlen;
 	int err;
 	int npages;
@@ -71,8 +73,7 @@ static int create_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq,
 		return -EINVAL;
 
 	if (in->type != IB_SRQT_BASIC) {
-		err = get_srq_user_index(to_mucontext(pd->uobject->context),
-					 &ucmd, udata->inlen, &uidx);
+		err = get_srq_user_index(ucontext, &ucmd, udata->inlen, &uidx);
 		if (err)
 			return err;
 	}
@@ -103,8 +104,7 @@ static int create_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq,
 
 	mlx5_ib_populate_pas(dev, srq->umem, page_shift, in->pas, 0);
 
-	err = mlx5_ib_db_map_user(to_mucontext(pd->uobject->context), udata,
-				  ucmd.db_addr, &srq->db);
+	err = mlx5_ib_db_map_user(ucontext, udata, ucmd.db_addr, &srq->db);
 	if (err) {
 		mlx5_ib_dbg(dev, "map doorbell failed\n");
 		goto err_in;