Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma

Pull rdma updates from Jason Gunthorpe:
 "A smaller cycle this time. Notably we see another new driver, 'Soft
  iWarp', and the deletion of an ancient unused driver for nes.

   - Revise and simplify the signature offload RDMA MR APIs

   - More progress on hoisting object allocation boiler plate code out
     of the drivers

   - Driver bug fixes and revisions for hns, hfi1, efa, cxgb4, qib,
     i40iw

   - Tree wide cleanups: struct_size, put_user_page, xarray, rst doc
     conversion

   - Removal of obsolete ib_ucm chardev and nes driver

   - netlink based discovery of chardevs and autoloading of the modules
     providing them

   - Move more of the rdamvt/hfi1 uapi to include/uapi/rdma

   - New driver 'siw' for software based iWarp running on top of netdev,
     much like rxe's software RoCE.

   - mlx5 feature to report events in their raw devx format to userspace

   - Expose per-object counters through rdma tool

   - Adaptive interrupt moderation for RDMA (DIM), sharing the DIM core
     from netdev"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (194 commits)
  RMDA/siw: Require a 64 bit arch
  RDMA/siw: Mark expected switch fall-throughs
  RDMA/core: Fix -Wunused-const-variable warnings
  rdma/siw: Remove set but not used variable 's'
  rdma/siw: Add missing dependencies on LIBCRC32C and DMA_VIRT_OPS
  RDMA/siw: Add missing rtnl_lock around access to ifa
  rdma/siw: Use proper enumerated type in map_cqe_status
  RDMA/siw: Remove unnecessary kthread create/destroy printouts
  IB/rdmavt: Fix variable shadowing issue in rvt_create_cq
  RDMA/core: Fix race when resolving IP address
  RDMA/core: Make rdma_counter.h compile stand alone
  IB/core: Work on the caller socket net namespace in nldev_newlink()
  RDMA/rxe: Fill in wc byte_len with IB_WC_RECV_RDMA_WITH_IMM
  RDMA/mlx5: Set RDMA DIM to be enabled by default
  RDMA/nldev: Added configuration of RDMA dynamic interrupt moderation to netlink
  RDMA/core: Provide RDMA DIM support for ULPs
  linux/dim: Implement RDMA adaptive moderation (DIM)
  IB/mlx5: Report correctly tag matching rendezvous capability
  docs: infiniband: add it to the driver-api bookset
  IB/mlx5: Implement VHCA tunnel mechanism in DEVX
  ...

1 files changed, 14 insertions, 29 deletions

diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c
index 022a0b4ea452..a7d238d312f0 100644
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -172,14 +172,14 @@ err_buf:
 }
 
 #define CQ_CREATE_FLAGS_SUPPORTED IB_UVERBS_CQ_FLAGS_TIMESTAMP_COMPLETION
-struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev,
-				const struct ib_cq_init_attr *attr,
-				struct ib_udata *udata)
+int mlx4_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
+		      struct ib_udata *udata)
 {
+	struct ib_device *ibdev = ibcq->device;
 	int entries = attr->cqe;
 	int vector = attr->comp_vector;
 	struct mlx4_ib_dev *dev = to_mdev(ibdev);
-	struct mlx4_ib_cq *cq;
+	struct mlx4_ib_cq *cq = to_mcq(ibcq);
 	struct mlx4_uar *uar;
 	void *buf_addr;
 	int err;
@@ -187,14 +187,10 @@ struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev,
 		udata, struct mlx4_ib_ucontext, ibucontext);
 
 	if (entries < 1 || entries > dev->dev->caps.max_cqes)
-		return ERR_PTR(-EINVAL);
+		return -EINVAL;
 
 	if (attr->flags & ~CQ_CREATE_FLAGS_SUPPORTED)
-		return ERR_PTR(-EINVAL);
-
-	cq = kzalloc(sizeof(*cq), GFP_KERNEL);
-	if (!cq)
-		return ERR_PTR(-ENOMEM);
+		return -EINVAL;
 
 	entries      = roundup_pow_of_two(entries + 1);
 	cq->ibcq.cqe = entries - 1;
@@ -269,7 +265,7 @@ struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev,
 			goto err_cq_free;
 		}
 
-	return &cq->ibcq;
+	return 0;
 
 err_cq_free:
 	mlx4_cq_free(dev->dev, &cq->mcq);
@@ -281,19 +277,15 @@ err_dbmap:
 err_mtt:
 	mlx4_mtt_cleanup(dev->dev, &cq->buf.mtt);
 
-	if (udata)
-		ib_umem_release(cq->umem);
-	else
+	ib_umem_release(cq->umem);
+	if (!udata)
 		mlx4_ib_free_cq_buf(dev, &cq->buf, cq->ibcq.cqe);
 
 err_db:
 	if (!udata)
 		mlx4_db_free(dev->dev, &cq->db);
-
 err_cq:
-	kfree(cq);
-
-	return ERR_PTR(err);
+	return err;
 }
 
 static int mlx4_alloc_resize_buf(struct mlx4_ib_dev *dev, struct mlx4_ib_cq *cq,
@@ -475,18 +467,15 @@ err_buf:
 	kfree(cq->resize_buf);
 	cq->resize_buf = NULL;
 
-	if (cq->resize_umem) {
-		ib_umem_release(cq->resize_umem);
-		cq->resize_umem = NULL;
-	}
-
+	ib_umem_release(cq->resize_umem);
+	cq->resize_umem = NULL;
 out:
 	mutex_unlock(&cq->resize_mutex);
 
 	return err;
 }
 
-int mlx4_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
+void mlx4_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 {
 	struct mlx4_ib_dev *dev = to_mdev(cq->device);
 	struct mlx4_ib_cq *mcq = to_mcq(cq);
@@ -501,15 +490,11 @@ int mlx4_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 				struct mlx4_ib_ucontext,
 				ibucontext),
 			&mcq->db);
-		ib_umem_release(mcq->umem);
 	} else {
 		mlx4_ib_free_cq_buf(dev, &mcq->buf, cq->cqe);
 		mlx4_db_free(dev->dev, &mcq->db);
 	}
-
-	kfree(mcq);
-
-	return 0;
+	ib_umem_release(mcq->umem);
 }
 
 static void dump_cqe(void *cqe)