[PATCH rdma-next v2 6/9] RDMA: Allow fail of destroy CQ

[Leon Romanovsky <leon@kernel.org>]

From: Leon Romanovsky <leonro@mellanox.com>

Like any other verbs object, CQ shouldn't fail during destroy,
but mlx5_ib didn't follow this contract while mixed IB verbs objects
with DEVX. Such mix causes to the situation where FW and kernel
are fully dependent on the reference counting of another side.

Kernel verbs and drivers that don't have DEVX flows shouldn't fail.

Fixes: e39afe3d6dbd ("RDMA: Convert CQ allocations to be under core responsibility")
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
---
 drivers/infiniband/core/cq.c                    |  5 ++++-
 drivers/infiniband/core/verbs.c                 |  9 +++++++--
 drivers/infiniband/hw/bnxt_re/ib_verbs.c        |  3 ++-
 drivers/infiniband/hw/bnxt_re/ib_verbs.h        |  2 +-
 drivers/infiniband/hw/cxgb4/cq.c                |  3 ++-
 drivers/infiniband/hw/cxgb4/iw_cxgb4.h          |  2 +-
 drivers/infiniband/hw/efa/efa.h                 |  2 +-
 drivers/infiniband/hw/efa/efa_verbs.c           |  3 ++-
 drivers/infiniband/hw/hns/hns_roce_cq.c         |  3 ++-
 drivers/infiniband/hw/hns/hns_roce_device.h     |  4 ++--
 drivers/infiniband/hw/hns/hns_roce_hw_v1.c      |  3 ++-
 drivers/infiniband/hw/i40iw/i40iw_verbs.c       |  3 ++-
 drivers/infiniband/hw/mlx4/cq.c                 |  3 ++-
 drivers/infiniband/hw/mlx4/mlx4_ib.h            |  2 +-
 drivers/infiniband/hw/mlx5/cq.c                 | 16 +++++++++++-----
 drivers/infiniband/hw/mlx5/mlx5_ib.h            |  2 +-
 drivers/infiniband/hw/mthca/mthca_provider.c    |  3 ++-
 drivers/infiniband/hw/ocrdma/ocrdma_verbs.c     |  3 ++-
 drivers/infiniband/hw/ocrdma/ocrdma_verbs.h     |  2 +-
 drivers/infiniband/hw/qedr/verbs.c              |  5 +++--
 drivers/infiniband/hw/qedr/verbs.h              |  2 +-
 drivers/infiniband/hw/usnic/usnic_ib_verbs.c    |  4 ++--
 drivers/infiniband/hw/usnic/usnic_ib_verbs.h    |  2 +-
 drivers/infiniband/hw/vmw_pvrdma/pvrdma_cq.c    |  3 ++-
 drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h |  2 +-
 drivers/infiniband/sw/rdmavt/cq.c               |  3 ++-
 drivers/infiniband/sw/rdmavt/cq.h               |  2 +-
 drivers/infiniband/sw/rxe/rxe_verbs.c           |  3 ++-
 drivers/infiniband/sw/siw/siw_verbs.c           |  3 ++-
 drivers/infiniband/sw/siw/siw_verbs.h           |  2 +-
 include/rdma/ib_verbs.h                         |  6 ++++--
 31 files changed, 70 insertions(+), 40 deletions(-)

diff --git a/drivers/infiniband/core/cq.c b/drivers/infiniband/core/cq.c
index ab556407803c..11edf7308eac 100644
--- a/drivers/infiniband/core/cq.c
+++ b/drivers/infiniband/core/cq.c
@@ -319,6 +319,8 @@ EXPORT_SYMBOL(__ib_alloc_cq_any);
  */
 void ib_free_cq(struct ib_cq *cq)
 {
+	int ret;
+
 	if (WARN_ON_ONCE(atomic_read(&cq->usecnt)))
 		return;
 	if (WARN_ON_ONCE(cq->cqe_used))
@@ -340,8 +342,9 @@ void ib_free_cq(struct ib_cq *cq)
 
 	rdma_dim_destroy(cq);
 	trace_cq_free(cq);
+	ret = cq->device->ops.destroy_cq(cq, NULL);
+	WARN_ONCE(ret, "Destroy of kernel CQ shouldn't fail");
 	rdma_restrack_del(&cq->res);
-	cq->device->ops.destroy_cq(cq, NULL);
 	kfree(cq->wc);
 	kfree(cq);
 }
diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 41e2e35fa090..93503f10bcbb 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -2023,16 +2023,21 @@ EXPORT_SYMBOL(rdma_set_cq_moderation);
 
 int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata)
 {
+	int ret;
+
 	if (WARN_ON_ONCE(cq->shared))
 		return -EOPNOTSUPP;
 
 	if (atomic_read(&cq->usecnt))
 		return -EBUSY;
 
+	ret = cq->device->ops.destroy_cq(cq, udata);
+	if (ret)
+		return ret;
+
 	rdma_restrack_del(&cq->res);
-	cq->device->ops.destroy_cq(cq, udata);
 	kfree(cq);
-	return 0;
+	return ret;
 }
 EXPORT_SYMBOL(ib_destroy_cq_user);
 
diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index cb5074575ba9..4f07011e04eb 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -2803,7 +2803,7 @@ int bnxt_re_post_recv(struct ib_qp *ib_qp, const struct ib_recv_wr *wr,
 }
 
 /* Completion Queues */
-void bnxt_re_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
+int bnxt_re_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
 {
 	struct bnxt_re_cq *cq;
 	struct bnxt_qplib_nq *nq;
@@ -2819,6 +2819,7 @@ void bnxt_re_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
 	atomic_dec(&rdev->cq_count);
 	nq->budget--;
 	kfree(cq->cql);
+	return 0;
 }
 
 int bnxt_re_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.h b/drivers/infiniband/hw/bnxt_re/ib_verbs.h
index 7ca232809466..9a8130b79256 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.h
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.h
@@ -193,7 +193,7 @@ int bnxt_re_post_recv(struct ib_qp *qp, const struct ib_recv_wr *recv_wr,
 		      const struct ib_recv_wr **bad_recv_wr);
 int bnxt_re_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 		      struct ib_udata *udata);
-void bnxt_re_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
+int bnxt_re_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
 int bnxt_re_poll_cq(struct ib_cq *cq, int num_entries, struct ib_wc *wc);
 int bnxt_re_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
 struct ib_mr *bnxt_re_get_dma_mr(struct ib_pd *pd, int mr_access_flags);
diff --git a/drivers/infiniband/hw/cxgb4/cq.c b/drivers/infiniband/hw/cxgb4/cq.c
index 352b8af1998a..28349ed50885 100644
--- a/drivers/infiniband/hw/cxgb4/cq.c
+++ b/drivers/infiniband/hw/cxgb4/cq.c
@@ -967,7 +967,7 @@ int c4iw_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc)
 	return !err || err == -ENODATA ? npolled : err;
 }
 
-void c4iw_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
+int c4iw_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
 {
 	struct c4iw_cq *chp;
 	struct c4iw_ucontext *ucontext;
@@ -985,6 +985,7 @@ void c4iw_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
 		   ucontext ? &ucontext->uctx : &chp->cq.rdev->uctx,
 		   chp->destroy_skb, chp->wr_waitp);
 	c4iw_put_wr_wait(chp->wr_waitp);
+	return 0;
 }
 
 int c4iw_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
diff --git a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
index fa91e80869c0..dc65811e6a93 100644
--- a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
+++ b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h
@@ -992,7 +992,7 @@ struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start,
 					   struct ib_udata *udata);
 struct ib_mr *c4iw_get_dma_mr(struct ib_pd *pd, int acc);
 int c4iw_dereg_mr(struct ib_mr *ib_mr, struct ib_udata *udata);
-void c4iw_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata);
+int c4iw_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata);
 int c4iw_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 		   struct ib_udata *udata);
 int c4iw_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags);
diff --git a/drivers/infiniband/hw/efa/efa.h b/drivers/infiniband/hw/efa/efa.h
index 6b06ce87fbfc..64ae8ba6a7f6 100644
--- a/drivers/infiniband/hw/efa/efa.h
+++ b/drivers/infiniband/hw/efa/efa.h
@@ -139,7 +139,7 @@ int efa_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata);
 struct ib_qp *efa_create_qp(struct ib_pd *ibpd,
 			    struct ib_qp_init_attr *init_attr,
 			    struct ib_udata *udata);
-void efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata);
+int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata);
 int efa_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 		  struct ib_udata *udata);
 struct ib_mr *efa_reg_mr(struct ib_pd *ibpd, u64 start, u64 length,
diff --git a/drivers/infiniband/hw/efa/efa_verbs.c b/drivers/infiniband/hw/efa/efa_verbs.c
index a03e3514bd8a..57910bcfc572 100644
--- a/drivers/infiniband/hw/efa/efa_verbs.c
+++ b/drivers/infiniband/hw/efa/efa_verbs.c
@@ -973,7 +973,7 @@ static int efa_destroy_cq_idx(struct efa_dev *dev, int cq_idx)
 	return efa_com_destroy_cq(&dev->edev, &params);
 }
 
-void efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
+int efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 {
 	struct efa_dev *dev = to_edev(ibcq->device);
 	struct efa_cq *cq = to_ecq(ibcq);
@@ -986,6 +986,7 @@ void efa_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 	efa_destroy_cq_idx(dev, cq->cq_idx);
 	efa_free_mapped(dev, cq->cpu_addr, cq->dma_addr, cq->size,
 			DMA_FROM_DEVICE);
+	return 0;
 }
 
 static int cq_mmap_entries_setup(struct efa_dev *dev, struct efa_cq *cq,
diff --git a/drivers/infiniband/hw/hns/hns_roce_cq.c b/drivers/infiniband/hw/hns/hns_roce_cq.c
index e87d616f7988..c5acf3332519 100644
--- a/drivers/infiniband/hw/hns/hns_roce_cq.c
+++ b/drivers/infiniband/hw/hns/hns_roce_cq.c
@@ -311,7 +311,7 @@ int hns_roce_create_cq(struct ib_cq *ib_cq, const struct ib_cq_init_attr *attr,
 	return ret;
 }
 
-void hns_roce_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
+int hns_roce_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
 {
 	struct hns_roce_dev *hr_dev = to_hr_dev(ib_cq->device);
 	struct hns_roce_cq *hr_cq = to_hr_cq(ib_cq);
@@ -322,6 +322,7 @@ void hns_roce_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
 	free_cq_buf(hr_dev, hr_cq);
 	free_cq_db(hr_dev, hr_cq, udata);
 	free_cqc(hr_dev, hr_cq);
+	return 0;
 }
 
 void hns_roce_cq_completion(struct hns_roce_dev *hr_dev, u32 cqn)
diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index 462a6a5cd92a..30290a7ce286 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -931,7 +931,7 @@ struct hns_roce_hw {
 	int (*poll_cq)(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
 	int (*dereg_mr)(struct hns_roce_dev *hr_dev, struct hns_roce_mr *mr,
 			struct ib_udata *udata);
-	void (*destroy_cq)(struct ib_cq *ibcq, struct ib_udata *udata);
+	int (*destroy_cq)(struct ib_cq *ibcq, struct ib_udata *udata);
 	int (*modify_cq)(struct ib_cq *cq, u16 cq_count, u16 cq_period);
 	int (*init_eq)(struct hns_roce_dev *hr_dev);
 	void (*cleanup_eq)(struct hns_roce_dev *hr_dev);
@@ -1251,7 +1251,7 @@ int to_hr_qp_type(int qp_type);
 int hns_roce_create_cq(struct ib_cq *ib_cq, const struct ib_cq_init_attr *attr,
 		       struct ib_udata *udata);
 
-void hns_roce_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata);
+int hns_roce_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata);
 int hns_roce_db_map_user(struct hns_roce_ucontext *context,
 			 struct ib_udata *udata, unsigned long virt,
 			 struct hns_roce_db *db);
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
index aeb3a6fa7d47..109f42458c02 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
@@ -3572,7 +3572,7 @@ int hns_roce_v1_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata)
 	return 0;
 }
 
-static void hns_roce_v1_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
+static int hns_roce_v1_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 {
 	struct hns_roce_dev *hr_dev = to_hr_dev(ibcq->device);
 	struct hns_roce_cq *hr_cq = to_hr_cq(ibcq);
@@ -3603,6 +3603,7 @@ static void hns_roce_v1_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 		}
 		wait_time++;
 	}
+	return 0;
 }
 
 static void set_eq_cons_index_v1(struct hns_roce_eq *eq, int req_not)
diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
index c0f796cb6e5e..6f40d1d82a25 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
@@ -1053,7 +1053,7 @@ void i40iw_cq_wq_destroy(struct i40iw_device *iwdev, struct i40iw_sc_cq *cq)
  * @ib_cq: cq pointer
  * @udata: user data or NULL for kernel object
  */
-static void i40iw_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
+static int i40iw_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
 {
 	struct i40iw_cq *iwcq;
 	struct i40iw_device *iwdev;
@@ -1065,6 +1065,7 @@ static void i40iw_destroy_cq(struct ib_cq *ib_cq, struct ib_udata *udata)
 	i40iw_cq_wq_destroy(iwdev, cq);
 	cq_free_resources(iwdev, iwcq);
 	i40iw_rem_devusecount(iwdev);
+	return 0;
 }
 
 /**
diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c
index 8a3436994f80..ee50dd823a8e 100644
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -475,7 +475,7 @@ int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata)
 	return err;
 }
 
-void mlx4_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
+int 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);
@@ -495,6 +495,7 @@ void mlx4_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 		mlx4_db_free(dev->dev, &mcq->db);
 	}
 	ib_umem_release(mcq->umem);
+	return 0;
 }
 
 static void dump_cqe(void *cqe)
diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h
index 392a5a7c2a31..32a024f765ea 100644
--- a/drivers/infiniband/hw/mlx4/mlx4_ib.h
+++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h
@@ -742,7 +742,7 @@ int mlx4_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);
 int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata);
 int mlx4_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 		      struct ib_udata *udata);
-void mlx4_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
+int mlx4_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
 int mlx4_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
 int mlx4_ib_arm_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
 void __mlx4_ib_cq_clean(struct mlx4_ib_cq *cq, u32 qpn, struct mlx4_ib_srq *srq);
diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c
index dec0b7bc0ad1..e22542454bfc 100644
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -1024,16 +1024,22 @@ int mlx5_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 	return err;
 }
 
-void mlx5_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
+int mlx5_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 {
 	struct mlx5_ib_dev *dev = to_mdev(cq->device);
 	struct mlx5_ib_cq *mcq = to_mcq(cq);
+	int ret;
 
-	mlx5_core_destroy_cq(dev->mdev, &mcq->mcq);
-	if (udata)
+	ret = mlx5_core_destroy_cq(dev->mdev, &mcq->mcq);
+	if (ret && udata)
+		return ret;
+
+	if (udata) {
 		destroy_cq_user(mcq, udata);
-	else
-		destroy_cq_kernel(dev, mcq);
+		return 0;
+	}
+	destroy_cq_kernel(dev, mcq);
+	return ret;
 }
 
 static int is_equal_rsn(struct mlx5_cqe64 *cqe64, u32 rsn)
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index b7b00e9e180b..0a65f7ba40c4 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -1151,7 +1151,7 @@ int mlx5_ib_read_wqe_srq(struct mlx5_ib_srq *srq, int wqe_index, void *buffer,
 			 size_t buflen, size_t *bc);
 int mlx5_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 		      struct ib_udata *udata);
-void mlx5_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
+int mlx5_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
 int mlx5_ib_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
 int mlx5_ib_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags);
 int mlx5_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);
diff --git a/drivers/infiniband/hw/mthca/mthca_provider.c b/drivers/infiniband/hw/mthca/mthca_provider.c
index 5d1e17214f0c..4624b975fee2 100644
--- a/drivers/infiniband/hw/mthca/mthca_provider.c
+++ b/drivers/infiniband/hw/mthca/mthca_provider.c
@@ -792,7 +792,7 @@ static int mthca_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *uda
 	return ret;
 }
 
-static void mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
+static int mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 {
 	if (udata) {
 		struct mthca_ucontext *context =
@@ -811,6 +811,7 @@ static void mthca_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 				    to_mcq(cq)->set_ci_db_index);
 	}
 	mthca_free_cq(to_mdev(cq->device), to_mcq(cq));
+	return 0;
 }
 
 static inline u32 convert_access(int acc)
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
index ed8c89c0b3e8..b24437619412 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -1057,7 +1057,7 @@ static void ocrdma_flush_cq(struct ocrdma_cq *cq)
 	spin_unlock_irqrestore(&cq->cq_lock, flags);
 }
 
-void ocrdma_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
+int ocrdma_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 {
 	struct ocrdma_cq *cq = get_ocrdma_cq(ibcq);
 	struct ocrdma_eq *eq = NULL;
@@ -1082,6 +1082,7 @@ void ocrdma_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 				ocrdma_get_db_addr(dev, pdid),
 				dev->nic_info.db_page_size);
 	}
+	return 0;
 }
 
 static int ocrdma_add_qpn_map(struct ocrdma_dev *dev, struct ocrdma_qp *qp)
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h
index 4f6806f16e61..425d554e7f3f 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.h
@@ -72,7 +72,7 @@ int ocrdma_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata);
 int ocrdma_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 		     struct ib_udata *udata);
 int ocrdma_resize_cq(struct ib_cq *, int cqe, struct ib_udata *);
-void ocrdma_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata);
+int ocrdma_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata);
 
 struct ib_qp *ocrdma_create_qp(struct ib_pd *,
 			       struct ib_qp_init_attr *attrs,
diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c
index 7d65824f77bc..02368c3df802 100644
--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -1052,7 +1052,7 @@ int qedr_resize_cq(struct ib_cq *ibcq, int new_cnt, struct ib_udata *udata)
 #define QEDR_DESTROY_CQ_MAX_ITERATIONS		(10)
 #define QEDR_DESTROY_CQ_ITER_DURATION		(10)
 
-void qedr_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
+int qedr_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 {
 	struct qedr_dev *dev = get_qedr_dev(ibcq->device);
 	struct qed_rdma_destroy_cq_out_params oparams;
@@ -1067,7 +1067,7 @@ void qedr_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 	/* GSIs CQs are handled by driver, so they don't exist in the FW */
 	if (cq->cq_type == QEDR_CQ_TYPE_GSI) {
 		qedr_db_recovery_del(dev, cq->db_addr, &cq->db.data);
-		return;
+		return 0;
 	}
 
 	iparams.icid = cq->icid;
@@ -1115,6 +1115,7 @@ void qedr_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 	 * Since the destroy CQ ramrod has also been received on the EQ we can
 	 * be certain that there's no event handler in process.
 	 */
+	return 0;
 }
 
 static inline int get_gid_info_from_table(struct ib_qp *ibqp,
diff --git a/drivers/infiniband/hw/qedr/verbs.h b/drivers/infiniband/hw/qedr/verbs.h
index a78b206d8b5a..4620fba34d5f 100644
--- a/drivers/infiniband/hw/qedr/verbs.h
+++ b/drivers/infiniband/hw/qedr/verbs.h
@@ -52,7 +52,7 @@ int qedr_dealloc_pd(struct ib_pd *pd, struct ib_udata *udata);
 int qedr_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 		   struct ib_udata *udata);
 int qedr_resize_cq(struct ib_cq *, int cqe, struct ib_udata *);
-void qedr_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata);
+int qedr_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata);
 int qedr_arm_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags);
 struct ib_qp *qedr_create_qp(struct ib_pd *, struct ib_qp_init_attr *attrs,
 			     struct ib_udata *);
diff --git a/drivers/infiniband/hw/usnic/usnic_ib_verbs.c b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
index 8af3212101be..9e961f8ffa10 100644
--- a/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
+++ b/drivers/infiniband/hw/usnic/usnic_ib_verbs.c
@@ -586,9 +586,9 @@ int usnic_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 	return 0;
 }
 
-void usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
+int usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 {
-	return;
+	return 0;
 }
 
 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
diff --git a/drivers/infiniband/hw/usnic/usnic_ib_verbs.h b/drivers/infiniband/hw/usnic/usnic_ib_verbs.h
index f8911c0330e2..11fe1ba6bbc9 100644
--- a/drivers/infiniband/hw/usnic/usnic_ib_verbs.h
+++ b/drivers/infiniband/hw/usnic/usnic_ib_verbs.h
@@ -58,7 +58,7 @@ int usnic_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 				int attr_mask, struct ib_udata *udata);
 int usnic_ib_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 		       struct ib_udata *udata);
-void usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
+int usnic_ib_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
 struct ib_mr *usnic_ib_reg_mr(struct ib_pd *pd, u64 start, u64 length,
 				u64 virt_addr, int access_flags,
 				struct ib_udata *udata);
diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_cq.c b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_cq.c
index 01cd122a8b69..32aede5a3381 100644
--- a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_cq.c
+++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_cq.c
@@ -235,7 +235,7 @@ static void pvrdma_free_cq(struct pvrdma_dev *dev, struct pvrdma_cq *cq)
  * @cq: the completion queue to destroy.
  * @udata: user data or null for kernel object
  */
-void pvrdma_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
+int pvrdma_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 {
 	struct pvrdma_cq *vcq = to_vcq(cq);
 	union pvrdma_cmd_req req;
@@ -261,6 +261,7 @@ void pvrdma_destroy_cq(struct ib_cq *cq, struct ib_udata *udata)
 
 	pvrdma_free_cq(dev, vcq);
 	atomic_dec(&dev->num_cqs);
+	return 0;
 }
 
 static inline struct pvrdma_cqe *get_cqe(struct pvrdma_cq *cq, int i)
diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h
index f9edce71b79b..97ed8f952f6e 100644
--- a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h
+++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_verbs.h
@@ -411,7 +411,7 @@ int pvrdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg,
 		     int sg_nents, unsigned int *sg_offset);
 int pvrdma_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 		     struct ib_udata *udata);
-void pvrdma_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
+int pvrdma_destroy_cq(struct ib_cq *cq, struct ib_udata *udata);
 int pvrdma_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc);
 int pvrdma_req_notify_cq(struct ib_cq *cq, enum ib_cq_notify_flags flags);
 int pvrdma_create_ah(struct ib_ah *ah, struct rdma_ah_init_attr *init_attr,
diff --git a/drivers/infiniband/sw/rdmavt/cq.c b/drivers/infiniband/sw/rdmavt/cq.c
index 04d2e72017fe..19248be14093 100644
--- a/drivers/infiniband/sw/rdmavt/cq.c
+++ b/drivers/infiniband/sw/rdmavt/cq.c
@@ -315,7 +315,7 @@ int rvt_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
  *
  * Called by ib_destroy_cq() in the generic verbs code.
  */
-void rvt_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
+int rvt_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 {
 	struct rvt_cq *cq = ibcq_to_rvtcq(ibcq);
 	struct rvt_dev_info *rdi = cq->rdi;
@@ -328,6 +328,7 @@ void rvt_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 		kref_put(&cq->ip->ref, rvt_release_mmap_info);
 	else
 		vfree(cq->kqueue);
+	return 0;
 }
 
 /**
diff --git a/drivers/infiniband/sw/rdmavt/cq.h b/drivers/infiniband/sw/rdmavt/cq.h
index 5e26a2eb19a4..feb01e7ee004 100644
--- a/drivers/infiniband/sw/rdmavt/cq.h
+++ b/drivers/infiniband/sw/rdmavt/cq.h
@@ -53,7 +53,7 @@
 
 int rvt_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 		  struct ib_udata *udata);
-void rvt_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata);
+int rvt_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata);
 int rvt_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags notify_flags);
 int rvt_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata);
 int rvt_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *entry);
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index df5e9b0157ef..5a4087b01757 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -779,13 +779,14 @@ static int rxe_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr,
 	return rxe_add_to_pool(&rxe->cq_pool, &cq->pelem);
 }
 
-static void rxe_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
+static int rxe_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata)
 {
 	struct rxe_cq *cq = to_rcq(ibcq);
 
 	rxe_cq_disable(cq);
 
 	rxe_drop_ref(cq);
+	return 0;
 }
 
 static int rxe_resize_cq(struct ib_cq *ibcq, int cqe, struct ib_udata *udata)
diff --git a/drivers/infiniband/sw/siw/siw_verbs.c b/drivers/infiniband/sw/siw/siw_verbs.c
index a6ec1e968fb4..7cf3242ffb41 100644
--- a/drivers/infiniband/sw/siw/siw_verbs.c
+++ b/drivers/infiniband/sw/siw/siw_verbs.c
@@ -1056,7 +1056,7 @@ int siw_post_receive(struct ib_qp *base_qp, const struct ib_recv_wr *wr,
 	return rv > 0 ? 0 : rv;
 }
 
-void siw_destroy_cq(struct ib_cq *base_cq, struct ib_udata *udata)
+int siw_destroy_cq(struct ib_cq *base_cq, struct ib_udata *udata)
 {
 	struct siw_cq *cq = to_siw_cq(base_cq);
 	struct siw_device *sdev = to_siw_dev(base_cq->device);
@@ -1074,6 +1074,7 @@ void siw_destroy_cq(struct ib_cq *base_cq, struct ib_udata *udata)
 	atomic_dec(&sdev->num_cq);
 
 	vfree(cq->queue);
+	return 0;
 }
 
 /*
diff --git a/drivers/infiniband/sw/siw/siw_verbs.h b/drivers/infiniband/sw/siw/siw_verbs.h
index ed2d8ac2f967..637454529357 100644
--- a/drivers/infiniband/sw/siw/siw_verbs.h
+++ b/drivers/infiniband/sw/siw/siw_verbs.h
@@ -62,7 +62,7 @@ int siw_post_send(struct ib_qp *base_qp, const struct ib_send_wr *wr,
 		  const struct ib_send_wr **bad_wr);
 int siw_post_receive(struct ib_qp *base_qp, const struct ib_recv_wr *wr,
 		     const struct ib_recv_wr **bad_wr);
-void siw_destroy_cq(struct ib_cq *base_cq, struct ib_udata *udata);
+int siw_destroy_cq(struct ib_cq *base_cq, struct ib_udata *udata);
 int siw_poll_cq(struct ib_cq *base_cq, int num_entries, struct ib_wc *wc);
 int siw_req_notify_cq(struct ib_cq *base_cq, enum ib_cq_notify_flags flags);
 struct ib_mr *siw_reg_user_mr(struct ib_pd *base_pd, u64 start, u64 len,
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index e2e80e9785db..96f6be189993 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2429,7 +2429,7 @@ struct ib_device_ops {
 	int (*create_cq)(struct ib_cq *cq, const struct ib_cq_init_attr *attr,
 			 struct ib_udata *udata);
 	int (*modify_cq)(struct ib_cq *cq, u16 cq_count, u16 cq_period);
-	void (*destroy_cq)(struct ib_cq *cq, struct ib_udata *udata);
+	int (*destroy_cq)(struct ib_cq *cq, struct ib_udata *udata);
 	int (*resize_cq)(struct ib_cq *cq, int cqe, struct ib_udata *udata);
 	struct ib_mr *(*get_dma_mr)(struct ib_pd *pd, int mr_access_flags);
 	struct ib_mr *(*reg_user_mr)(struct ib_pd *pd, u64 start, u64 length,
@@ -3896,7 +3896,9 @@ int ib_destroy_cq_user(struct ib_cq *cq, struct ib_udata *udata);
  */
 static inline void ib_destroy_cq(struct ib_cq *cq)
 {
-	ib_destroy_cq_user(cq, NULL);
+	int ret = ib_destroy_cq_user(cq, NULL);
+
+	WARN_ONCE(ret, "Destroy of kernel CQ shouldn't fail");
 }
 
 /**
-- 
2.26.2