[ofa-general] [PATCH v2] RDMA/nes: Fix resource issues in nes_create_cq and nes_destroy_cq

[Chien Tung]

From: Miroslaw Walukiewicz <miroslaw.walukiewicz at intel.com>

In error paths where a CQ is not created, pbl is not freeed properly.

In nes_destroy_cq, add the corresponding check for nescq->mcrqf
to not call nes_free_resource when it is already done in
nes_create_cq.

Signed-off-by: Miroslaw Walukiewicz <miroslaw.walukiewicz at intel.com>
Signed-off-by: Chien Tung <chien.tin.tung at intel.com>
---
V2 change:

include missing mcrqf in nes_cq structure.

 drivers/infiniband/hw/nes/nes_verbs.c |   26 +++++++++++++++++++++++++-
 drivers/infiniband/hw/nes/nes_verbs.h |    1 +
 2 files changed, 26 insertions(+), 1 deletions(-)

diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c
index 504e31d..8b460c2 100644
--- a/drivers/infiniband/hw/nes/nes_verbs.c
+++ b/drivers/infiniband/hw/nes/nes_verbs.c
@@ -1627,6 +1627,7 @@ static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
 				nescq->hw_cq.cq_number = nes_ucontext->mcrqf & 0xffff;
 			else
 				nescq->hw_cq.cq_number = nesvnic->mcrq_qp_id + nes_ucontext->mcrqf-1;
+			nescq->mcrqf = nes_ucontext->mcrqf;
 			nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
 		}
 		nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
@@ -1682,6 +1683,12 @@ static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
 		if (!context)
 			pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
 					nescq->hw_cq.cq_pbase);
+		else {
+			pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
+					    nespbl->pbl_vbase, nespbl->pbl_pbase);
+			kfree(nespbl);
+		}
+
 		nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
 		kfree(nescq);
 		return ERR_PTR(-ENOMEM);
@@ -1705,6 +1712,11 @@ static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
 				if (!context)
 					pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
 							nescq->hw_cq.cq_pbase);
+				else {
+					pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
+							    nespbl->pbl_vbase, nespbl->pbl_pbase);
+					kfree(nespbl);
+				}
 				nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
 				kfree(nescq);
 				return ERR_PTR(-ENOMEM);
@@ -1722,6 +1734,11 @@ static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
 				if (!context)
 					pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
 							nescq->hw_cq.cq_pbase);
+				else {
+					pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
+							    nespbl->pbl_vbase, nespbl->pbl_pbase);
+					kfree(nespbl);
+				}
 				nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
 				kfree(nescq);
 				return ERR_PTR(-ENOMEM);
@@ -1774,6 +1791,11 @@ static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
 		if (!context)
 			pci_free_consistent(nesdev->pcidev, nescq->cq_mem_size, mem,
 					nescq->hw_cq.cq_pbase);
+		else {
+			pci_free_consistent(nesdev->pcidev, nespbl->pbl_size,
+					    nespbl->pbl_vbase, nespbl->pbl_pbase);
+			kfree(nespbl);
+		}
 		nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
 		kfree(nescq);
 		return ERR_PTR(-EIO);
@@ -1855,7 +1877,9 @@ static int nes_destroy_cq(struct ib_cq *ib_cq)
 	set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_OPCODE_IDX, opcode);
 	set_wqe_32bit_value(cqp_wqe->wqe_words, NES_CQP_WQE_ID_IDX,
 		(nescq->hw_cq.cq_number | ((u32)PCI_FUNC(nesdev->pcidev->devfn) << 16)));
-	nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
+	if (!nescq->mcrqf)
+		nes_free_resource(nesadapter, nesadapter->allocated_cqs, nescq->hw_cq.cq_number);
+
 	atomic_set(&cqp_request->refcount, 2);
 	nes_post_cqp_request(nesdev, cqp_request);
 
diff --git a/drivers/infiniband/hw/nes/nes_verbs.h b/drivers/infiniband/hw/nes/nes_verbs.h
index 5e48f67..41c07f2 100644
--- a/drivers/infiniband/hw/nes/nes_verbs.h
+++ b/drivers/infiniband/hw/nes/nes_verbs.h
@@ -112,6 +112,7 @@ struct nes_cq {
 	spinlock_t       lock;
 	u8               virtual_cq;
 	u8               pad[3];
+	u32		 mcrqf;
 };
 
 struct nes_wq {
-- 
1.5.3.3