RDMA/nes: Resurrect error path dead code

Adrian Bunk pointed out that a Coverity scan found some apparently
dead code in nes_verbs.c that really shouldn't have been dead.

The function nes_create_cq() was missing the assignment

	err = 1;

just prior to an iteration that conditionally set err = 0 if a PBL was
found for a given virtual CQ.  I also noticed we should have been
returning -EFAULT on a couple related error paths.

Signed-off-by: Chien Tung <[email protected]>
Signed-off-by: Glenn Streiff <[email protected]>
Signed-off-by: Roland Dreier <[email protected]>

diff --git a/drivers/infiniband/hw/nes/nes_verbs.c b/drivers/infiniband/hw/nes/nes_verbs.c
index 4dafbe16e82a8366aed841269c3d54535c091cfc..201b95ee23cb4033b0ff5db62b9fa720de8956cb 100644 (file)
--- a/drivers/infiniband/hw/nes/nes_verbs.c
+++ b/drivers/infiniband/hw/nes/nes_verbs.c
@@ -1327,7 +1327,7 @@ static struct ib_qp *nes_create_qp(struct ib_pd *ibpd,
                                                                  (long long unsigned int)req.user_wqe_buffers);
                                                        nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
                                                        kfree(nesqp->allocated_buffer);
                                                                  (long long unsigned int)req.user_wqe_buffers);
                                                        nes_free_resource(nesadapter, nesadapter->allocated_qps, qp_num);
                                                        kfree(nesqp->allocated_buffer);

-                                                       return ERR_PTR(-ENOMEM);
+                                                       return ERR_PTR(-EFAULT);

                                                }
                                        }
 
                                                }
                                        }
 


@@ -1674,6 +1674,7 @@ static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
                }
                nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
                                (unsigned long)req.user_cq_buffer, entries);
                }
                nes_debug(NES_DBG_CQ, "CQ Virtual Address = %08lX, size = %u.\n",
                                (unsigned long)req.user_cq_buffer, entries);

+               err = 1;

                list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
                        if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
                                list_del(&nespbl->list);
                list_for_each_entry(nespbl, &nes_ucontext->cq_reg_mem_list, list) {
                        if (nespbl->user_base == (unsigned long )req.user_cq_buffer) {
                                list_del(&nespbl->list);


@@ -1686,7 +1687,7 @@ static struct ib_cq *nes_create_cq(struct ib_device *ibdev, int entries,
                if (err) {
                        nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
                        kfree(nescq);
                if (err) {
                        nes_free_resource(nesadapter, nesadapter->allocated_cqs, cq_num);
                        kfree(nescq);

-                       return ERR_PTR(err);
+                       return ERR_PTR(-EFAULT);

                }
 
                pbl_entries = nespbl->pbl_size >> 3;
                }
 
                pbl_entries = nespbl->pbl_size >> 3;