RDMA/i40iw: Fix error unwinding when i40iw_hmc_sd_one fails

When i40iw_hmc_sd_one fails, chunk is freed without the deletion of chunk
entry in the PBLE info list.

Fix it by adding the chunk entry to the PBLE info list only after
successful addition of SD in i40iw_hmc_sd_one.

This fixes a static checker warning reported here:
  https://lore.kernel.org/linux-rdma/YHV4CFXzqTm23AOZ@mwanda/

Fixes: 9715830157be ("i40iw: add pble resource files")
Link: https://lore.kernel.org/r/20210416002104.323-1-shiraz.saleem@intel.com
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sindhu Devale <sindhu.devale@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/infiniband/hw/i40iw/i40iw_pble.c b/drivers/infiniband/hw/i40iw/i40iw_pble.c
index 53e5cd1..146a414 100644 (file)
--- a/drivers/infiniband/hw/i40iw/i40iw_pble.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_pble.c
@@ -393,12 +393,9 @@ static enum i40iw_status_code add_pble_pool(struct i40iw_sc_dev *dev,
        i40iw_debug(dev, I40IW_DEBUG_PBLE, "next_fpm_addr = %llx chunk_size[%u] = 0x%x\n",
                    pble_rsrc->next_fpm_addr, chunk->size, chunk->size);
        pble_rsrc->unallocated_pble -= (chunk->size >> 3);
-       list_add(&chunk->list, &pble_rsrc->pinfo.clist);
        sd_reg_val = (sd_entry_type == I40IW_SD_TYPE_PAGED) ?
                        sd_entry->u.pd_table.pd_page_addr.pa : sd_entry->u.bp.addr.pa;
-       if (sd_entry->valid)
-               return 0;
-       if (dev->is_pf) {
+       if (dev->is_pf && !sd_entry->valid) {
                ret_code = i40iw_hmc_sd_one(dev, hmc_info->hmc_fn_id,
                                            sd_reg_val, idx->sd_idx,
                                            sd_entry->entry_type, true);
@@ -409,6 +406,7 @@ static enum i40iw_status_code add_pble_pool(struct i40iw_sc_dev *dev,
        }
 
        sd_entry->valid = true;
+       list_add(&chunk->list, &pble_rsrc->pinfo.clist);
        return 0;
  error:
        kfree(chunk);