[PATCH] i40iw: Fix error unwinding when i40iw_hmc_sd_one fails

From: Shiraz Saleem <shiraz.saleem@intel.com>
To: dledford@redhat.com, jgg@nvidia.com
Cc: linux-rdma@vger.kernel.org,
	Sindhu Devale <sindhu.devale@intel.com>,
	Dan Carpenter <dan.carpenter@oracle.com>,
	Shiraz Saleem <shiraz.saleem@intel.com>
Subject: [PATCH] i40iw: Fix error unwinding when i40iw_hmc_sd_one fails
Date: Thu, 15 Apr 2021 19:21:04 -0500	[thread overview]
Message-ID: <20210416002104.323-1-shiraz.saleem@intel.com> (raw)

From: Sindhu Devale <sindhu.devale@intel.com>

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 in [1]

[1] https://lore.kernel.org/linux-rdma/YHV4CFXzqTm23AOZ@mwanda/

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>
---
 drivers/infiniband/hw/i40iw/i40iw_pble.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/hw/i40iw/i40iw_pble.c b/drivers/infiniband/hw/i40iw/i40iw_pble.c
index 53e5cd1..146a414 100644
--- 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);
-- 
1.8.3.1

