[PATCH v2] net: flow_offload: fix memory leak in nfp_abm_u32_knode_replace

[Navid Emamdoost]

In nfp_abm_u32_knode_replace if the allocation for match fails it should
go to the error handling instead of returning.

Signed-off-by: Navid Emamdoost <navid.emamdo...@gmail.com>
---
Changes in v2:
        - Reused err variable for erorr value returning.
---
 drivers/net/ethernet/netronome/nfp/abm/cls.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/abm/cls.c 
b/drivers/net/ethernet/netronome/nfp/abm/cls.c
index 23ebddfb9532..b0cb9d201f7d 100644
--- a/drivers/net/ethernet/netronome/nfp/abm/cls.c
+++ b/drivers/net/ethernet/netronome/nfp/abm/cls.c
@@ -198,14 +198,18 @@ nfp_abm_u32_knode_replace(struct nfp_abm_link *alink,
                if ((iter->val & cmask) == (val & cmask) &&
                    iter->band != knode->res->classid) {
                        NL_SET_ERR_MSG_MOD(extack, "conflict with already 
offloaded filter");
+                       err = -EOPNOTSUPP;
                        goto err_delete;
                }
        }
 
        if (!match) {
                match = kzalloc(sizeof(*match), GFP_KERNEL);
-               if (!match)
-                       return -ENOMEM;
+               if (!match) {
+                       err = -ENOMEM;
+                       goto err_delete;
+               }
+
                list_add(&match->list, &alink->dscp_map);
        }
        match->handle = knode->handle;
@@ -221,7 +225,7 @@ nfp_abm_u32_knode_replace(struct nfp_abm_link *alink,
 
 err_delete:
        nfp_abm_u32_knode_delete(alink, knode);
-       return -EOPNOTSUPP;
+       return err;
 }
 
 static int nfp_abm_setup_tc_block_cb(enum tc_setup_type type,
-- 
2.17.1