[PATCH 0/4] remove useless null checks before free

[PATCH 0/4] remove useless null checks before free

[Stephen Hemminger]

Some small cleanups found by coccinelle null free script

Stephen Hemminger (4):
  net/ice: remove unnecessary null check
  net/bnxt: remove unnecessary null check
  net/zxdh: remove unnecessary null check
  app/test_compress: remove unnecessary null check

 app/test-compress-perf/main.c         | 6 ++----
 drivers/net/bnxt/tf_core/v3/tfo.c     | 6 ++----
 drivers/net/bnxt/tf_ulp/ulp_sc_mgr.c  | 6 ++----
 drivers/net/intel/ice/ice_dcf_sched.c | 6 ++----
 drivers/net/zxdh/zxdh_np.c            | 3 +--
 5 files changed, 9 insertions(+), 18 deletions(-)

-- 
2.53.0

[PATCH 1/4] net/ice: remove unnecessary null check

[Stephen Hemminger]

No need to check for null before calling free.
Found by coccinelle script null_free.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/intel/ice/ice_dcf_sched.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/intel/ice/ice_dcf_sched.c b/drivers/net/intel/ice/ice_dcf_sched.c
index 948774a282..14e902edbe 100644
--- a/drivers/net/intel/ice/ice_dcf_sched.c
+++ b/drivers/net/intel/ice/ice_dcf_sched.c
@@ -877,10 +877,8 @@ static int ice_dcf_hierarchy_commit(struct rte_eth_dev *dev,
 	return ret_val;
 
 fail_clear:
-	if (vf_bw != NULL)
-		free(vf_bw);
-	if (tc_bw != NULL)
-		free(tc_bw);
+	free(vf_bw);
+	free(tc_bw);
 
 	/* clear all the traffic manager configuration */
 	if (clear_on_fail) {
-- 
2.53.0

Re: [PATCH 1/4] net/ice: remove unnecessary null check

[Bruce Richardson]

On Wed, Apr 01, 2026 at 09:40:22AM -0700, Stephen Hemminger wrote:
> No need to check for null before calling free.
> Found by coccinelle script null_free.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> ---
>  drivers/net/intel/ice/ice_dcf_sched.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
Acked-by: Bruce Richardson <bruce.richardson@intel.com>


> diff --git a/drivers/net/intel/ice/ice_dcf_sched.c b/drivers/net/intel/ice/ice_dcf_sched.c
> index 948774a282..14e902edbe 100644
> --- a/drivers/net/intel/ice/ice_dcf_sched.c
> +++ b/drivers/net/intel/ice/ice_dcf_sched.c
> @@ -877,10 +877,8 @@ static int ice_dcf_hierarchy_commit(struct rte_eth_dev *dev,
>  	return ret_val;
>  
>  fail_clear:
> -	if (vf_bw != NULL)
> -		free(vf_bw);
> -	if (tc_bw != NULL)
> -		free(tc_bw);
> +	free(vf_bw);
> +	free(tc_bw);
>  
>  	/* clear all the traffic manager configuration */
>  	if (clear_on_fail) {
> -- 
> 2.53.0
> 

[PATCH 2/4] net/bnxt: remove unnecessary null check

[Stephen Hemminger]

No need to check for null before calling free.
Found by coccinelle script null_free.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/bnxt/tf_core/v3/tfo.c    | 6 ++----
 drivers/net/bnxt/tf_ulp/ulp_sc_mgr.c | 6 ++----
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/net/bnxt/tf_core/v3/tfo.c b/drivers/net/bnxt/tf_core/v3/tfo.c
index 4b1f545476..681d1dd8d3 100644
--- a/drivers/net/bnxt/tf_core/v3/tfo.c
+++ b/drivers/net/bnxt/tf_core/v3/tfo.c
@@ -183,13 +183,11 @@ void tfo_close(void **tfo)
 				}
 			}
 		}
-		if (tim)
-			rte_free(tim);
+		rte_free(tim);
 		tfco->ts_tim = NULL;
 		tfco->tfgo = NULL;
 
-		if (*tfo)
-			rte_free(*tfo);
+		rte_free(*tfo);
 		*tfo = NULL;
 	}
 }
diff --git a/drivers/net/bnxt/tf_ulp/ulp_sc_mgr.c b/drivers/net/bnxt/tf_ulp/ulp_sc_mgr.c
index 23e1b59ca4..3707cd1a2d 100644
--- a/drivers/net/bnxt/tf_ulp/ulp_sc_mgr.c
+++ b/drivers/net/bnxt/tf_ulp/ulp_sc_mgr.c
@@ -169,11 +169,9 @@ ulp_sc_mgr_deinit(struct bnxt_ulp_context *ctxt)
 
 	ulp_sc_mgr_thread_cancel(ctxt);
 
-	if (ulp_sc_info->stats_cache_tbl)
-		rte_free(ulp_sc_info->stats_cache_tbl);
+	rte_free(ulp_sc_info->stats_cache_tbl);
 
-	if (ulp_sc_info->read_data)
-		rte_free(ulp_sc_info->read_data);
+	rte_free(ulp_sc_info->read_data);
 
 	rte_free(ulp_sc_info);
 
-- 
2.53.0

[PATCH 3/4] net/zxdh: remove unnecessary null check

[Stephen Hemminger]

No need to check for null before calling free.
Found by coccinelle script null_free.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/net/zxdh/zxdh_np.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/net/zxdh/zxdh_np.c b/drivers/net/zxdh/zxdh_np.c
index efb57e34f2..b078ec5b6c 100644
--- a/drivers/net/zxdh/zxdh_np.c
+++ b/drivers/net/zxdh/zxdh_np.c
@@ -12383,8 +12383,7 @@ zxdh_np_dtb_acl_data_clear(uint32_t dev_id, uint32_t queue_id,
 				&element_id);
 	free(data_buff);
 	free(mask_buff);
-	if (eram_buff)
-		free(eram_buff);
+	free(eram_buff);
 
 	free(p_entry_arr);
 	ZXDH_COMM_CHECK_DEV_RC(dev_id, rc, "zxdh_np_dtb_acl_dma_insert");
-- 
2.53.0

Re: [PATCH 3/4] net/zxdh: remove unnecessary null check

[Stephen Hemminger]

On Wed,  1 Apr 2026 09:40:24 -0700
Stephen Hemminger <stephen@networkplumber.org> wrote:

> No need to check for null before calling free.
> Found by coccinelle script null_free.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
> ---

Trivial, applied to next-net

[PATCH 4/4] app/test_compress: remove unnecessary null check

[Stephen Hemminger]

No need to check for null before calling free.
Found by coccinelle script null_free.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 app/test-compress-perf/main.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/app/test-compress-perf/main.c b/app/test-compress-perf/main.c
index c9ead02cb4..bc2b185da4 100644
--- a/app/test-compress-perf/main.c
+++ b/app/test-compress-perf/main.c
@@ -392,15 +392,13 @@ comp_perf_dump_dictionary_data(struct comp_test_data *td)
 
 		if (fread(data, data_to_read, 1, f) != 1) {
 			RTE_LOG(ERR, USER1, "Input file could not be read\n");
-			if (td->dictionary_data)
-				rte_free(td->dictionary_data);
+			rte_free(td->dictionary_data);
 			goto end;
 		}
 		if (fseek(f, 0, SEEK_SET) != 0) {
 			RTE_LOG(ERR, USER1,
 				"Size of input could not be calculated\n");
-			if (td->dictionary_data)
-				rte_free(td->dictionary_data);
+			rte_free(td->dictionary_data);
 			goto end;
 		}
 		remaining_data -= data_to_read;
-- 
2.53.0

Re: [PATCH 0/4] remove useless null checks before free

[Thomas Monjalon]

01/04/2026 18:40, Stephen Hemminger:
> Some small cleanups found by coccinelle null free script
> 
> Stephen Hemminger (4):
>   net/ice: remove unnecessary null check
>   net/bnxt: remove unnecessary null check
>   net/zxdh: remove unnecessary null check
>   app/test_compress: remove unnecessary null check

zxdh was merged in next-net

The rest is applied, thanks.