[PATCH 0/3] more null pointer check removal

[PATCH 0/3] more null pointer check removal

[Stephen Hemminger]

Reran the Cocci script to check for unnecessary null
pointer comparisons before free related functions.

Stephen Hemminger (3):
  vdpa/mlx5: remove unnecessary null check
  raw/ifpga: remove unnecessary null check
  dmap/dpaa2: remove unnecessary null check

 drivers/dma/dpaa2/dpaa2_qdma.c      | 6 ++----
 drivers/raw/ifpga/ifpga_rawdev.c    | 3 +--
 drivers/vdpa/mlx5/mlx5_vdpa_virtq.c | 3 +--
 3 files changed, 4 insertions(+), 8 deletions(-)

-- 
2.35.1

[PATCH 1/3] vdpa/mlx5: remove unnecessary null check

[Stephen Hemminger]

Found by nullfree.cocci.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/vdpa/mlx5/mlx5_vdpa_virtq.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/vdpa/mlx5/mlx5_vdpa_virtq.c b/drivers/vdpa/mlx5/mlx5_vdpa_virtq.c
index e025be47d277..e06d6afb676f 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa_virtq.c
+++ b/drivers/vdpa/mlx5/mlx5_vdpa_virtq.c
@@ -285,8 +285,7 @@ mlx5_vdpa_virtq_setup(struct mlx5_vdpa_priv *priv, int index)
 		if (virtq->umems[i].obj)
 			claim_zero(mlx5_glue->devx_umem_dereg
 				   (virtq->umems[i].obj));
-		if (virtq->umems[i].buf)
-			rte_free(virtq->umems[i].buf);
+		rte_free(virtq->umems[i].buf);
 		virtq->umems[i].size = 0;
 		virtq->umems[i].obj = NULL;
 		virtq->umems[i].buf = NULL;
-- 
2.35.1

RE: [PATCH 1/3] vdpa/mlx5: remove unnecessary null check

[Matan Azrad]

From: Stephen Hemminger
> Found by nullfree.cocci.
> 
> Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Matan Azrad <matan@nvidia.com>

[PATCH 2/3] raw/ifpga: remove unnecessary null check

[Stephen Hemminger]

The function rte_kvargs_free handles calling with NULL.
Found by nullfree.cocci.

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

diff --git a/drivers/raw/ifpga/ifpga_rawdev.c b/drivers/raw/ifpga/ifpga_rawdev.c
index ceb18aed8d44..8c05302a65b8 100644
--- a/drivers/raw/ifpga/ifpga_rawdev.c
+++ b/drivers/raw/ifpga/ifpga_rawdev.c
@@ -1768,8 +1768,7 @@ ifpga_vdev_parse_devargs(struct rte_devargs *devargs,
 	ret = 0;
 
 end:
-	if (kvlist)
-		rte_kvargs_free(kvlist);
+	rte_kvargs_free(kvlist);
 
 	return ret;
 }
-- 
2.35.1

[PATCH 3/3] dmap/dpaa2: remove unnecessary null check

[Stephen Hemminger]

The function rte_free already handles being called with NULL.
Found by nullfree.cocci.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 drivers/dma/dpaa2/dpaa2_qdma.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/dma/dpaa2/dpaa2_qdma.c b/drivers/dma/dpaa2/dpaa2_qdma.c
index a93a60565df7..0500e8c22590 100644
--- a/drivers/dma/dpaa2/dpaa2_qdma.c
+++ b/drivers/dma/dpaa2/dpaa2_qdma.c
@@ -1404,11 +1404,9 @@ dpaa2_qdma_reset(struct rte_dma_dev *dev)
 
 	/* Reset and free virtual queues */
 	for (i = 0; i < qdma_dev->num_vqs; i++) {
-		if (qdma_dev->vqs[i].status_ring)
-			rte_ring_free(qdma_dev->vqs[i].status_ring);
+		rte_ring_free(qdma_dev->vqs[i].status_ring);
 	}
-	if (qdma_dev->vqs)
-		rte_free(qdma_dev->vqs);
+	rte_free(qdma_dev->vqs);
 	qdma_dev->vqs = NULL;
 
 	/* Reset QDMA device structure */
-- 
2.35.1

Re: [PATCH 0/3] more null pointer check removal

[Tyler Retzlaff]

On Wed, Jun 22, 2022 at 11:51:55AM -0700, Stephen Hemminger wrote:
> Reran the Cocci script to check for unnecessary null
> pointer comparisons before free related functions.
> 
> Stephen Hemminger (3):
>   vdpa/mlx5: remove unnecessary null check
>   raw/ifpga: remove unnecessary null check
>   dmap/dpaa2: remove unnecessary null check
> 
>  drivers/dma/dpaa2/dpaa2_qdma.c      | 6 ++----
>  drivers/raw/ifpga/ifpga_rawdev.c    | 3 +--
>  drivers/vdpa/mlx5/mlx5_vdpa_virtq.c | 3 +--
>  3 files changed, 4 insertions(+), 8 deletions(-)
> 
> -- 

Series-acked-by: Tyler Retzlaff <roretzla@linux.microsoft.com>

Re: [PATCH 0/3] more null pointer check removal

[fengchengwen]

Series-reviewed-by: Chengwen Feng <fengchengwen@huawei.com>

On 2022/6/23 2:51, Stephen Hemminger wrote:
> Reran the Cocci script to check for unnecessary null
> pointer comparisons before free related functions.
> 
> Stephen Hemminger (3):
>   vdpa/mlx5: remove unnecessary null check
>   raw/ifpga: remove unnecessary null check
>   dmap/dpaa2: remove unnecessary null check
> 
>  drivers/dma/dpaa2/dpaa2_qdma.c      | 6 ++----
>  drivers/raw/ifpga/ifpga_rawdev.c    | 3 +--
>  drivers/vdpa/mlx5/mlx5_vdpa_virtq.c | 3 +--
>  3 files changed, 4 insertions(+), 8 deletions(-)
> 

Re: [PATCH 0/3] more null pointer check removal

[David Marchand]

On Wed, Jun 22, 2022 at 8:52 PM Stephen Hemminger
<stephen@networkplumber.org> wrote:
>
> Reran the Cocci script to check for unnecessary null
> pointer comparisons before free related functions.

Applied with series
https://patchwork.dpdk.org/project/dpdk/list/?series=21752&state=*

-- 
David Marchand