Hi Haoxiang,

Thanks for your work.

On 2025-07-03 18:01:09 +0800, Haoxiang Li wrote:

Add check for the return value of rcar_gen4_ptp_alloc() to prevent potential null pointer dereference.

Fixes: b0d3969d2b4d ("net: ethernet: rtsn: Add support for Renesas Ethernet-TSN") Cc: stable@vger.kernel.org Signed-off-by: Haoxiang Li haoxiang_li2024@163.com

Reviewed-by: Niklas Söderlund niklas.soderlund+renesas@ragnatech.se

---

Changes in v2:

• Add a blank line to make the grouping similar to the

style of other error checks in probe. Thanks, Niklas!

drivers/net/ethernet/renesas/rtsn.c | 5 +++++ 1 file changed, 5 insertions(+)

diff --git a/drivers/net/ethernet/renesas/rtsn.c b/drivers/net/ethernet/renesas/rtsn.c index 6b3f7fca8d15..05c4b6c8c9c3 100644 --- a/drivers/net/ethernet/renesas/rtsn.c +++ b/drivers/net/ethernet/renesas/rtsn.c @@ -1259,7 +1259,12 @@ static int rtsn_probe(struct platform_device *pdev) priv = netdev_priv(ndev); priv->pdev = pdev; priv->ndev = ndev;

• priv->ptp_priv = rcar_gen4_ptp_alloc(pdev);
• if (!priv->ptp_priv) {

• ret = -ENOMEM;
  

• goto error_free;
  

• }

spin_lock_init(&priv->lock); platform_set_drvdata(pdev, priv); -- 2.25.1