The function of_parse_phandle() returns a NULL pointer if it cannot resolve a phandle property to a device_node pointer. In function hns_nic_dev_probe(), its return value is passed to PTR_ERR to extract the error code. However, in this case, the extracted error code will always be zero, which is unexpected.
Signed-off-by: Pan Bian <bianpan2...@163.com> --- drivers/net/ethernet/hisilicon/hns/hns_enet.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c index 3652063..e771926 100644 --- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c +++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c @@ -2369,8 +2369,8 @@ static int hns_nic_dev_probe(struct platform_device *pdev) priv->enet_ver = AE_VERSION_2; ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0); - if (IS_ERR_OR_NULL(ae_node)) { - ret = PTR_ERR(ae_node); + if (!ae_node) { + ret = -ENODEV; dev_err(dev, "not find ae-handle\n"); goto out_read_prop_fail; } -- 1.9.1