# \[PATCH AUTOSEL 5.15 12/29\] net: bcmgenet: Fix NULL vs IS\_ERR() checking

- From: Sasha Levin \<sashal@kernel.org\>
- Date: 2021-12-21 01:58:21 
- List: netdev
- Page: https://ratatoskr.run/netdev/2021/12/1614967
- Thread: https://ratatoskr.run/stable/2021/12/1614958/t.md

```text
From: Miaoqian Lin <redacted>

[ Upstream commit ab8eb798ddabddb2944401bf31ead9671cb97d95 ]

The phy_attach() function does not return NULL. It returns error pointers.

Signed-off-by: Miaoqian Lin <redacted>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/broadcom/genet/bcmmii.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c
index 89d16c587bb7d..50ea9401f123d 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -557,9 +557,9 @@ static int bcmgenet_mii_pd_init(struct bcmgenet_priv *priv)
 		 * Internal or external PHY with MDIO access
 		 */
 		phydev = phy_attach(priv->dev, phy_name, pd->phy_interface);
-		if (!phydev) {
+		if (IS_ERR(phydev)) {
 			dev_err(kdev, "failed to register PHY device\n");
-			return -ENODEV;
+			return PTR_ERR(phydev);
 		}
 	} else {
 		/*
-- 
2.34.1

```