linux-kernel - [PATCH net-next 1/1] net: pcs: xpcs: fix error handling on failed to allocate memory

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Date:   Tue, 10 Aug 2021 16:58:12 +0800
From:   Wong Vee Khee <vee.khee.wong@...ux.intel.com>
To:     Jose Abreu <Jose.Abreu@...opsys.com>, Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: [PATCH net-next 1/1] net: pcs: xpcs: fix error handling on failed to allocate memory

Drivers such as sja1105 and stmmac that call xpcs_create() expects an
error returned by the pcs-xpcs module, but this was not the case on
failed to allocate memory.

Fixed this by returning an -ENOMEM instead of a NULL pointer.

Cc: Vladimir Oltean <vladimir.oltean@....com>
Signed-off-by: Wong Vee Khee <vee.khee.wong@...ux.intel.com>
---
 drivers/net/pcs/pcs-xpcs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/pcs/pcs-xpcs.c b/drivers/net/pcs/pcs-xpcs.c
index 63fda3fc40aa..4bd61339823c 100644
--- a/drivers/net/pcs/pcs-xpcs.c
+++ b/drivers/net/pcs/pcs-xpcs.c
@@ -1089,7 +1089,7 @@ struct dw_xpcs *xpcs_create(struct mdio_device *mdiodev,
 
 	xpcs = kzalloc(sizeof(*xpcs), GFP_KERNEL);
 	if (!xpcs)
-		return NULL;
+		return ERR_PTR(-ENOMEM);
 
 	xpcs->mdiodev = mdiodev;
 
-- 
2.25.1