linux-kernel - [RFC PATCH v2 net-next 3/8] net: dsa: ocelot: felix: NULL check on variable

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Message-Id: <20210710192602.2186370-4-colin.foster@in-advantage.com>
Date:   Sat, 10 Jul 2021 12:25:57 -0700
From:   Colin Foster <colin.foster@...advantage.com>
To:     andrew@...n.ch, vivien.didelot@...il.com, f.fainelli@...il.com,
        olteanv@...il.com, davem@...emloft.net, kuba@...nel.org,
        robh+dt@...nel.org, claudiu.manoil@....com,
        alexandre.belloni@...tlin.com, UNGLinuxDriver@...rochip.com,
        linux@...linux.org.uk
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH v2 net-next 3/8] net: dsa: ocelot: felix: NULL check on variable

Add NULL check before dereferencing array

Signed-off-by: Colin Foster <colin.foster@...advantage.com>
---
 drivers/net/dsa/ocelot/felix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index ce607fbaaa3a..74ae322b2126 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -852,7 +852,7 @@ static void felix_phylink_mac_config(struct dsa_switch *ds, int port,
 	struct felix *felix = ocelot_to_felix(ocelot);
 	struct dsa_port *dp = dsa_to_port(ds, port);
 
-	if (felix->pcs[port])
+	if (felix->pcs && felix->pcs[port])
 		phylink_set_pcs(dp->pl, &felix->pcs[port]->pcs);
 }
 
-- 
2.25.1