netdev - [RFC PATCH v3 net-next 04/10] net: dsa: ocelot: felix: Remove requirement for PCS in felix devices

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Date:   Fri, 13 Aug 2021 19:49:57 -0700
From:   Colin Foster <colin.foster@...advantage.com>
To:     colin.foster@...advantage.com, 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, hkallweit1@...il.com,
        linux@...linux.org.uk
Cc:     netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [RFC PATCH v3 net-next 04/10] net: dsa: ocelot: felix: Remove requirement for PCS in felix devices

Existing felix devices all have an initialized pcs array. Future devices
might not, so running a NULL check on the array before dereferencing it
will allow those future drivers to not crash at this point

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