linux-kernel - [PATCH net-next 14/16] net: dsa: sja1105: register switch before assigning port private data

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Date:   Sat, 19 Oct 2019 23:19:39 -0400
From:   Vivien Didelot <vivien.didelot@...il.com>
To:     "David S. Miller" <davem@...emloft.net>
Cc:     linux-kernel@...r.kernel.org,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>, netdev@...r.kernel.org
Subject: [PATCH net-next 14/16] net: dsa: sja1105: register switch before assigning port private data

Like the dsa_switch_tree structures, the dsa_port structures will be
allocated on switch registration.

The SJA1105 driver is the only one accessing the dsa_port structure
after the switch allocation and before the switch registration.
For that reason, move switch registration prior to assigning the priv
member of the dsa_port structures.

Signed-off-by: Vivien Didelot <vivien.didelot@...il.com>
---
 drivers/net/dsa/sja1105/sja1105_main.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index 4b0cb779f187..0ebbda5ca665 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -2057,6 +2057,15 @@ static int sja1105_probe(struct spi_device *spi)
 
 	tagger_data = &priv->tagger_data;
 
+	mutex_init(&priv->ptp_data.lock);
+	mutex_init(&priv->mgmt_lock);
+
+	sja1105_tas_setup(ds);
+
+	rc = dsa_register_switch(priv->ds);
+	if (rc)
+		return rc;
+
 	/* Connections between dsa_port and sja1105_port */
 	for (i = 0; i < SJA1105_NUM_PORTS; i++) {
 		struct sja1105_port *sp = &priv->ports[i];
@@ -2065,12 +2074,8 @@ static int sja1105_probe(struct spi_device *spi)
 		sp->dp = dsa_to_port(ds, i);
 		sp->data = tagger_data;
 	}
-	mutex_init(&priv->ptp_data.lock);
-	mutex_init(&priv->mgmt_lock);
 
-	sja1105_tas_setup(ds);
-
-	return dsa_register_switch(priv->ds);
+	return 0;
 }
 
 static int sja1105_remove(struct spi_device *spi)
-- 
2.23.0