From 0e5760440842eee57ff573251e95289e2ee7b15f Mon Sep 17 00:00:00 2001 From: Andrew Lunn Date: Sat, 4 Jun 2016 21:16:52 +0200 Subject: [PATCH] net: dsa: slave: chip data is optional, don't dereference NULL The new binding does not make use of dsa_chip_data, a.k.a cd. When retrieving the size of the EEPROM attached to a switch, don't assume there is a cd attached to the switch structure. Signed-off-by: Andrew Lunn Reviewed-by: Florian Fainelli Reviewed-by: Vivien Didelot Signed-off-by: David S. Miller --- net/dsa/slave.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/dsa/slave.c b/net/dsa/slave.c index 152436cdab30..135a91706755 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -615,7 +615,7 @@ static int dsa_slave_get_eeprom_len(struct net_device *dev) struct dsa_slave_priv *p = netdev_priv(dev); struct dsa_switch *ds = p->parent; - if (ds->cd->eeprom_len) + if (ds->cd && ds->cd->eeprom_len) return ds->cd->eeprom_len; if (ds->drv->get_eeprom_len) -- 2.20.1