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From: Florian Fainelli <f.fainelli@gmail.com>
To: netdev@vger.kernel.org
Cc: davem@davemloft.net, andrew@lunn.ch, vivien.didelot@gmail.com,
	Florian Fainelli <f.fainelli@gmail.com>
Subject: [PATCH net 4/5] net: dsa: bcm_sf2: Do not assume DSA master supports WoL
Date: Fri, 15 Feb 2019 12:16:52 -0800	[thread overview]
Message-ID: <20190215201653.20988-5-f.fainelli@gmail.com> (raw)
In-Reply-To: <20190215201653.20988-1-f.fainelli@gmail.com>

We assume in the bcm_sf2 driver that the DSA master network device
supports ethtool_ops::{get,set}_wol operations, which is not a given.
Avoid de-referencing potentially non-existent function pointers and
check them as we should.

Fixes: 96e65d7f3f88 ("net: dsa: bcm_sf2: add support for Wake-on-LAN")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 drivers/net/dsa/bcm_sf2.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 17ec32b0a1cc..14138d423cf1 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -726,10 +726,11 @@ static void bcm_sf2_sw_get_wol(struct dsa_switch *ds, int port,
 {
 	struct net_device *p = ds->ports[port].cpu_dp->master;
 	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
-	struct ethtool_wolinfo pwol;
+	struct ethtool_wolinfo pwol = { };
 
 	/* Get the parent device WoL settings */
-	p->ethtool_ops->get_wol(p, &pwol);
+	if (p->ethtool_ops->get_wol)
+		p->ethtool_ops->get_wol(p, &pwol);
 
 	/* Advertise the parent device supported settings */
 	wol->supported = pwol.supported;
@@ -750,9 +751,10 @@ static int bcm_sf2_sw_set_wol(struct dsa_switch *ds, int port,
 	struct net_device *p = ds->ports[port].cpu_dp->master;
 	struct bcm_sf2_priv *priv = bcm_sf2_to_priv(ds);
 	s8 cpu_port = ds->ports[port].cpu_dp->index;
-	struct ethtool_wolinfo pwol;
+	struct ethtool_wolinfo pwol =  { };
 
-	p->ethtool_ops->get_wol(p, &pwol);
+	if (p->ethtool_ops->get_wol)
+		p->ethtool_ops->get_wol(p, &pwol);
 	if (wol->wolopts & ~pwol.supported)
 		return -EINVAL;
 
-- 
2.17.1


  parent reply	other threads:[~2019-02-15 20:17 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-15 20:16 [PATCH net 0/5] net: dsa: b53: VLAN and L2 fixes Florian Fainelli
2019-02-15 20:16 ` [PATCH net 1/5] net: dsa: b53: Fix default VLAN ID Florian Fainelli
2019-02-15 20:16 ` [PATCH net 2/5] net: dsa: b53: Properly account for VLAN filtering Florian Fainelli
2019-02-15 20:16 ` [PATCH net 3/5] net: systemport: Fix reception of BPDUs Florian Fainelli
2019-02-15 20:16 ` Florian Fainelli [this message]
2019-02-15 20:16 ` [PATCH net 5/5] net: dsa: b53: Do not program CPU port's PVID Florian Fainelli
2019-02-16  4:38 ` [PATCH net 0/5] net: dsa: b53: VLAN and L2 fixes David Miller

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