In order to preserve comparisons of the DSA network device bound to the
switch's CPU port, implement net_device::ndo_equal which will return
true while doing net_device_ops pointer comparisons.
Network device drivers might do these checks to reject notifications
targeting a different net_device instance and those could be
non-functional because of the DSA overloading of net_device_ops. No such
cases are known to exist in tree today.
Signed-off-by: Florian Fainelli <f.faine...@gmail.com>
---
net/dsa/master.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/net/dsa/master.c b/net/dsa/master.c
index 480a61460c23..1c4f0736426e 100644
--- a/net/dsa/master.c
+++ b/net/dsa/master.c
@@ -226,6 +226,14 @@ static int dsa_master_ioctl(struct net_device *dev, struct
ifreq *ifr, int cmd)
return err;
}
+static bool dsa_master_equal(struct net_device *dev,
+ const struct net_device_ops *ops)
+{
+ struct dsa_port *cpu_dp = dev->dsa_ptr;
+
+ return cpu_dp->orig_ndo_ops == ops;
+}
+
static int dsa_master_ethtool_setup(struct net_device *dev)
{
struct dsa_port *cpu_dp = dev->dsa_ptr;
@@ -279,6 +287,7 @@ static int dsa_master_ndo_setup(struct net_device *dev)
ops->ndo_get_phys_port_name = dsa_master_get_phys_port_name;
ops->ndo_do_ioctl = dsa_master_ioctl;
+ ops->ndo_equal = dsa_master_equal;
dev->netdev_ops = ops;
--
2.25.1
