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net: dsa: split dsa_port's netdev member

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The dsa_port structure has a "netdev" member, which can be used for
either the master device, or the slave device, depending on its type.

It is true that today, CPU port are not exposed to userspace, thus the
port's netdev member can be used to point to its master interface.

But it is still slightly confusing, so split it into more explicit
"master" and "slave" members inside an anonymous union.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2017-10-16 11:12:18 -04:00 • committed by David S. Miller
parent 2231c43b56
commit f8b8b1cd5a
9 changed files with 38 additions and 31 deletions
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9
include/net/dsa.h
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@ -164,6 +164,14 @@ struct dsa_mall_tc_entry {
struct dsa_port {
/* A CPU port is physically connected to a master device.
* A user port exposed to userspace has a slave device.
*/
union {
struct net_device *master;
struct net_device *slave;
};
/* CPU port tagging operations used by master or slave devices */
const struct dsa_device_ops *tag_ops;
@ -176,7 +184,6 @@ struct dsa_port {
unsigned int index;
const char *name;
struct dsa_port *cpu_dp;
struct net_device *netdev;
struct device_node *dn;
unsigned int ageing_time;
u8 stp_state;