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dsa: Split ops up, and avoid assigning tag_protocol and receive separately

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This change addresses several issues.

First, it was possible to set tag_protocol without setting the ops pointer.
To correct that I have reordered things so that rcv is now populated before
we set tag_protocol.

Second, it didn't make much sense to keep setting the device ops each time a
new slave was registered.  So by moving the receive portion out into root
switch initialization that issue should be addressed.

Third, I wanted to avoid sending tags if the rcv pointer was not registered
so I changed the tag check to verify if the rcv function pointer is set on
the root tree.  If it is then we start sending DSA tagged frames.

Finally I split the device ops pointer in the structures into two spots.  I
placed the rcv function pointer in the root switch since this makes it
easiest to access from there, and I placed the xmit function pointer in the
slave for the same reason.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck
2014-09-15 13:00:19 -04:00
committed by David S. Miller
parent 6cca9adb78
commit 5075314e4e
9 changed files with 71 additions and 54 deletions
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11
net/dsa/dsa_priv.h
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@@ -12,7 +12,13 @@
#define __DSA_PRIV_H
#include <linux/phy.h>
#include <net/dsa.h>
#include <linux/netdevice.h>
struct dsa_device_ops {
netdev_tx_t (*xmit)(struct sk_buff *skb, struct net_device *dev);
int (*rcv)(struct sk_buff *skb, struct net_device *dev,
struct packet_type *pt, struct net_device *orig_dev);
};
struct dsa_slave_priv {
/*
@@ -20,6 +26,8 @@ struct dsa_slave_priv {
* switch port.
*/
struct net_device *dev;
netdev_tx_t (*xmit)(struct sk_buff *skb,
struct net_device *dev);
/*
* Which switch this port is a part of, and the port index
@@ -43,6 +51,7 @@ struct dsa_slave_priv {
extern char dsa_driver_version[];
/* slave.c */
extern const struct dsa_device_ops notag_netdev_ops;
void dsa_slave_mii_bus_init(struct dsa_switch *ds);
struct net_device *dsa_slave_create(struct dsa_switch *ds,
struct device *parent,