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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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10
include/net/dsa.h
View file

@ -77,7 +77,7 @@ struct dsa_platform_data {
struct dsa_chip_data *chip;
};
struct dsa_device_ops;
struct packet_type;
struct dsa_switch_tree {
/*
@ -91,7 +91,10 @@ struct dsa_switch_tree {
* protocol to use.
*/
struct net_device *master_netdev;
const struct dsa_device_ops *ops;
int (*rcv)(struct sk_buff *skb,
struct net_device *dev,
struct packet_type *pt,
struct net_device *orig_dev);
enum dsa_tag_protocol tag_protocol;
/*
@ -218,7 +221,6 @@ static inline void *ds_to_priv(struct dsa_switch *ds)
static inline bool dsa_uses_tagged_protocol(struct dsa_switch_tree *dst)
{
return dst->tag_protocol != DSA_TAG_PROTO_NONE;
return dst->rcv != NULL;
}
#endif