On Tue, May 30, 2017 at 10:21:31AM -0400, Vivien Didelot wrote:

The taggers are currently responsible to free the original SKB if they
made a copy of it, or in case of error.

This patch simplifies this by freeing the original SKB in the
dsa_slave_xmit caller if it differs from the return SKB (copy or NULL.)

So we have two different things here:

1) The tagger needs to drop the frame, because there is an error of
some sort.

2) The tagger allocates a new skb for the frame.

I think on error, the core code can drop the frame.

If the tagger allocates a new skb, i think the tagger should be
responsible for freeing to original.

	    Andrew