Re: [PATCH net-next v6 02/10] dpaa_eth: add support for DPAA Ethernet

[David Miller]

From: Madalin-Cristian Bucur <madalin.bucur@xxxxxxx>
Date: Mon, 7 Nov 2016 15:43:26 +0000

>> From: David Miller [mailto:davem@xxxxxxxxxxxxx]
>> Sent: Thursday, November 03, 2016 9:58 PM
>> 
>> Why?  By clearing this, you disallow an important fundamental way to do
>> performane testing, via pktgen.
> 
> The Tx path in DPAA requires one to insert a back-pointer to the skb into
> the Tx buffer. On the Tx confirmation path the back-pointer in the buffer
> is used to release the skb. If Tx buffer is shared we'd alter the back-pointer
> and leak/double free skbs. See also 

Then have your software state store an array of SKB pointers, one for each
TX ring entry, just like every other driver does.