[PATCH v2 2/4] net/iavf: fix buffer leak on Tx queue stop

[Lu, Wenzhuo]

> -----Original Message-----
> From: Richardson, Bruce <bruce.richardson at intel.com>
> Sent: Thursday, August 31, 2023 8:34 PM
> To: dev at dpdk.org
> Cc: Richardson, Bruce <bruce.richardson at intel.com>; Lu, Wenzhuo
> <wenzhuo.lu at intel.com>; Wu, Jingjing <jingjing.wu at intel.com>;
> stable at dpdk.org
> Subject: [PATCH v2 2/4] net/iavf: fix buffer leak on Tx queue stop
> 
> When a queue is stopped all buffers are meant to released from it, and then a
> new set of buffers reallocated on start. For the iavf code when using vector Tx,
> some buffers were left in the ring, and so those buffers were leaked. The
> buffers were missed as the release code only handled one side of a
> wrap-around case in the ring.
> 
> Fix the issue by doing a single iteration of the ring freeing all buffers in it,
> handling wraparound through a simple post-increment check.
> 
> Fixes: 319c421f3890 ("net/avf: enable SSE Rx Tx")
> Fixes: 9ab9514c150e ("net/iavf: enable AVX512 for Tx")
> Cc: wenzhuo.lu at intel.com
> Cc: jingjing.wu at intel.com
> Cc: stable at dpdk.org
> 
> Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu at intel.com>