[PATCH v3 01/30] baseband/acc100: fix ring availability calculation

[Maxime Coquelin]

Hi Hernan,

On 10/12/22 04:53, Hernan Vargas wrote:
> Refactor of the queue availability computation to prevent the
> application to dequeue more than what may have been enqueued.
> 
> Fixes: 5ad5060f8f7 ("baseband/acc100: add LDPC processing functions")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Hernan Vargas <hernan.vargas at intel.com>
> ---
>   drivers/baseband/acc/rte_acc100_pmd.c | 25 +++++++++++++------------
>   1 file changed, 13 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/baseband/acc/rte_acc100_pmd.c b/drivers/baseband/acc/rte_acc100_pmd.c
> index e84d9f2511..733766ad3e 100644
> --- a/drivers/baseband/acc/rte_acc100_pmd.c
> +++ b/drivers/baseband/acc/rte_acc100_pmd.c
> @@ -2876,7 +2876,7 @@ acc100_enqueue_enc_cb(struct rte_bbdev_queue_data *q_data,
>   		struct rte_bbdev_enc_op **ops, uint16_t num)
>   {
>   	struct acc_queue *q = q_data->queue_private;
> -	int32_t avail = q->sw_ring_depth + q->sw_ring_tail - q->sw_ring_head;
> +	int32_t avail = acc_ring_avail_enq(q);

That's problematic because the patch introducing acc_ring_avail_enq() is
a feature patch for v22.11 and not a fix. You'll have to help the LTS
maintainers to backport it.

Other than that:
Reviewed-by: Maxime Coquelin <maxime.coquelin at redhat.com>

Thanks,
Maxime