Re: [PATCH v3 06/30] baseband/acc100: check for unlikely operation vals

[Maxime Coquelin <maxime.coquelin@redhat.com>]

On 10/12/22 04:53, Hernan Vargas wrote:
> Add unlikely checks for NULL operation values.
> 
> Fixes: f404dfe35cc ("baseband/acc100: support 4G processing")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Hernan Vargas <hernan.vargas@intel.com>
> 
> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> ---
>   drivers/baseband/acc/rte_acc100_pmd.c | 10 ++++++++++
>   1 file changed, 10 insertions(+)
> 
> diff --git a/drivers/baseband/acc/rte_acc100_pmd.c b/drivers/baseband/acc/rte_acc100_pmd.c
> index 3a008a3b88..5e8ed78559 100644
> --- a/drivers/baseband/acc/rte_acc100_pmd.c
> +++ b/drivers/baseband/acc/rte_acc100_pmd.c
> @@ -2184,6 +2184,10 @@ enqueue_enc_one_op_tb(struct acc_queue *q, struct rte_bbdev_enc_op *op,
>   	r = op->turbo_enc.tb_params.r;
>   
>   	while (mbuf_total_left > 0 && r < c) {
> +		if (unlikely(input == 0)) {

This should be a NULL check, as input is a mbuf pointer.

> +			rte_bbdev_log(ERR, "Not enough input segment");
> +			return -EINVAL;
> +		}
>   		seg_total_left = rte_pktmbuf_data_len(input) - in_offset;
>   		/* Set up DMA descriptor */
>   		desc = q->ring_addr + ((q->sw_ring_head + total_enqueued_cbs)
> @@ -3128,6 +3132,8 @@ acc100_enqueue_ldpc_dec_tb(struct rte_bbdev_queue_data *q_data,
>   			break;
>   		enqueued_cbs += ret;
>   	}
> +	if (unlikely(enqueued_cbs == 0))
> +		return 0; /* Nothing to enqueue */
>   
>   	acc_dma_enqueue(q, enqueued_cbs, &q_data->queue_stats);
>   
> @@ -3669,6 +3675,8 @@ acc100_dequeue_dec(struct rte_bbdev_queue_data *q_data,
>   	for (i = 0; i < dequeue_num; ++i) {
>   		op = (q->ring_addr + ((q->sw_ring_tail + dequeued_cbs)
>   			& q->sw_ring_wrap_mask))->req.op_addr;
> +		if (unlikely(op == NULL))
> +			break;
>   		if (op->turbo_dec.code_block_mode == RTE_BBDEV_TRANSPORT_BLOCK)
>   			ret = dequeue_dec_one_op_tb(q, &ops[i], dequeued_cbs,
>   					&aq_dequeued);
> @@ -3714,6 +3722,8 @@ acc100_dequeue_ldpc_dec(struct rte_bbdev_queue_data *q_data,
>   	for (i = 0; i < dequeue_num; ++i) {
>   		op = (q->ring_addr + ((q->sw_ring_tail + dequeued_cbs)
>   			& q->sw_ring_wrap_mask))->req.op_addr;
> +		if (unlikely(op == NULL))
> +			break;
>   		if (op->ldpc_dec.code_block_mode == RTE_BBDEV_TRANSPORT_BLOCK)
>   			ret = dequeue_dec_one_op_tb(q, &ops[i], dequeued_cbs,
>   					&aq_dequeued);