Re: [net-next PATCH v6 6/6] octeontx2-pf: AF_XDP zero copy transmit support
From: Paolo Abeni
Date: Tue Feb 18 2025 - 05:29:06 EST
On 2/13/25 6:31 AM, Suman Ghosh wrote:
> +void otx2_zc_napi_handler(struct otx2_nic *pfvf, struct xsk_buff_pool *pool,
> + int queue, int budget)
> +{
> + struct xdp_desc *xdp_desc = pool->tx_descs;
> + int err, i, work_done = 0, batch;
> +
> + budget = min(budget, otx2_read_free_sqe(pfvf, queue));
> + batch = xsk_tx_peek_release_desc_batch(pool, budget);
> + if (!batch)
> + return;
> +
> + for (i = 0; i < batch; i++) {
> + dma_addr_t dma_addr;
> +
> + dma_addr = xsk_buff_raw_get_dma(pool, xdp_desc[i].addr);
> + err = otx2_xdp_sq_append_pkt(pfvf, NULL, dma_addr, xdp_desc[i].len,
> + queue, OTX2_AF_XDP_FRAME);
> + if (!err) {
> + netdev_err(pfvf->netdev, "AF_XDP: Unable to transfer packet err%d\n", err);
Here `err` is always 0, dumping it's value is quite confusing.
The root cause is that otx2_xdp_sq_append_pkt() returns a success
boolean value, the variable holding it should possibly be renamed
accordingly.
Since this is the only nit I could find, I think we are better without a
repost, but please follow-up on this chunk soon.
Thanks,
Paolo