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[146.241.89.107]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-43982bcc607sm58367795e9.16.2025.02.18.02.26.22 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 18 Feb 2025 02:26:23 -0800 (PST) Message-ID: <1ff73b64-2745-473d-a12d-87e1501262d5@redhat.com> Date: Tue, 18 Feb 2025 11:26:21 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [net-next PATCH v6 6/6] octeontx2-pf: AF_XDP zero copy transmit support To: Suman Ghosh , horms@kernel.org, sgoutham@marvell.com, gakula@marvell.com, sbhatta@marvell.com, hkelam@marvell.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, lcherian@marvell.com, jerinj@marvell.com, john.fastabend@gmail.com, bbhushan2@marvell.com, hawk@kernel.org, andrew+netdev@lunn.ch, ast@kernel.org, daniel@iogearbox.net, bpf@vger.kernel.org, larysa.zaremba@intel.com References: <20250213053141.2833254-1-sumang@marvell.com> <20250213053141.2833254-7-sumang@marvell.com> Content-Language: en-US From: Paolo Abeni In-Reply-To: <20250213053141.2833254-7-sumang@marvell.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit 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