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[73.185.129.58]) by smtp.gmail.com with ESMTPSA id p15-20020a6b8d0f000000b0065a47e16f3fsm18217iod.17.2022.05.12.08.10.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 May 2022 08:10:38 -0700 (PDT) From: Alex Elder To: davem@davemloft.net, kuba@kernel.org, pabeni@redhat.com Cc: lkp@intel.com, mka@chromium.org, evgreen@chromium.org, bjorn.andersson@linaro.org, quic_cpratapa@quicinc.com, quic_avuyyuru@quicinc.com, quic_jponduru@quicinc.com, quic_subashab@quicinc.com, elder@kernel.org, netdev@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net 1/3] net: ipa: certain dropped packets aren't accounted for Date: Thu, 12 May 2022 10:10:31 -0500 Message-Id: <20220512151033.211592-2-elder@linaro.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220512151033.211592-1-elder@linaro.org> References: <20220512151033.211592-1-elder@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org If an RX endpoint receives packets containing status headers, and a packet in the buffer is not dropped, ipa_endpoint_skb_copy() is responsible for wrapping the packet data in an SKB and forwarding it to ipa_modem_skb_rx() for further processing. If ipa_endpoint_skb_copy() gets a null pointer from build_skb(), it just returns early. But in the process it doesn't record that as a dropped packet in the network device statistics. Instead, call ipa_modem_skb_rx() whether or not the SKB pointer is NULL; that function ensures the statistics are properly updated. Fixes: 1b65bbcc9a710 ("net: ipa: skip SKB copy if no netdev") Signed-off-by: Alex Elder --- drivers/net/ipa/ipa_endpoint.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-) diff --git a/drivers/net/ipa/ipa_endpoint.c b/drivers/net/ipa/ipa_endpoint.c index 888e94278a84f..cea7b2e2ce969 100644 --- a/drivers/net/ipa/ipa_endpoint.c +++ b/drivers/net/ipa/ipa_endpoint.c @@ -1150,13 +1150,12 @@ static void ipa_endpoint_skb_copy(struct ipa_endpoint *endpoint, return; skb = __dev_alloc_skb(len, GFP_ATOMIC); - if (!skb) - return; - - /* Copy the data into the socket buffer and receive it */ - skb_put(skb, len); - memcpy(skb->data, data, len); - skb->truesize += extra; + if (skb) { + /* Copy the data into the socket buffer and receive it */ + skb_put(skb, len); + memcpy(skb->data, data, len); + skb->truesize += extra; + } ipa_modem_skb_rx(endpoint->netdev, skb); }