From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id ACCBBA0093; Mon, 18 May 2020 11:27:39 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id DC1921D515; Mon, 18 May 2020 11:27:38 +0200 (CEST) Received: from git-send-mailer.rdmz.labs.mlnx (unknown [37.142.13.130]) by dpdk.org (Postfix) with ESMTP id D683A1D16B for ; Mon, 18 May 2020 11:27:37 +0200 (CEST) From: Shy Shyman To: dev@dpdk.org Cc: Wenzhuo Lu , Beilei Xing , Bernard Iremonger , xavier.huwei@huawei.com Date: Mon, 18 May 2020 12:27:04 +0300 Message-Id: <20200518092704.188832-1-shys@mellanox.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [dpdk-dev] [PATCH] app/testpmd: fix error detection in MTU command X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" MTU is used in testpmd to set the maximum payload size for packets. According to testpmd, the setting influnce RX only. In rte_ethdev there's no relation between MTU setting and JUMBO offload or rx_max_pkt_len. The previous fix in patch referenced below was meant to update the correlated variables of max_pkt_len and JUMBO offload, but by doing so it assumes that MTU setting can only exist when JUMBO offload supported in the device. For example fail-safe device does supports set MTU and doesn't support JUMBO offload, and in this case, though set MTU succeed an error mesage still printed since the JUMBO packet offload is disabled. The fix separates the two conditions to make sure the error triggers only in case the set_mtu action actually failed. A warning message is provided in this special case to alert the user. Fixes: 150c9ac2df13 ("app/testpmd: update Rx offload after setting MTU") Cc: xavier.huwei@huawei.com Signed-off-by: Shy Shyman --- app/test-pmd/config.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c index 5381207cc..73b53c50b 100644 --- a/app/test-pmd/config.c +++ b/app/test-pmd/config.c @@ -1277,8 +1277,9 @@ port_mtu_set(portid_t port_id, uint16_t mtu) return; } diag = rte_eth_dev_set_mtu(port_id, mtu); - if (diag == 0 && - dev_info.rx_offload_capa & DEV_RX_OFFLOAD_JUMBO_FRAME) { + if (diag) + printf("Set MTU failed. diag=%d\n", diag); + else if (dev_info.rx_offload_capa & DEV_RX_OFFLOAD_JUMBO_FRAME) { /* * Ether overhead in driver is equal to the difference of * max_rx_pktlen and max_mtu in rte_eth_dev_info when the @@ -1293,10 +1294,9 @@ port_mtu_set(portid_t port_id, uint16_t mtu) } else rte_port->dev_conf.rxmode.offloads &= ~DEV_RX_OFFLOAD_JUMBO_FRAME; - - return; - } - printf("Set MTU failed. diag=%d\n", diag); + } else + printf("WARNING: MTU was set while jumbo frame offload is" + " not supported by the device\n"); } /* Generic flow management functions. */ -- 2.21.0