From ddc554ad284eed63d6333c28d06b6b0b8e8e75d3 Mon Sep 17 00:00:00 2001 From: Jingjing Wu Date: Fri, 28 Apr 2017 18:47:44 +0800 Subject: [PATCH] examples/l3fwd-power: fix handling no Rx queue If the number of rx queues is zero, it is meaningless to enable rx interrupt. This patch fixes it. Fixes: aee3bc79cc34 ("examples/l3fwd-power: enable one-shot Rx interrupt and polling switch") Cc: stable@dpdk.org Signed-off-by: Jingjing Wu --- examples/l3fwd-power/main.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c index ec40a1732f..57636e9f47 100644 --- a/examples/l3fwd-power/main.c +++ b/examples/l3fwd-power/main.c @@ -1654,6 +1654,7 @@ main(int argc, char **argv) uint32_t n_tx_queue, nb_lcores; uint32_t dev_rxq_num, dev_txq_num; uint8_t portid, nb_rx_queue, queue, socketid; + uint16_t org_rxq_intr = port_conf.intr_conf.rxq; /* catch SIGINT and restore cpufreq governor to ondemand */ signal(SIGINT, signal_exit_now); @@ -1714,8 +1715,13 @@ main(int argc, char **argv) n_tx_queue = dev_txq_num; printf("Creating queues: nb_rxq=%d nb_txq=%u... ", nb_rx_queue, (unsigned)n_tx_queue ); + /* If number of Rx queue is 0, no need to enable Rx interrupt */ + if (nb_rx_queue == 0) + port_conf.intr_conf.rxq = 0; ret = rte_eth_dev_configure(portid, nb_rx_queue, (uint16_t)n_tx_queue, &port_conf); + /* Revert to original value */ + port_conf.intr_conf.rxq = org_rxq_intr; if (ret < 0) rte_exit(EXIT_FAILURE, "Cannot configure device: " "err=%d, port=%d\n", ret, portid); -- 2.20.1