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examples/l3fwd-power: fix handling no Rx queue

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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 <jingjing.wu@intel.com>
This commit is contained in:
Jingjing Wu 2017-04-28 18:47:44 +08:00 committed by Thomas Monjalon
parent 935439234b
commit ddc554ad28
1 changed files with 6 additions and 0 deletions
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6
examples/l3fwd-power/main.c
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@ -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);