path: root/examples/vm_power_manager
diff options
authorThomas Monjalon <>2018-04-05 17:33:21 +0200
committerThomas Monjalon <>2018-04-18 00:37:05 +0200
commita9dbe180222680edf8c49e86791f972549ce5be3 (patch)
tree24de43bfe7364653ede899a7e2a391a1c7bd65b9 /examples/vm_power_manager
parent8728ccf37615904cf23fb8763895b05c9a3c6b0c (diff)
fix ethdev port id validation
Some DPDK applications wrongly assume these requirements: - no hotplug, i.e. ports are never detached - all allocated ports are available to the application Such application assume a valid port index is in the range [0..count[. There are three consequences when using such wrong design: - new ports having an index higher than the port count won't be valid - old ports being detached (RTE_ETH_DEV_UNUSED) can be valid Such mistake will be less common with growing hotplug awareness. All applications and examples inside this repository - except testpmd - must be fixed to use the function rte_eth_dev_is_valid_port. Signed-off-by: Thomas Monjalon <>
Diffstat (limited to 'examples/vm_power_manager')
1 files changed, 1 insertions, 1 deletions
diff --git a/examples/vm_power_manager/main.c b/examples/vm_power_manager/main.c
index 4cde828..db0ddb0 100644
--- a/examples/vm_power_manager/main.c
+++ b/examples/vm_power_manager/main.c
@@ -61,7 +61,7 @@ port_init(uint16_t port, struct rte_mempool *mbuf_pool)
struct rte_eth_dev_info dev_info;
struct rte_eth_txconf txq_conf;
- if (port >= rte_eth_dev_count())
+ if (!rte_eth_dev_is_valid_port(port))
return -1;
rte_eth_dev_info_get(port, &dev_info);