[dpdk-dev] [PATCH] ethdev: avoid usage of uninit device info in bad port case

Andrew Rybchenko arybchenko at solarflare.com
Tue Jul 23 11:13:28 CEST 2019


rte_eth_dev_info_get() returns void and caller does know if the function
does its job or not. Changing of the return value to int would be
API/ABI breakage which requires deprecation process and cannot be
backported to stable branches. For now, make sure that device info is
initialized even in the case of invalid port ID.

Fixes: a30268e9a2d0 ("ethdev: reset whole dev info structure before filling")
Cc: stable at dpdk.org

Signed-off-by: Andrew Rybchenko <arybchenko at solarflare.com>
---
 lib/librte_ethdev/rte_ethdev.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 64191737c..97b093edc 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -2552,10 +2552,11 @@ rte_eth_dev_info_get(uint16_t port_id, struct rte_eth_dev_info *dev_info)
 		.nb_mtu_seg_max = UINT16_MAX,
 	};
 
+	memset(dev_info, 0, sizeof(struct rte_eth_dev_info));
+
 	RTE_ETH_VALID_PORTID_OR_RET(port_id);
 	dev = &rte_eth_devices[port_id];
 
-	memset(dev_info, 0, sizeof(struct rte_eth_dev_info));
 	dev_info->rx_desc_lim = lim;
 	dev_info->tx_desc_lim = lim;
 	dev_info->device = dev->device;
-- 
2.17.1



More information about the dev mailing list