[dpdk-dev] [PATCH v3 1/2] ethdev: fix device info getting

[Wenzhuo Lu <wenzhuo.lu@intel.com>]

The device information cannot be gotten correctly before
the configuration is set. Because on some NICs the
information has dependence on the configuration.

Fixes: 3be82f5cc5e3 ("ethdev: support PMD-tuned Tx/Rx parameters")
Signed-off-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
---
 lib/librte_ethdev/rte_ethdev.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 8eaa5fc..f181c21 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -1102,6 +1102,17 @@ struct rte_eth_dev *
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_infos_get, -ENOTSUP);
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->dev_configure, -ENOTSUP);
 
+	if (dev->data->dev_started) {
+		RTE_ETHDEV_LOG(ERR,
+			"Port %u must be stopped to allow configuration\n",
+			port_id);
+		return -EBUSY;
+	}
+
+	/* Copy the dev_conf parameter into the dev structure,
+	 * then get the info.
+	 */
+	memcpy(&dev->data->dev_conf, &local_conf, sizeof(dev->data->dev_conf));
 	rte_eth_dev_info_get(port_id, &dev_info);
 
 	/* If number of queues specified by application for both Rx and Tx is
@@ -1133,16 +1144,6 @@ struct rte_eth_dev *
 		return -EINVAL;
 	}
 
-	if (dev->data->dev_started) {
-		RTE_ETHDEV_LOG(ERR,
-			"Port %u must be stopped to allow configuration\n",
-			port_id);
-		return -EBUSY;
-	}
-
-	/* Copy the dev_conf parameter into the dev structure */
-	memcpy(&dev->data->dev_conf, &local_conf, sizeof(dev->data->dev_conf));
-
 	/*
 	 * Check that the numbers of RX and TX queues are not greater
 	 * than the maximum number of RX and TX queues supported by the
-- 
1.9.3