[dpdk-dev] [PATCH v2 1/2] ethdev: add check for device promiscuous state

[Ciara Power <ciara.power@intel.com>]

The promiscuous enable and disable functions now check the
promiscuous state of the device before checking if the dev_ops
function exists for the device.

This change is necessary to allow sample applications run on
virtual PMDs, as previously -ENOTSUP returned when the promiscuous
enable function was called. This caused the sample application to
fail unnecessarily.

Signed-off-by: Ciara Power <ciara.power@intel.com>
---
 lib/librte_ethdev/rte_ethdev.c | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index af823607c..67db0d1dd 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -1930,12 +1930,13 @@ rte_eth_promiscuous_enable(uint16_t port_id)
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
 	dev = &rte_eth_devices[port_id];
 
+	if (dev->data->promiscuous == 1)
+		return 0;
+
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->promiscuous_enable, -ENOTSUP);
 
-	if (dev->data->promiscuous == 0) {
-		diag = (*dev->dev_ops->promiscuous_enable)(dev);
-		dev->data->promiscuous = (diag == 0) ? 1 : 0;
-	}
+	diag = (*dev->dev_ops->promiscuous_enable)(dev);
+	dev->data->promiscuous = (diag == 0) ? 1 : 0;
 
 	return eth_err(port_id, diag);
 }
@@ -1949,14 +1950,15 @@ rte_eth_promiscuous_disable(uint16_t port_id)
 	RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
 	dev = &rte_eth_devices[port_id];
 
+	if (dev->data->promiscuous == 0)
+		return 0;
+
 	RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->promiscuous_disable, -ENOTSUP);
 
-	if (dev->data->promiscuous == 1) {
-		dev->data->promiscuous = 0;
-		diag = (*dev->dev_ops->promiscuous_disable)(dev);
-		if (diag != 0)
-			dev->data->promiscuous = 1;
-	}
+	dev->data->promiscuous = 0;
+	diag = (*dev->dev_ops->promiscuous_disable)(dev);
+	if (diag != 0)
+		dev->data->promiscuous = 1;
 
 	return eth_err(port_id, diag);
 }
-- 
2.17.1