[dpdk-stable] [PATCH 1/2] net/bonding: do not set promisc on non-existent primary port

[Hyong Youb Kim]

For active-backup, tlb, and alb mode,
bond_ethdev_promiscuous_{enable,disable} tries to set promisc mode on
the primary port, even when there are no slaves. It is harmless, as
rte_eth_promiscuous_{enable,disable} does nothing if the port number
is invalid. But, it does print a warning message. Here is an example
from testpmd.

testpmd> create bonded device 5 0
Created new bonded device net_bonding_testpmd_0 on (port 4).
Invalid port_id=33
testpmd> set promisc 4 off
Invalid port_id=33

33 in this case is RTE_MAX_ETHPORTS + 1, the invalid primary port
number used within the bonding driver. This warning message is
harmless but can be confusing to the user. So do not try to set
promisc on a primary port when we know it does not exist (i.e. no
slaves).

Fixes: 2efb58cbab6e ("bond: new link bonding library")
Cc: stable at dpdk.org

Signed-off-by: Hyong Youb Kim <hyonkim at cisco.com>
---
 drivers/net/bonding/rte_eth_bond_pmd.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index 44deaf119..daf2440cd 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -2593,6 +2593,9 @@ bond_ethdev_promiscuous_enable(struct rte_eth_dev *eth_dev)
 	case BONDING_MODE_TLB:
 	case BONDING_MODE_ALB:
 	default:
+		/* Do not touch promisc when there cannot be primary ports */
+		if (internals->slave_count == 0)
+			break;
 		rte_eth_promiscuous_enable(internals->current_primary_port);
 	}
 }
@@ -2621,6 +2624,9 @@ bond_ethdev_promiscuous_disable(struct rte_eth_dev *dev)
 	case BONDING_MODE_TLB:
 	case BONDING_MODE_ALB:
 	default:
+		/* Do not touch promisc when there cannot be primary ports */
+		if (internals->slave_count == 0)
+			break;
 		rte_eth_promiscuous_disable(internals->current_primary_port);
 	}
 }
-- 
2.16.2