[dpdk-dev] [PATCH v2] net/bond: change link status check to no-wait

[Declan Doherty]

In 2 modes (802.3ad and TLB) of the link bonding driver, monitoring of
link status is used to determine the active slaves to use. These
functions are currently using the rte_link_link_get which could block
for up to 9 seconds, depending on the slave device.

In the 802.3ad periodic callback and in the TLB slave callback the
link status of slaves are checked using rte_eth_link_get function.

This patch changes to the no-wait version of the link get function to
avoid the possible issues which could be introduced if this call was
to block for an extended period of time.

Fixes: 46fb4368 ("bond:add mode 4")
Fixes: 7c76a747 ("bond:add mode 5")

Signed-off-by: Declan Doherty <declan.doherty at intel.com>
---
 drivers/net/bonding/rte_eth_bond_8023ad.c | 2 +-
 drivers/net/bonding/rte_eth_bond_pmd.c    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bonding/rte_eth_bond_8023ad.c b/drivers/net/bonding/rte_eth_bond_8023ad.c
index d2b7592..3a97336 100644
--- a/drivers/net/bonding/rte_eth_bond_8023ad.c
+++ b/drivers/net/bonding/rte_eth_bond_8023ad.c
@@ -758,7 +758,7 @@ bond_mode_8023ad_periodic_cb(void *arg)
 		uint16_t key;
 
 		slave_id = internals->active_slaves[i];
-		rte_eth_link_get(slave_id, &link_info);
+		rte_eth_link_get_nowait(slave_id, &link_info);
 		rte_eth_macaddr_get(slave_id, &slave_addr);
 
 		if (link_info.link_status != 0) {
diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index a8d9780..eff2a66 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -654,7 +654,7 @@ bandwidth_left(uint8_t port_id, uint64_t load, uint8_t update_idx,
 {
 	struct rte_eth_link link_status;
 
-	rte_eth_link_get(port_id, &link_status);
+	rte_eth_link_get_nowait(port_id, &link_status);
 	uint64_t link_bwg = link_status.link_speed * 1000000ULL / 8;
 	if (link_bwg == 0)
 		return;
-- 
2.9.4