[dpdk-dev] [RFC 05/14] dpaa2: use rte_eth_link_update

[Stephen Hemminger <stephen@networkplumber.org>]

Use new helper function to update the link status.
As a good side effect this fixes a but because this driver was not
returning correct status (should be -1 in link_status changed).

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
---
 drivers/net/dpaa2/dpaa2_ethdev.c | 66 +++++-----------------------------------
 1 file changed, 8 insertions(+), 58 deletions(-)

diff --git a/drivers/net/dpaa2/dpaa2_ethdev.c b/drivers/net/dpaa2/dpaa2_ethdev.c
index 44a5bc2bdb3d..80ce1c5ef8cb 100644
--- a/drivers/net/dpaa2/dpaa2_ethdev.c
+++ b/drivers/net/dpaa2/dpaa2_ethdev.c
@@ -59,58 +59,6 @@ static int dpaa2_dev_set_link_up(struct rte_eth_dev *dev);
 static int dpaa2_dev_set_link_down(struct rte_eth_dev *dev);
 static int dpaa2_dev_mtu_set(struct rte_eth_dev *dev, uint16_t mtu);
 
-/**
- * Atomically reads the link status information from global
- * structure rte_eth_dev.
- *
- * @param dev
- *   - Pointer to the structure rte_eth_dev to read from.
- *   - Pointer to the buffer to be saved with the link status.
- *
- * @return
- *   - On success, zero.
- *   - On failure, negative value.
- */
-static inline int
-dpaa2_dev_atomic_read_link_status(struct rte_eth_dev *dev,
-				  struct rte_eth_link *link)
-{
-	struct rte_eth_link *dst = link;
-	struct rte_eth_link *src = &dev->data->dev_link;
-
-	if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
-				*(uint64_t *)src) == 0)
-		return -1;
-
-	return 0;
-}
-
-/**
- * Atomically writes the link status information into global
- * structure rte_eth_dev.
- *
- * @param dev
- *   - Pointer to the structure rte_eth_dev to read from.
- *   - Pointer to the buffer to be saved with the link status.
- *
- * @return
- *   - On success, zero.
- *   - On failure, negative value.
- */
-static inline int
-dpaa2_dev_atomic_write_link_status(struct rte_eth_dev *dev,
-				   struct rte_eth_link *link)
-{
-	struct rte_eth_link *dst = &dev->data->dev_link;
-	struct rte_eth_link *src = link;
-
-	if (rte_atomic64_cmpset((uint64_t *)dst, *(uint64_t *)dst,
-				*(uint64_t *)src) == 0)
-		return -1;
-
-	return 0;
-}
-
 static int
 dpaa2_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
 {
@@ -675,7 +623,7 @@ dpaa2_dev_stop(struct rte_eth_dev *dev)
 
 	/* clear the recorded link status */
 	memset(&link, 0, sizeof(link));
-	dpaa2_dev_atomic_write_link_status(dev, &link);
+	_rte_eth_link_write(dev, &link);
 }
 
 static void
@@ -707,7 +655,7 @@ dpaa2_dev_close(struct rte_eth_dev *dev)
 	}
 
 	memset(&link, 0, sizeof(link));
-	dpaa2_dev_atomic_write_link_status(dev, &link);
+	_rte_eth_link_write(dev, &link);
 }
 
 static void
@@ -1021,8 +969,8 @@ dpaa2_dev_link_update(struct rte_eth_dev *dev,
 		RTE_LOG(ERR, PMD, "dpni is NULL\n");
 		return 0;
 	}
-	memset(&old, 0, sizeof(old));
-	dpaa2_dev_atomic_read_link_status(dev, &old);
+
+	_rte_eth_link_read(dev, &old);
 
 	ret = dpni_get_link_state(dpni, CMD_PRI_LOW, priv->token, &state);
 	if (ret < 0) {
@@ -1044,13 +992,15 @@ dpaa2_dev_link_update(struct rte_eth_dev *dev,
 	else
 		link.link_duplex = ETH_LINK_FULL_DUPLEX;
 
-	dpaa2_dev_atomic_write_link_status(dev, &link);
+	_rte_eth_link_write(dev, &link);
 
 	if (link.link_status)
 		PMD_DRV_LOG(INFO, "Port %d Link is Up\n", dev->data->port_id);
 	else
 		PMD_DRV_LOG(INFO, "Port %d Link is Down\n", dev->data->port_id);
-	return 0;
+
+
+	return (old.link_status == link.link_status) ? -1 : 0;
 }
 
 /**
-- 
2.11.0