diff mbox

[dpdk-dev,v2] net/i40e: fix link status update

Message ID 20180530082634.33843-1-roy.fan.zhang@intel.com (mailing list archive)
State Superseded, archived
Delegated to: Thomas Monjalon
Headers

Checks

Context Check Description
ci/checkpatch success coding style OK
ci/Intel-compilation success Compilation OK

Commit Message

Fan Zhang May 30, 2018, 8:26 a.m. UTC 
  This patch fixes link status update problem in interrupt mode.
Previously, directly reading link status register instead of
accessing via admin queue command may cause the link status
change interrupt callback inactive. This patch fixes the
problem by making the driver only read the register in
"no wait" and polling mode.

Bugzilla ID 54, link https://dpdk.org/tracker/show_bug.cgi?id=54

Fixes: eef2daf2e199 ("net/i40e: fix link update no wait")
Cc: stable@dpdk.org

Signed-off-by: Fan Zhang <roy.fan.zhang@intel.com>
---
 drivers/net/i40e/i40e_ethdev.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)
diff mbox

Patch

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 7d4f1c9da..13c5d3296 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -2522,7 +2522,7 @@  i40e_dev_set_link_down(struct rte_eth_dev *dev)
 }
 
 static __rte_always_inline void
-update_link_no_wait(struct i40e_hw *hw, struct rte_eth_link *link)
+update_link_reg(struct i40e_hw *hw, struct rte_eth_link *link)
 {
 /* Link status registers and values*/
 #define I40E_PRTMAC_LINKSTA		0x001E2420
@@ -2576,8 +2576,8 @@  update_link_no_wait(struct i40e_hw *hw, struct rte_eth_link *link)
 }
 
 static __rte_always_inline void
-update_link_wait(struct i40e_hw *hw, struct rte_eth_link *link,
-	bool enable_lse)
+update_link_aq(struct i40e_hw *hw, struct rte_eth_link *link,
+	bool enable_lse, int wait_to_complete)
 {
 #define CHECK_INTERVAL             100  /* 100ms */
 #define MAX_REPEAT_TIME            10  /* 1s (10 * 100ms) in total */
@@ -2601,7 +2601,7 @@  update_link_wait(struct i40e_hw *hw, struct rte_eth_link *link,
 		}
 
 		link->link_status = link_status.link_info & I40E_AQ_LINK_UP;
-		if (unlikely(link->link_status != 0))
+		if (!wait_to_complete || link->link_status)
 			break;
 
 		rte_delay_ms(CHECK_INTERVAL);
@@ -2649,10 +2649,10 @@  i40e_dev_link_update(struct rte_eth_dev *dev,
 	link.link_autoneg = !(dev->data->dev_conf.link_speeds &
 			ETH_LINK_SPEED_FIXED);
 
-	if (!wait_to_complete)
-		update_link_no_wait(hw, &link);
+	if (!wait_to_complete && !enable_lse)
+		update_link_reg(hw, &link);
 	else
-		update_link_wait(hw, &link, enable_lse);
+		update_link_aq(hw, &link, enable_lse, wait_to_complete);
 
 	ret = rte_eth_linkstatus_set(dev, &link);
 	i40e_notify_all_vfs_link_status(dev);