[dpdk-stable] patch 'net/i40e: fix DCB configuration' has been queued to stable release 16.07.2

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to stable release 16.07.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable
yet. It will be pushed if I get no objections before 11/19/16.
So please shout if anyone has objections.

Thanks.

	--yliu

---
>From aba9c7a3b1874f93347e2881f1fc55096393b8f7 Mon Sep 17 00:00:00 2001
From: Jingjing Wu <jingjing.wu at intel.com>
Date: Fri, 4 Nov 2016 13:42:33 +0800
Subject: [PATCH] net/i40e: fix DCB configuration

[ upstream commit c6431c891d9e9691e3205fe5c5350071cbaeb852 ]

Removing stopping LLDP in firmware is a workaround for a
known errata which can cause Rx hang. But the changing will
cause DCB configuration fails. That is because when LLDP is
enabled, the return value of i40e_init_dcb is success. But
following check just considered the case when LLDP agent
is disabled.
This patch fixes this issue.

Fixes: fcbd40d4327b ("net/i40e: fix Rx hang when disable LLDP")

Signed-off-by: Jingjing Wu <jingjing.wu at intel.com>
Acked-by: Beilei Xing <beilei.xing at intel.com>
---
 drivers/net/i40e/i40e_ethdev.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 7614525..0a8f55d 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -9193,12 +9193,12 @@ i40e_dcb_init_configure(struct rte_eth_dev *dev, bool sw_dcb)
 	 */
 	if (sw_dcb == TRUE) {
 		ret = i40e_init_dcb(hw);
-		/* if sw_dcb, lldp agent is stopped, the return from
+		/* If lldp agent is stopped, the return value from
 		 * i40e_init_dcb we expect is failure with I40E_AQ_RC_EPERM
-		 * adminq status.
+		 * adminq status. Otherwise, it should return success.
 		 */
-		if (ret != I40E_SUCCESS &&
-		    hw->aq.asq_last_status == I40E_AQ_RC_EPERM) {
+		if ((ret == I40E_SUCCESS) || (ret != I40E_SUCCESS &&
+		    hw->aq.asq_last_status == I40E_AQ_RC_EPERM)) {
 			memset(&hw->local_dcbx_config, 0,
 				sizeof(struct i40e_dcbx_config));
 			/* set dcb default configuration */
@@ -9227,8 +9227,8 @@ i40e_dcb_init_configure(struct rte_eth_dev *dev, bool sw_dcb)
 				return -ENOSYS;
 			}
 		} else {
-			PMD_INIT_LOG(ERR, "DCBX configuration failed, err = %d,"
-					  " aq_err = %d.", ret,
+			PMD_INIT_LOG(ERR, "DCB initialization in FW fails,"
+					  " err = %d, aq_err = %d.", ret,
 					  hw->aq.asq_last_status);
 			return -ENOTSUP;
 		}
-- 
1.9.0