[dpdk-stable] patch 'net/ixgbe: fix RSS RETA being reset after port start' has been queued to stable release 20.11.2

[Xueming Li]

Hi,

FYI, your patch has been queued to stable release 20.11.2

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 05/12/21. So please
shout if anyone has objections.

Also note that after the patch there's a diff of the upstream commit vs the
patch applied to the branch. This will indicate if there was any rebasing
needed to apply to the stable branch. If there were code changes for rebasing
(ie: not only metadata diffs), please double check that the rebase was
correctly done.

Queued patches are on a temporary branch at:
https://github.com/steevenlee/dpdk

This queued commit can be viewed at:
https://github.com/steevenlee/dpdk/commit/7f55ac318c25cfaa6459faaaffdc1b33d0a05e10

Thanks.

Xueming Li <xuemingl at nvidia.com>

---
>From 7f55ac318c25cfaa6459faaaffdc1b33d0a05e10 Mon Sep 17 00:00:00 2001
From: Murphy Yang <murphyx.yang at intel.com>
Date: Mon, 29 Mar 2021 08:28:45 +0000
Subject: [PATCH] net/ixgbe: fix RSS RETA being reset after port start
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Cc: Luca Boccassi <bluca at debian.org>

[ upstream commit 8b628c22b38f7a81b6cba677aaabd140d8583ae5 ]

If one calls ‘rte_eth_dev_rss_reta_update’ with ixgbe before starting
the device (but after setting everything else), then RSS RETA
configuration will be zero after starting the device.

This patch gives a notification if the port not started.

Bugzilla ID: 664
Fixes: 249358424eab ("ixgbe: RSS RETA configuration")

Signed-off-by: Murphy Yang <murphyx.yang at intel.com>
Acked-by: Haiyue Wang <haiyue.wang at intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index fa0f5afd03..6195c7f025 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -5007,11 +5007,19 @@ ixgbe_dev_rss_reta_update(struct rte_eth_dev *dev,
 	uint32_t reta, r;
 	uint16_t idx, shift;
 	struct ixgbe_adapter *adapter = dev->data->dev_private;
+	struct rte_eth_dev_data *dev_data = dev->data;
 	struct ixgbe_hw *hw = IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
 	uint32_t reta_reg;
 
 	PMD_INIT_FUNC_TRACE();
 
+	if (!dev_data->dev_started) {
+		PMD_DRV_LOG(ERR,
+			"port %d must be started before rss reta update",
+			 dev_data->port_id);
+		return -EIO;
+	}
+
 	if (!ixgbe_rss_update_sp(hw->mac.type)) {
 		PMD_DRV_LOG(ERR, "RSS reta update is not supported on this "
 			"NIC.");
-- 
2.25.1

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-05-10 23:59:29.645793200 +0800
+++ 0118-net-ixgbe-fix-RSS-RETA-being-reset-after-port-start.patch	2021-05-10 23:59:26.520000000 +0800
@@ -1 +1 @@
-From 8b628c22b38f7a81b6cba677aaabd140d8583ae5 Mon Sep 17 00:00:00 2001
+From 7f55ac318c25cfaa6459faaaffdc1b33d0a05e10 Mon Sep 17 00:00:00 2001
@@ -7,0 +8,3 @@
+Cc: Luca Boccassi <bluca at debian.org>
+
+[ upstream commit 8b628c22b38f7a81b6cba677aaabd140d8583ae5 ]
@@ -17 +19,0 @@
-Cc: stable at dpdk.org
@@ -26 +28 @@
-index be9c438c10..31faff066c 100644
+index fa0f5afd03..6195c7f025 100644
@@ -29 +31 @@
-@@ -5013,11 +5013,19 @@ ixgbe_dev_rss_reta_update(struct rte_eth_dev *dev,
+@@ -5007,11 +5007,19 @@ ixgbe_dev_rss_reta_update(struct rte_eth_dev *dev,