[dpdk-stable] patch 'net/i40e: fix returned code for RSS hardware failure' has been queued to stable release 20.11.1

[luca.boccassi at gmail.com]

Hi,

FYI, your patch has been queued to stable release 20.11.1

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 02/07/21. 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/bluca/dpdk-stable

This queued commit can be viewed at:
https://github.com/bluca/dpdk-stable/commit/b944df6b68c04f6075bfe4eed81246de85dc0d81

Thanks.

Luca Boccassi

---
>From b944df6b68c04f6075bfe4eed81246de85dc0d81 Mon Sep 17 00:00:00 2001
From: Alvin Zhang <alvinx.zhang at intel.com>
Date: Fri, 8 Jan 2021 13:35:39 +0800
Subject: [PATCH] net/i40e: fix returned code for RSS hardware failure

[ upstream commit c222d2a1d00719564526e5a14ca24622bebc0712 ]

The API should return the system error status, but it returned the
hardware error status, this is confuses the caller.
This patch adds check on hardware execution status and returns -EIO
in case of hardware execution failure.

Fixes: 1d4b2b4966bb ("net/i40e: fix VF overwrite PF RSS LUT for X722")
Fixes: d0a349409bd7 ("i40e: support AQ based RSS config")

Signed-off-by: Alvin Zhang <alvinx.zhang at intel.com>
Acked-by: Qi Zhang <qi.z.zhang at intel.com>
---
 drivers/net/i40e/i40e_ethdev.c | 33 ++++++++++++++++++++-------------
 1 file changed, 20 insertions(+), 13 deletions(-)

diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
index 7f9bba4052..5984e52abd 100644
--- a/drivers/net/i40e/i40e_ethdev.c
+++ b/drivers/net/i40e/i40e_ethdev.c
@@ -4443,7 +4443,6 @@ i40e_set_rss_lut(struct i40e_vsi *vsi, uint8_t *lut, uint16_t lut_size)
 {
 	struct i40e_pf *pf;
 	struct i40e_hw *hw;
-	int ret;
 
 	if (!vsi || !lut)
 		return -EINVAL;
@@ -4452,12 +4451,16 @@ i40e_set_rss_lut(struct i40e_vsi *vsi, uint8_t *lut, uint16_t lut_size)
 	hw = I40E_VSI_TO_HW(vsi);
 
 	if (pf->flags & I40E_FLAG_RSS_AQ_CAPABLE) {
-		ret = i40e_aq_set_rss_lut(hw, vsi->vsi_id,
-					  vsi->type != I40E_VSI_SRIOV,
-					  lut, lut_size);
-		if (ret) {
-			PMD_DRV_LOG(ERR, "Failed to set RSS lookup table");
-			return ret;
+		enum i40e_status_code status;
+
+		status = i40e_aq_set_rss_lut(hw, vsi->vsi_id,
+					     vsi->type != I40E_VSI_SRIOV,
+					     lut, lut_size);
+		if (status) {
+			PMD_DRV_LOG(ERR,
+				    "Failed to update RSS lookup table, error status: %d",
+				    status);
+			return -EIO;
 		}
 	} else {
 		uint32_t *lut_dw = (uint32_t *)lut;
@@ -7612,7 +7615,6 @@ i40e_set_rss_key(struct i40e_vsi *vsi, uint8_t *key, uint8_t key_len)
 	uint16_t key_idx = (vsi->type == I40E_VSI_SRIOV) ?
 			   I40E_VFQF_HKEY_MAX_INDEX :
 			   I40E_PFQF_HKEY_MAX_INDEX;
-	int ret = 0;
 
 	if (!key || key_len == 0) {
 		PMD_DRV_LOG(DEBUG, "No key to be configured");
@@ -7625,11 +7627,16 @@ i40e_set_rss_key(struct i40e_vsi *vsi, uint8_t *key, uint8_t key_len)
 
 	if (pf->flags & I40E_FLAG_RSS_AQ_CAPABLE) {
 		struct i40e_aqc_get_set_rss_key_data *key_dw =
-			(struct i40e_aqc_get_set_rss_key_data *)key;
+				(struct i40e_aqc_get_set_rss_key_data *)key;
+		enum i40e_status_code status =
+				i40e_aq_set_rss_key(hw, vsi->vsi_id, key_dw);
 
-		ret = i40e_aq_set_rss_key(hw, vsi->vsi_id, key_dw);
-		if (ret)
-			PMD_INIT_LOG(ERR, "Failed to configure RSS key via AQ");
+		if (status) {
+			PMD_DRV_LOG(ERR,
+				    "Failed to configure RSS key via AQ, error status: %d",
+				    status);
+			return -EIO;
+		}
 	} else {
 		uint32_t *hash_key = (uint32_t *)key;
 		uint16_t i;
@@ -7649,7 +7656,7 @@ i40e_set_rss_key(struct i40e_vsi *vsi, uint8_t *key, uint8_t key_len)
 		I40E_WRITE_FLUSH(hw);
 	}
 
-	return ret;
+	return 0;
 }
 
 static int
-- 
2.29.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-02-05 11:18:33.363257364 +0000
+++ 0091-net-i40e-fix-returned-code-for-RSS-hardware-failure.patch	2021-02-05 11:18:28.942693701 +0000
@@ -1 +1 @@
-From c222d2a1d00719564526e5a14ca24622bebc0712 Mon Sep 17 00:00:00 2001
+From b944df6b68c04f6075bfe4eed81246de85dc0d81 Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit c222d2a1d00719564526e5a14ca24622bebc0712 ]
+
@@ -13 +14,0 @@
-Cc: stable at dpdk.org