[dpdk-stable] patch 'net/sfc: fix jumbo frame flag condition for MTU set' 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/b026826262e2f2ac49bd7bde50b41aad80482b5f

Thanks.

Luca Boccassi

---
>From b026826262e2f2ac49bd7bde50b41aad80482b5f Mon Sep 17 00:00:00 2001
From: Steve Yang <stevex.yang at intel.com>
Date: Mon, 18 Jan 2021 07:04:20 +0000
Subject: [PATCH] net/sfc: fix jumbo frame flag condition for MTU set

[ upstream commit 7910fd21211f402aac7b7e7d4b6d70f224f0f9be ]

The jumbo frame uses the 'RTE_ETHER_MAX_LEN' as boundary condition,
but the Ether overhead is larger than 18 when it supports VLAN tag.
That will cause the jumbo flag rx offload is wrong when MTU size is
'RTE_ETHER_MTU'.

This fix will change the boundary condition with 'RTE_ETHER_MTU',
that perhaps impacts the cases of the jumbo frame related.

Fixes: ff6a1197c3b1 ("net/sfc: convert to new Rx offload API")

Signed-off-by: Steve Yang <stevex.yang at intel.com>
Reviewed-by: Ferruh Yigit <ferruh.yigit at intel.com>
---
 drivers/net/sfc/sfc_ethdev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/sfc/sfc_ethdev.c b/drivers/net/sfc/sfc_ethdev.c
index 93fc7baa0d..f2f5336435 100644
--- a/drivers/net/sfc/sfc_ethdev.c
+++ b/drivers/net/sfc/sfc_ethdev.c
@@ -1017,7 +1017,7 @@ sfc_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
 	 * The driver does not use it, but other PMDs update jumbo frame
 	 * flag and max_rx_pkt_len when MTU is set.
 	 */
-	if (mtu > RTE_ETHER_MAX_LEN) {
+	if (mtu > RTE_ETHER_MTU) {
 		struct rte_eth_rxmode *rxmode = &dev->data->dev_conf.rxmode;
 		rxmode->offloads |= DEV_RX_OFFLOAD_JUMBO_FRAME;
 	}
-- 
2.29.2

---
  Diff of the applied patch vs upstream commit (please double-check if non-empty:
---
--- -	2021-02-05 11:18:36.287271907 +0000
+++ 0156-net-sfc-fix-jumbo-frame-flag-condition-for-MTU-set.patch	2021-02-05 11:18:29.094696595 +0000
@@ -1 +1 @@
-From 7910fd21211f402aac7b7e7d4b6d70f224f0f9be Mon Sep 17 00:00:00 2001
+From b026826262e2f2ac49bd7bde50b41aad80482b5f Mon Sep 17 00:00:00 2001
@@ -5,0 +6,2 @@
+[ upstream commit 7910fd21211f402aac7b7e7d4b6d70f224f0f9be ]
+
@@ -15 +16,0 @@
-Cc: stable at dpdk.org