I would hold off on this patch for backport, even though it's a fix. I worry that some users may be depending on the old behaviour, especially if they have a single-queue setup.
/Bruce
> -----Original Message-----
> From: Xueming Li <xuemingl@nvidia.com>
> Sent: Wednesday, July 30, 2025 3:56 PM
> To: Richardson, Bruce <bruce.richardson@intel.com>
> Cc: Xueming Li <xuemingl@nvidia.com>; Burakov, Anatoly
> <anatoly.burakov@intel.com>; dpdk stable <stable@dpdk.org>
> Subject: patch 'net/ice: fix inconsistency in Rx queue VLAN tag placement' has
> been queued to stable release 23.11.5
>
> Hi,
>
> FYI, your patch has been queued to stable release 23.11.5
>
> Note it hasn't been pushed to
http://dpdk.org/browse/dpdk-stable yet.
> It will be pushed if I get no objections before 08/10/25. 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://git.dpdk.org/dpdk-stable/log/?h=23.11-staging
>
> This queued commit can be viewed at:
>
https://git.dpdk.org/dpdk-stable/commit/?h=23.11-
> staging&id=43fdac7411d9a6d408b2ce61a5c191886c6ff638
>
> Thanks.
>
> Xueming Li <xuemingl@nvidia.com>
>
> ---
> From 43fdac7411d9a6d408b2ce61a5c191886c6ff638 Mon Sep 17 00:00:00 2001
> From: Bruce Richardson <bruce.richardson@intel.com>
> Date: Fri, 27 Jun 2025 14:52:01 +0100
> Subject: [PATCH] net/ice: fix inconsistency in Rx queue VLAN tag placement
> Cc: Xueming Li <xuemingl@nvidia.com>
>
> [ upstream commit 4cd8c72f661c005900ddc39cf0cecfca16184f2a ]
>
> When VLAN or QinQ stripping is enabled in the ice driver, an
> inconsistency was observed between the placement of the VLAN tag in the
> descriptors of the final Rx queue (irrespective of the number of queues)
> vs descriptors of all other queues. This inconsistency was due to the
> fact that the driver - when updating l2tsel (L2 tag selection) field -
> used the queue id, rather than the register index for the queue. Queue 0
> is normally HW queue 1, etc., meaning the final queue never had its
> field updated.
>
> Fixes: de5da9d16430 ("net/ice: support double VLAN")
> Cc: stable@dpdk.org
>
> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
> Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
> ---
> drivers/net/ice/ice_ethdev.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
> index be826d3108..3d08e12cba 100644
> --- a/drivers/net/ice/ice_ethdev.c
> +++ b/drivers/net/ice/ice_ethdev.c
> @@ -4744,11 +4744,11 @@ static void ice_vsi_update_l2tsel(struct ice_vsi *vsi,
> enum ice_l2tsel l2tsel)
> l2tsel_bit = BIT(ICE_L2TSEL_BIT_OFFSET);
>
> for (i = 0; i < dev_data->nb_rx_queues; i++) {
> + const struct ice_rx_queue *rxq = dev_data->rx_queues[i];
> u32 qrx_context_offset;
> u32 regval;
>
> - qrx_context_offset =
> - QRX_CONTEXT(ICE_L2TSEL_QRX_CONTEXT_REG_IDX,
> i);
> + qrx_context_offset =
> QRX_CONTEXT(ICE_L2TSEL_QRX_CONTEXT_REG_IDX, rxq->reg_idx);
>
> regval = rd32(hw, qrx_context_offset);
> regval &= ~BIT(ICE_L2TSEL_BIT_OFFSET);
> --
> 2.34.1
>
> ---
> Diff of the applied patch vs upstream commit (please double-check if non-
> empty:
> ---
> --- - 2025-07-30 22:50:04.230786948 +0800
> +++ 0018-net-ice-fix-inconsistency-in-Rx-queue-VLAN-tag-place.patch 2025-
> 07-30 22:50:03.048759617 +0800
> @@ -1 +1 @@
> -From 4cd8c72f661c005900ddc39cf0cecfca16184f2a Mon Sep 17 00:00:00 2001
> +From 43fdac7411d9a6d408b2ce61a5c191886c6ff638 Mon Sep 17 00:00:00
> 2001
> @@ -4,0 +5,3 @@
> +Cc: Xueming Li <xuemingl@nvidia.com>
> +
> +[ upstream commit 4cd8c72f661c005900ddc39cf0cecfca16184f2a ]
> @@ -21 +24 @@
> - drivers/net/intel/ice/ice_ethdev.c | 4 ++--
> + drivers/net/ice/ice_ethdev.c | 4 ++--
> @@ -24,5 +27,5 @@
> -diff --git a/drivers/net/intel/ice/ice_ethdev.c
> b/drivers/net/intel/ice/ice_ethdev.c
> -index 680e7724cd..513777e372 100644
> ---- a/drivers/net/intel/ice/ice_ethdev.c
> -+++ b/drivers/net/intel/ice/ice_ethdev.c
> -@@ -4988,11 +4988,11 @@ static void ice_vsi_update_l2tsel(struct ice_vsi *vsi,
> enum ice_l2tsel l2tsel)
> +diff --git a/drivers/net/ice/ice_ethdev.c b/drivers/net/ice/ice_ethdev.c
> +index be826d3108..3d08e12cba 100644
> +--- a/drivers/net/ice/ice_ethdev.c
> ++++ b/drivers/net/ice/ice_ethdev.c
> +@@ -4744,11 +4744,11 @@ static void ice_vsi_update_l2tsel(struct ice_vsi
> *vsi, enum ice_l2tsel l2tsel)
> @@ -32 +35 @@
> -+ const struct ci_rx_queue *rxq = dev_data->rx_queues[i];
> ++ const struct ice_rx_queue *rxq = dev_data->rx_queues[i];