linux-kernel - [PATCH AUTOSEL 5.16 13/19] net/mlx5_vdpa: Offer VIRTIO_NET_F

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Date:   Sat, 22 Jan 2022 19:11:06 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Eli Cohen <elic@...dia.com>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Si-Wei Liu <si-wei.liu@...cle.com>,
        Sasha Levin <sashal@...nel.org>, parav@...dia.com,
        xieyongji@...edance.com, virtualization@...ts.linux-foundation.org
Subject: [PATCH AUTOSEL 5.16 13/19] net/mlx5_vdpa: Offer VIRTIO_NET_F_MTU when setting MTU

From: Eli Cohen <elic@...dia.com>

[ Upstream commit 60af39c1f4cc92cc2785ef745c0c97558134d539 ]

Make sure to offer VIRTIO_NET_F_MTU since we configure the MTU based on
what was queried from the device.

This allows the virtio driver to allocate large enough buffers based on
the reported MTU.

Signed-off-by: Eli Cohen <elic@...dia.com>
Link: https://lore.kernel.org/r/20211124170949.51725-1-elic@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
Acked-by: Jason Wang <jasowang@...hat.com>
Reviewed-by: Si-Wei Liu <si-wei.liu@...cle.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 63813fbb5f62a..d8e69340a25ae 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1895,6 +1895,7 @@ static u64 mlx5_vdpa_get_features(struct vdpa_device *vdev)
 	ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR);
 	ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_NET_F_MQ);
 	ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_NET_F_STATUS);
+	ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_NET_F_MTU);
 
 	print_features(mvdev, ndev->mvdev.mlx_features, false);
 	return ndev->mvdev.mlx_features;
-- 
2.34.1