linux-kernel - [PATH v2 2/8] vdpa/mlx5: Return error on vlan ctrl commands if not supported

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Date:   Mon, 14 Nov 2022 15:17:53 +0200
From:   Eli Cohen <elic@...dia.com>
To:     <mst@...hat.com>, <jasowang@...hat.com>,
        <linux-kernel@...r.kernel.org>,
        <virtualization@...ts.linux-foundation.org>
CC:     <si-wei.liu@...cle.com>, <eperezma@...hat.com>, <lulu@...hat.com>,
        "Eli Cohen" <elic@...dia.com>
Subject: [PATH v2 2/8] vdpa/mlx5: Return error on vlan ctrl commands if not supported

Check if VIRTIO_NET_F_CTRL_VLAN is negotiated and return error if
control VQ command is received.

Signed-off-by: Eli Cohen <elic@...dia.com>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 3fb06dcee943..01da229d22da 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1823,6 +1823,9 @@ static virtio_net_ctrl_ack handle_ctrl_vlan(struct mlx5_vdpa_dev *mvdev, u8 cmd)
 	size_t read;
 	u16 id;
 
+	if (!(ndev->mvdev.actual_features & BIT_ULL(VIRTIO_NET_F_CTRL_VLAN)))
+		return status;
+
 	switch (cmd) {
 	case VIRTIO_NET_CTRL_VLAN_ADD:
 		read = vringh_iov_pull_iotlb(&cvq->vring, &cvq->riov, &vlan, sizeof(vlan));
-- 
2.38.1