linux-kernel - [PATCH vhost 23/23] vdpa/mlx5: Don't enable non-active VQs in .set_vq

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Message-ID: <20240617-stage-vdpa-vq-precreate-v1-23-8c0483f0ca2a@nvidia.com>
Date: Mon, 17 Jun 2024 18:07:57 +0300
From: Dragos Tatulea <dtatulea@...dia.com>
To: "Michael S. Tsirkin" <mst@...hat.com>, Jason Wang <jasowang@...hat.com>,
	Xuan Zhuo <xuanzhuo@...ux.alibaba.com>, Eugenio Pérez
	<eperezma@...hat.com>, Saeed Mahameed <saeedm@...dia.com>, Leon Romanovsky
	<leon@...nel.org>, Tariq Toukan <tariqt@...dia.com>, Si-Wei Liu
	<si-wei.liu@...cle.com>
CC: <virtualization@...ts.linux.dev>, <linux-kernel@...r.kernel.org>,
	<linux-rdma@...r.kernel.org>, <netdev@...r.kernel.org>, Dragos Tatulea
	<dtatulea@...dia.com>, Cosmin Ratiu <cratiu@...dia.com>
Subject: [PATCH vhost 23/23] vdpa/mlx5: Don't enable non-active VQs in
 .set_vq_ready()

VQ indices in the range [cur_num_qps, max_vqs) represent queues that
have not yet been activated. .set_vq_ready should not activate these
VQs.

Signed-off-by: Dragos Tatulea <dtatulea@...dia.com>
Reviewed-by: Cosmin Ratiu <cratiu@...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 1a5ee0d2b47f..a969a7f105a6 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1575,6 +1575,9 @@ static int resume_vq(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq
 	if (!mvq->initialized)
 		return 0;
 
+	if (mvq->index >= ndev->cur_num_vqs)
+		return 0;
+
 	switch (mvq->fw_state) {
 	case MLX5_VIRTIO_NET_Q_OBJECT_STATE_INIT:
 		/* Due to a FW quirk we need to modify the VQ fields first then change state.

-- 
2.45.1