netdev - [PATCH] vdpa/mlx5: Setup driver only if VIRTIO_CONFIG_S_DRIVER

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20200907075136.GA114876@mtl-vdi-166.wap.labs.mlnx>
Date:   Mon, 7 Sep 2020 10:51:36 +0300
From:   Eli Cohen <elic@...dia.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>, Cindy Lu <lulu@...hat.com>,
        <virtualization@...ts.linux-foundation.org>,
        netdev <netdev@...r.kernel.org>
Subject: [PATCH] vdpa/mlx5: Setup driver only if VIRTIO_CONFIG_S_DRIVER_OK

If the memory map changes before the driver status is
VIRTIO_CONFIG_S_DRIVER_OK, don't attempt to create resources because it
may fail. For example, if the VQ is not ready there is no point in
creating resources.

Fixes: 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")
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 9df69d5efe8c..c89cd48a0aab 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -1645,6 +1645,9 @@ static int mlx5_vdpa_change_map(struct mlx5_vdpa_net *ndev, struct vhost_iotlb *
 	if (err)
 		goto err_mr;
 
+	if (!(ndev->mvdev.status & VIRTIO_CONFIG_S_DRIVER_OK))
+		return 0;
+
 	restore_channels_info(ndev);
 	err = setup_driver(ndev);
 	if (err)
-- 
2.26.0