From 6e6d39830bc681533d97af78e2066a7e9ab6b5d8 Mon Sep 17 00:00:00 2001 From: Si-Wei Liu <si-wei.liu@oracle.com> Date: Mon, 6 Feb 2023 15:12:00 -0800 Subject: [PATCH] vdpa: conditionally read STATUS in config space The spec says: status only exists if VIRTIO_NET_F_STATUS is set Similar to MAC and MTU, vdpa_dev_net_config_fill() should read STATUS conditionally depending on the feature bits. Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com> Reviewed-by: Parav Pandit <parav@nvidia.com> Reviewed-by: Eli Cohen <elic@nvidia.com> Message-Id: <1675725124-7375-3-git-send-email-si-wei.liu@oracle.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> --- drivers/vdpa/vdpa.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c index e71898ec5ce7..c71eecb0a288 100644 --- a/drivers/vdpa/vdpa.c +++ b/drivers/vdpa/vdpa.c @@ -848,18 +848,25 @@ static int vdpa_dev_net_mac_config_fill(struct sk_buff *msg, u64 features, sizeof(config->mac), config->mac); } +static int vdpa_dev_net_status_config_fill(struct sk_buff *msg, u64 features, + const struct virtio_net_config *config) +{ + u16 val_u16; + + if ((features & BIT_ULL(VIRTIO_NET_F_STATUS)) == 0) + return 0; + + val_u16 = __virtio16_to_cpu(true, config->status); + return nla_put_u16(msg, VDPA_ATTR_DEV_NET_STATUS, val_u16); +} + static int vdpa_dev_net_config_fill(struct vdpa_device *vdev, struct sk_buff *msg) { struct virtio_net_config config = {}; u64 features_device; - u16 val_u16; vdev->config->get_config(vdev, 0, &config, sizeof(config)); - val_u16 = __virtio16_to_cpu(true, config.status); - if (nla_put_u16(msg, VDPA_ATTR_DEV_NET_STATUS, val_u16)) - return -EMSGSIZE; - features_device = vdev->config->get_device_features(vdev); if (nla_put_u64_64bit(msg, VDPA_ATTR_DEV_FEATURES, features_device, @@ -872,6 +879,9 @@ static int vdpa_dev_net_config_fill(struct vdpa_device *vdev, struct sk_buff *ms if (vdpa_dev_net_mac_config_fill(msg, features_device, &config)) return -EMSGSIZE; + if (vdpa_dev_net_status_config_fill(msg, features_device, &config)) + return -EMSGSIZE; + return vdpa_dev_net_mq_config_fill(msg, features_device, &config); } -- 2.30.9