netdev - [PATCH V3 3/6] vDPA: check VIRTIO_NET_F_RSS for max_virtqueue

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Date:   Thu, 29 Sep 2022 09:45:52 +0800
From:   Zhu Lingshan <lingshan.zhu@...el.com>
To:     jasowang@...hat.com, mst@...hat.com
Cc:     virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        kvm@...r.kernel.org, Zhu Lingshan <lingshan.zhu@...el.com>
Subject: [PATCH V3 3/6] vDPA: check VIRTIO_NET_F_RSS for max_virtqueue_paris's presence

virtio 1.2 spec says:
max_virtqueue_pairs only exists if VIRTIO_NET_F_MQ or
VIRTIO_NET_F_RSS is set.

So when reporint MQ to userspace, it should check both
VIRTIO_NET_F_MQ and VIRTIO_NET_F_RSS.

unused parameter struct vdpa_device *vdev is removed

Signed-off-by: Zhu Lingshan <lingshan.zhu@...el.com>
Acked-by: Jason Wang <jasowang@...hat.com>
---
 drivers/vdpa/vdpa.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
index 52b7f5d23127..70448deb9cd9 100644
--- a/drivers/vdpa/vdpa.c
+++ b/drivers/vdpa/vdpa.c
@@ -799,13 +799,13 @@ static int vdpa_nl_cmd_dev_get_dumpit(struct sk_buff *msg, struct netlink_callba
 	return msg->len;
 }
 
-static int vdpa_dev_net_mq_config_fill(struct vdpa_device *vdev,
-				       struct sk_buff *msg, u64 features,
+static int vdpa_dev_net_mq_config_fill(struct sk_buff *msg, u64 features,
 				       const struct virtio_net_config *config)
 {
 	u16 val_u16;
 
-	if ((features & BIT_ULL(VIRTIO_NET_F_MQ)) == 0)
+	if ((features & BIT_ULL(VIRTIO_NET_F_MQ)) == 0 &&
+	    (features & BIT_ULL(VIRTIO_NET_F_RSS)) == 0)
 		return 0;
 
 	val_u16 = le16_to_cpu(config->max_virtqueue_pairs);
-- 
2.31.1