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virtio-net: Fix num_buffers for version 1

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The specification says the device MUST set num_buffers to 1 if
VIRTIO_NET_F_MRG_RXBUF has not been negotiated.

Fixes: df91055db5 ("virtio-net: enable virtio 1.0")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20250108-buffers-v1-1-a0c85ff31aeb@daynix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit c17ad4b11b)
(Mjt: adjust for 7.2.x)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Akihiko Odaki 2025-01-08 21:13:29 +09:00 • committed by Michael Tokarev
parent d34c201195
commit cefd67f254
1 changed files with 2 additions and 0 deletions
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2
hw/net/virtio-net.c
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@ -1914,6 +1914,8 @@ static ssize_t virtio_net_receive_rcu(NetClientState *nc, const uint8_t *buf,
sg, elem->in_num,
offsetof(typeof(mhdr), num_buffers),
sizeof(mhdr.num_buffers));
} else {
mhdr.num_buffers = cpu_to_le16(1);
}
receive_header(n, sg, elem->in_num, buf, size);