From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark McLoughlin <markmc@redhat.com>
Subject: Re: [PATCH] Use guards in virtio-net for easier upstream merging
Date: Thu, 04 Dec 2008 12:06:48 +0000
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To: Anthony Liguori <aliguori@us.ibm.com>
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On Wed, 2008-12-03 at 14:32 -0600, Anthony Liguori wrote:

> @@ -189,6 +205,9 @@ static void virtio_net_receive(void *opaque, const uint8_t *buf, int size)
>      struct virtio_net_hdr_mrg_rxbuf *mhdr = NULL;
>      int hdr_len, offset, i;
>  
> +    if (!virtio_net_can_receive(opaque))
> +        return;

Should pass the buffer size to virtio_net_can_receive() to limit the
work virtqueue_avail_bytes() has to do.

Cheers,
Mark.