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Commit 73b62bd0 authored by Jason Wang's avatar Jason Wang Committed by David S. Miller
Browse files

virtio-net: remove the warning before XDP linearizing 



Since we use EWMA to estimate the size of rx buffer. When rx buffer
size is underestimated, it's usual to have a packet with more than one
buffers. Consider this is not a bug, remove the warning and correct
the comment before XDP linearizing.

Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d3a51d6c

drivers/net/virtio_net.c

+1 −7
Original line number Diff line number Diff line
@@ -552,14 +552,8 @@ static struct sk_buff *receive_mergeable(struct net_device *dev, 
		struct page *xdp_page;

		u32 act;



		/* No known backend devices should send packets with

		 * more than a single buffer when XDP conditions are

		 * met. However it is not strictly illegal so the case

		 * is handled as an exception and a warning is thrown.

		 */

		/* This happens when rx buffer size is underestimated */

		if (unlikely(num_buf > 1)) {

			bpf_warn_invalid_xdp_buffer();



			/* linearize data for XDP */

			xdp_page = xdp_linearize_page(rq, num_buf,

						      page, offset, &len);