netdev - Re: [net-next 10/13] net/mlx5e: Add support for XDP

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Message-ID: <20180730150637.0336d65b@redhat.com>
Date:   Mon, 30 Jul 2018 15:06:37 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     Saeed Mahameed <saeedm@...lanox.com>
Cc:     "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        Tariq Toukan <tariqt@...lanox.com>,
        Eugenia Emantayev <eugenia@...lanox.com>, brouer@...hat.com
Subject: Re: [net-next 10/13] net/mlx5e: Add support for XDP_REDIRECT in
 device-out side


On Mon, 30 Jul 2018 14:10:21 +0200 Jesper Dangaard Brouer <brouer@...hat.com> wrote:

> On Thu, 26 Jul 2018 15:56:44 -0700 Saeed Mahameed <saeedm@...lanox.com> wrote:
> 
> > +int mlx5e_xdp_xmit(struct net_device *dev, int n, struct xdp_frame **frames,
> > +		   u32 flags)
> > +{
[...]
> > +		xdpi.dma_addr = dma_map_single(sq->pdev, xdpf->data, xdpf->len,
> > +					       DMA_TO_DEVICE);
> > +		if (unlikely(dma_mapping_error(sq->pdev, xdpi.dma_addr))) {
> > +			drops++;  
> 
> I think you are missing a xdp_return_frame_rx_napi(xdpf) here.

I see it already got applied... I'll send a fixup later...

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer