linux-kernel - [PATCH net-next 3/3] vhost

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Message-Id: <20210514183954.7129-4-mcroce@linux.microsoft.com>
Date:   Fri, 14 May 2021 20:39:54 +0200
From:   Matteo Croce <mcroce@...ux.microsoft.com>
To:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        intel-wired-lan@...ts.osuosl.org,
        linux-stm32@...md-mailman.stormreply.com, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Cc:     linux-kernel@...r.kernel.org,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>
Subject: [PATCH net-next 3/3] vhost_net: use XDP helpers

From: Matteo Croce <mcroce@...rosoft.com>

Make use of the xdp_{init,prepare}_buff() helpers instead of
an open-coded version.

Also, the field xdp->rxq was never set, so pass NULL to xdp_init_buff()
to clear it.

Signed-off-by: Matteo Croce <mcroce@...rosoft.com>
---
 drivers/vhost/net.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index df82b124170e..6414bd5741b8 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -744,11 +744,9 @@ static int vhost_net_build_xdp(struct vhost_net_virtqueue *nvq,
 	if (copied != len)
 		return -EFAULT;
 
-	xdp->data_hard_start = buf;
-	xdp->data = buf + pad;
-	xdp->data_end = xdp->data + len;
+	xdp_init_buff(xdp, buflen, NULL);
+	xdp_prepare_buff(xdp, buf, pad, len, true);
 	hdr->buflen = buflen;
-	xdp->frame_sz = buflen;
 
 	--net->refcnt_bias;
 	alloc_frag->offset += buflen;
-- 
2.31.1