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authorJohn Fastabend <john.fastabend@gmail.com>2017-01-25 18:22:48 -0800
committerDavid S. Miller <davem@davemloft.net>2017-01-25 22:48:17 -0500
commitb68df015609eac67f045c155cb3195e5a1061d66 (patch)
tree6591853f9de1cc61b8ebdd0cd705da4a3fa440f9 /drivers/net/virtio_net.c
parent7480888f27e080ad5addb51456b2e03514721c3a (diff)
downloadlinux-b68df015609eac67f045c155cb3195e5a1061d66.tar.bz2
virtio_net: use dev_kfree_skb for small buffer XDP receive
In the small buffer case during driver unload we currently use put_page instead of dev_kfree_skb. Resolve this by adding a check for virtnet mode when checking XDP queue type. Also name the function so that the code reads correctly to match the additional check. Fixes: bb91accf2733 ("virtio-net: XDP support for small buffers") Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Jason Wang <jasowang@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/virtio_net.c')
-rw-r--r--drivers/net/virtio_net.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 3d1519ea0669..4c6e9b43f1d3 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -1898,8 +1898,12 @@ static void free_receive_page_frags(struct virtnet_info *vi)
put_page(vi->rq[i].alloc_frag.page);
}
-static bool is_xdp_queue(struct virtnet_info *vi, int q)
+static bool is_xdp_raw_buffer_queue(struct virtnet_info *vi, int q)
{
+ /* For small receive mode always use kfree_skb variants */
+ if (!vi->mergeable_rx_bufs)
+ return false;
+
if (q < (vi->curr_queue_pairs - vi->xdp_queue_pairs))
return false;
else if (q < vi->curr_queue_pairs)
@@ -1916,7 +1920,7 @@ static void free_unused_bufs(struct virtnet_info *vi)
for (i = 0; i < vi->max_queue_pairs; i++) {
struct virtqueue *vq = vi->sq[i].vq;
while ((buf = virtqueue_detach_unused_buf(vq)) != NULL) {
- if (!is_xdp_queue(vi, i))
+ if (!is_xdp_raw_buffer_queue(vi, i))
dev_kfree_skb(buf);
else
put_page(virt_to_head_page(buf));