On Tue, Jan 17, 2017 at 02:19:50PM -0800, John Fastabend wrote: > 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.fastab...@intel.com> > Acked-by: Jason Wang <jasow...@redhat.com>
Acked-by: Michael S. Tsirkin <m...@redhat.com> I think we definitely want this one in -net as it's a bugfix. > --- > drivers/net/virtio_net.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > index 4a10500..d97bb71 100644 > --- a/drivers/net/virtio_net.c > +++ b/drivers/net/virtio_net.c > @@ -1890,8 +1890,12 @@ 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) > @@ -1908,7 +1912,7 @@ 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));