Now, the premapped mode encounters some problem.
http://lore.kernel.org/all/8b20cc28-45a9-4643-8e87-ba164a540c0a@xxxxxxxxxx
So we disable the premapped mode by default.
We can re-enable it in the future.
Fixes: f9dac92ba908 ("virtio_ring: enable premapped mode whatever use_dma_api")
Reported-by: "Si-Wei Liu" <si-wei.liu@xxxxxxxxxx>
Closes: http://lore.kernel.org/all/8b20cc28-45a9-4643-8e87-ba164a540c0a@xxxxxxxxxx
Signed-off-by: Xuan Zhuo <xuanzhuo@xxxxxxxxxxxxxxxxx>
---
drivers/net/virtio_net.c | 18 ------------------
1 file changed, 18 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index b68e64e8c7b6..284db2912808 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -979,22 +979,6 @@ static void *virtnet_rq_alloc(struct receive_queue *rq, u32 size, gfp_t gfp)
return buf;
}
-static void virtnet_rq_set_premapped(struct virtnet_info *vi)
-{
- int i;
-
- /* disable for big mode */
- if (!vi->mergeable_rx_bufs && vi->big_packets)
- return;
-
- for (i = 0; i < vi->max_queue_pairs; i++) {
- if (virtqueue_set_dma_premapped(vi->rq[i].vq))
- continue;
-
- vi->rq[i].do_dma = true;
- }
-}
-
static void virtnet_rq_unmap_free_buf(struct virtqueue *vq, void *buf)
{
struct virtnet_info *vi = vq->vdev->priv;
@@ -6126,8 +6110,6 @@ static int init_vqs(struct virtnet_info *vi)
if (ret)
goto err_free;
- virtnet_rq_set_premapped(vi);
-
cpus_read_lock();
virtnet_set_affinity(vi);
cpus_read_unlock();
--
2.32.0.3.g01195cf9f
