diff mbox series

[net-next,v5,04/15] xsk: XDP_SETUP_XSK_POOL support option IFF_NOT_USE_DMA_ADDR

Message ID 20210610082209.91487-5-xuanzhuo@linux.alibaba.com
State New
Headers show
Series virtio-net: support xdp socket zero copy | expand

Commit Message

Xuan Zhuo June 10, 2021, 8:21 a.m. UTC 
Some devices, such as virtio-net, do not directly use dma addr. These
devices do not initialize dma after completing the xsk setup, so the dma
check is skipped here.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
---
 net/xdp/xsk_buff_pool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c
index 8de01aaac4a0..a7e434de0308 100644
--- a/net/xdp/xsk_buff_pool.c
+++ b/net/xdp/xsk_buff_pool.c
@@ -171,7 +171,7 @@  int xp_assign_dev(struct xsk_buff_pool *pool,
 	if (err)
 		goto err_unreg_pool;
 
-	if (!pool->dma_pages) {
+	if (!(netdev->priv_flags & IFF_NOT_USE_DMA_ADDR) && !pool->dma_pages) {
 		WARN(1, "Driver did not DMA map zero-copy buffers");
 		err = -EINVAL;
 		goto err_unreg_xsk;