[PATCH net-next v4 05/10] xsk: XDP_SETUP_XSK_POOL support option IFF_NOT_USE_DMA_ADDR
From: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Date: 2021-04-13 03:15:34
Also in:
bpf
Subsystem:
networking [general], the rest, xdp sockets (af_xdp) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Magnus Karlsson, Maciej Fijalkowski
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> --- net/xdp/xsk_buff_pool.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
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;
--
2.31.0