[PATCH net-next v2 1/3] xsk: Remove non-zero 'dma_page' check in xp_assign_dev

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Now dma mappings are used by the physical NICs. However the vNIC
maybe do not need them. So remove non-zero 'dma_page' check in

Signed-off-by: Yunjian Wang <wangyunjian@xxxxxxxxxx>
 net/xdp/xsk_buff_pool.c | 7 -------
 1 file changed, 7 deletions(-)

diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c
index ce60ecd48a4d..a5af75b1f43c 100644
--- a/net/xdp/xsk_buff_pool.c
+++ b/net/xdp/xsk_buff_pool.c
@@ -219,16 +219,9 @@ int xp_assign_dev(struct xsk_buff_pool *pool,
 	if (err)
 		goto err_unreg_pool;
-	if (!pool->dma_pages) {
-		WARN(1, "Driver did not DMA map zero-copy buffers");
-		err = -EINVAL;
-		goto err_unreg_xsk;
-	}
 	pool->umem->zc = true;
 	return 0;
-	xp_disable_drv_zc(pool);
 	if (!force_zc)
 		err = 0; /* fallback to copy mode */

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