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authorZhang Changzhong <zhangchangzhong@huawei.com>2020-12-04 13:21:16 +0300
committerDaniel Borkmann <daniel@iogearbox.net>2020-12-04 18:48:31 +0300
commit12c8a8ca117f3d734babc3fba131fdaa329d2163 (patch)
tree5db836caee97a915dd8b242c149b59f7b0d2ef40 /net/xdp
parent3413f04141aa440c71da187755e8e22f5093ce83 (diff)
downloadlinux-12c8a8ca117f3d734babc3fba131fdaa329d2163.tar.xz
xsk: Return error code if force_zc is set
If force_zc is set, we should exit out with an error, not fall back to copy mode. Fixes: 921b68692abb ("xsk: Enable sharing of dma mappings") Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Magnus Karlsson <magnus.karlsson@intel.com> Link: https://lore.kernel.org/bpf/1607077277-41995-1-git-send-email-zhangchangzhong@huawei.com
Diffstat (limited to 'net/xdp')
-rw-r--r--net/xdp/xsk_buff_pool.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/xdp/xsk_buff_pool.c b/net/xdp/xsk_buff_pool.c
index 9287eddec52c..d5adeee9d5d9 100644
--- a/net/xdp/xsk_buff_pool.c
+++ b/net/xdp/xsk_buff_pool.c
@@ -175,6 +175,7 @@ static int __xp_assign_dev(struct xsk_buff_pool *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;