Commit 1e405c1a authored by Björn Töpel's avatar Björn Töpel Committed by Daniel Borkmann
Browse files

xsk: do not remove umem from netdevice on fall-back to copy-mode

Commit c9b47cc1 ("xsk: fix bug when trying to use both copy and
zero-copy on one queue id") stores the umem into the netdev._rx
struct. However, the patch incorrectly removed the umem from the
netdev._rx struct when user-space passed "best-effort" mode
(i.e. select the fastest possible option available), and zero-copy
mode was not available. This commit fixes that.

Fixes: c9b47cc1

 ("xsk: fix bug when trying to use both copy and zero-copy on one queue id")
Signed-off-by: default avatarBjörn Töpel <bjorn.topel@intel.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent e451eb51
......@@ -125,9 +125,10 @@ int xdp_umem_assign_dev(struct xdp_umem *umem, struct net_device *dev,
return 0;
err_unreg_umem:
xdp_clear_umem_at_qid(dev, queue_id);
if (!force_zc)
err = 0; /* fallback to copy mode */
if (err)
xdp_clear_umem_at_qid(dev, queue_id);
out_rtnl_unlock:
rtnl_unlock();
return err;
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment