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authorBjörn Töpel <bjorn.topel@intel.com>2019-02-12 08:51:14 +0100
committerDaniel Borkmann <daniel@iogearbox.net>2019-02-12 17:04:45 +0100
commit1e405c1a3f667bf152905127b94e9c8f454a343e (patch)
treec34a89d9982bf94b3c0ab423f246e9d6bd6129e7 /net/xdp
parente451eb51068496054d071af10b3530af4002a4f4 (diff)
downloadlinux-1e405c1a3f667bf152905127b94e9c8f454a343e.tar.bz2
xsk: do not remove umem from netdevice on fall-back to copy-mode
Commit c9b47cc1fabc ("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: c9b47cc1fabc ("xsk: fix bug when trying to use both copy and zero-copy on one queue id") Signed-off-by: Björn Töpel <bjorn.topel@intel.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'net/xdp')
-rw-r--r--net/xdp/xdp_umem.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c
index 597866e7c441..37e1fe180769 100644
--- a/net/xdp/xdp_umem.c
+++ b/net/xdp/xdp_umem.c
@@ -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;