diff options
| author | Wenbo Li <[email protected]> | 2024-09-19 08:13:51 +0000 |
|---|---|---|
| committer | Paolo Abeni <[email protected]> | 2024-09-26 08:35:27 +0000 |
| commit | c11a49d58ad229a1be1ebe08a2b68fedf83db6c8 (patch) | |
| tree | 91639008bf8f9368617bd7ba3423eb8a2e528064 /drivers/net/netkit.c | |
| parent | bonding: Fix unnecessary warnings and logs from bond_xdp_get_xmit_slave() (diff) | |
| download | kernel-c11a49d58ad229a1be1ebe08a2b68fedf83db6c8.tar.gz kernel-c11a49d58ad229a1be1ebe08a2b68fedf83db6c8.zip | |
virtio_net: Fix mismatched buf address when unmapping for small packets
Currently, the virtio-net driver will perform a pre-dma-mapping for
small or mergeable RX buffer. But for small packets, a mismatched address
without VIRTNET_RX_PAD and xdp_headroom is used for unmapping.
That will result in unsynchronized buffers when SWIOTLB is enabled, for
example, when running as a TDX guest.
This patch unifies the address passed to the virtio core as the address of
the virtnet header and fixes the mismatched buffer address.
Changes from v2: unify the buf that passed to the virtio core in small
and merge mode.
Changes from v1: Use ctx to get xdp_headroom.
Fixes: 295525e29a5b ("virtio_net: merge dma operations when filling mergeable buffers")
Signed-off-by: Wenbo Li <[email protected]>
Signed-off-by: Jiahui Cen <[email protected]>
Signed-off-by: Ying Fang <[email protected]>
Reviewed-by: Xuan Zhuo <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Paolo Abeni <[email protected]>
Diffstat (limited to 'drivers/net/netkit.c')
0 files changed, 0 insertions, 0 deletions