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https://github.com/torvalds/linux
05 April 2024, 19:05:47 UTC
Revision d084d996aaf53c0cc583dc75a4fc2a67fe485846 authored by Si-Wei Liu on 08 April 2021, 09:10:43 UTC, committed by Michael S. Tsirkin on 09 April 2021, 16:08:27 UTC 
vdpa/mlx5: should exclude header length and fcs from mtu
 
When feature VIRTIO_NET_F_MTU is negotiated on mlx5_vdpa,
22 extra bytes worth of MTU length is shown in guest.
This is because the mlx5_query_port_max_mtu API returns
the "hardware" MTU value, which does not just contain the
 Ethernet payload, but includes extra lengths starting
from the Ethernet header up to the FCS altogether.

Fix the MTU so packets won't get dropped silently.

Fixes: 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")
Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Eli Cohen <elic@nvidia.com>
Link: https://lore.kernel.org/r/20210408091047.4269-2-elic@nvidia.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
1 parent e49d033
History
Tip revision: d084d996aaf53c0cc583dc75a4fc2a67fe485846 authored by Si-Wei Liu on 08 April 2021, 09:10:43 UTC
vdpa/mlx5: should exclude header length and fcs from mtu
Tip revision: d084d99
File Mode Size
.gitignore -rw-r--r-- 62 bytes
Kconfig -rw-r--r-- 3.4 KB
Makefile -rw-r--r-- 4.1 KB
blacklist.c -rw-r--r-- 4.1 KB
blacklist.h -rw-r--r-- 84 bytes
blacklist_hashes.c -rw-r--r-- 166 bytes
blacklist_nohashes.c -rw-r--r-- 122 bytes
system_certificates.S -rw-r--r-- 828 bytes
system_keyring.c -rw-r--r-- 8.8 KB
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