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| author | Haiyang Zhang <haiyangz@microsoft.com> | 2014-11-12 22:07:44 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-11-12 21:21:36 (GMT) |
| commit | 4d3c9d37f77566b04216dfc9a6513082002d7a1f (patch) | |
| tree | c23efd4874c81912f2ad9a176ba57d74c9ec637a /drivers/net/hyperv/rndis_filter.c | |
| parent | 5226cfc500022104d92813ee218608e80f56ead6 (diff) | |
| download | linux-4d3c9d37f77566b04216dfc9a6513082002d7a1f.tar.xz | |
hyperv: Add processing of MTU reduced by the host
If the host uses packet encapsulation feature, the MTU may be reduced by the
host due to headroom reservation for encapsulation. This patch handles this
new MTU value.
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/hyperv/rndis_filter.c')
| -rw-r--r-- | drivers/net/hyperv/rndis_filter.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/net/hyperv/rndis_filter.c b/drivers/net/hyperv/rndis_filter.c index ccce6f2..7b2c5d1 100644 --- a/drivers/net/hyperv/rndis_filter.c +++ b/drivers/net/hyperv/rndis_filter.c @@ -998,6 +998,7 @@ int rndis_filter_device_add(struct hv_device *dev, int t; struct ndis_recv_scale_cap rsscap; u32 rsscap_size = sizeof(struct ndis_recv_scale_cap); + u32 mtu, size; rndis_device = get_rndis_device(); if (!rndis_device) @@ -1029,6 +1030,14 @@ int rndis_filter_device_add(struct hv_device *dev, return ret; } + /* Get the MTU from the host */ + size = sizeof(u32); + ret = rndis_filter_query_device(rndis_device, + RNDIS_OID_GEN_MAXIMUM_FRAME_SIZE, + &mtu, &size); + if (ret == 0 && size == sizeof(u32)) + net_device->ndev->mtu = mtu; + /* Get the mac address */ ret = rndis_filter_query_device_mac(rndis_device); if (ret != 0) { |