diff options
| author | stephen hemminger <stephen@networkplumber.org> | 2016-12-06 13:43:54 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-01-15 13:41:34 +0100 |
| commit | 33c7b0f74c57d1a3c0a623ce794d7f61e097d09c (patch) | |
| tree | b00d8360384a65ecb8aee8bd6fbd6b3f9eabd99f /drivers/net/hyperv | |
| parent | 49c4446a2e13b3e4ff2d953ca8e2d961964d0351 (diff) | |
netvsc: reduce maximum GSO size
[ Upstream commit a50af86dd49ee1851d1ccf06dd0019c05b95e297 ]
Hyper-V (and Azure) support using NVGRE which requires some extra space
for encapsulation headers. Because of this the largest allowed TSO
packet is reduced.
For older releases, hard code a fixed reduced value. For next release,
there is a better solution which uses result of host offload
negotiation.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/hyperv')
| -rw-r--r-- | drivers/net/hyperv/netvsc_drv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 409b48e1e589..7a601d8c615e 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -40,6 +40,8 @@ #include "hyperv_net.h" +/* Restrict GSO size to account for NVGRE */ +#define NETVSC_GSO_MAX_SIZE 62768 #define RING_SIZE_MIN 64 static int ring_size = 128; @@ -852,6 +854,7 @@ static int netvsc_set_channels(struct net_device *net, } goto recover; } + netif_set_gso_max_size(net, NETVSC_GSO_MAX_SIZE); out: netvsc_open(net); |