Commit 99d3016d authored by Haiyang Zhang's avatar Haiyang Zhang Committed by David S. Miller

hyperv: Change the receive buffer size for legacy hosts

Due to a bug in the Hyper-V host verion 2008R2, we need to use a slightly smaller
receive buffer size, otherwise the buffer will not be accepted by the legacy hosts.
Signed-off-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 3772ab1d
...@@ -513,6 +513,7 @@ struct nvsp_message { ...@@ -513,6 +513,7 @@ struct nvsp_message {
#define NETVSC_MTU 65536 #define NETVSC_MTU 65536
#define NETVSC_RECEIVE_BUFFER_SIZE (1024*1024*16) /* 16MB */ #define NETVSC_RECEIVE_BUFFER_SIZE (1024*1024*16) /* 16MB */
#define NETVSC_RECEIVE_BUFFER_SIZE_LEGACY (1024*1024*15) /* 15MB */
#define NETVSC_RECEIVE_BUFFER_ID 0xcafe #define NETVSC_RECEIVE_BUFFER_ID 0xcafe
......
...@@ -365,6 +365,11 @@ static int netvsc_connect_vsp(struct hv_device *device) ...@@ -365,6 +365,11 @@ static int netvsc_connect_vsp(struct hv_device *device)
goto cleanup; goto cleanup;
/* Post the big receive buffer to NetVSP */ /* Post the big receive buffer to NetVSP */
if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2)
net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE_LEGACY;
else
net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE;
ret = netvsc_init_recv_buf(device); ret = netvsc_init_recv_buf(device);
cleanup: cleanup:
...@@ -898,7 +903,6 @@ int netvsc_device_add(struct hv_device *device, void *additional_info) ...@@ -898,7 +903,6 @@ int netvsc_device_add(struct hv_device *device, void *additional_info)
ndev = net_device->ndev; ndev = net_device->ndev;
/* Initialize the NetVSC channel extension */ /* Initialize the NetVSC channel extension */
net_device->recv_buf_size = NETVSC_RECEIVE_BUFFER_SIZE;
spin_lock_init(&net_device->recv_pkt_list_lock); spin_lock_init(&net_device->recv_pkt_list_lock);
INIT_LIST_HEAD(&net_device->recv_pkt_list); INIT_LIST_HEAD(&net_device->recv_pkt_list);
......
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