diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/hyperv/hyperv_net.h | 6 | ||||
| -rw-r--r-- | drivers/net/hyperv/netvsc.c | 5 |
2 files changed, 9 insertions, 2 deletions
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h index 3d940c67ea94..373455f216ce 100644 --- a/drivers/net/hyperv/hyperv_net.h +++ b/drivers/net/hyperv/hyperv_net.h @@ -637,9 +637,11 @@ struct nvsp_message { #define NETVSC_MTU 65535 #define NETVSC_MTU_MIN ETH_MIN_MTU -#define NETVSC_RECEIVE_BUFFER_SIZE (1024*1024*16) /* 16MB */ -#define NETVSC_RECEIVE_BUFFER_SIZE_LEGACY (1024*1024*15) /* 15MB */ +/* Max buffer sizes allowed by a host */ +#define NETVSC_RECEIVE_BUFFER_SIZE (1024 * 1024 * 31) /* 31MB */ +#define NETVSC_RECEIVE_BUFFER_SIZE_LEGACY (1024 * 1024 * 15) /* 15MB */ #define NETVSC_SEND_BUFFER_SIZE (1024 * 1024 * 15) /* 15MB */ + #define NETVSC_INVALID_INDEX -1 #define NETVSC_SEND_SECTION_SIZE 6144 diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c index e4bcd202a56a..e5d16a8cf0d6 100644 --- a/drivers/net/hyperv/netvsc.c +++ b/drivers/net/hyperv/netvsc.c @@ -268,6 +268,11 @@ static int netvsc_init_buf(struct hv_device *device, buf_size = device_info->recv_sections * device_info->recv_section_size; buf_size = roundup(buf_size, PAGE_SIZE); + /* Legacy hosts only allow smaller receive buffer */ + if (net_device->nvsp_version <= NVSP_PROTOCOL_VERSION_2) + buf_size = min_t(unsigned int, buf_size, + NETVSC_RECEIVE_BUFFER_SIZE_LEGACY); + net_device->recv_buf = vzalloc(buf_size); if (!net_device->recv_buf) { netdev_err(ndev, |