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hv_netvsc: Add handler for physical link speed change

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On Hyper-V host 2016 and later, VMs gets an event message of the physical
link speed when vSwitch is changed. This patch handles this message, so
the updated link speed can be reported by ethtool.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Haiyang Zhang
2016-08-04 10:42:15 -07:00
committed by David S. Miller
parent b37879e6ca
commit 7f5d5af0b2
3 changed files with 25 additions and 7 deletions
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25
drivers/net/hyperv/netvsc_drv.c
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@@ -579,19 +579,32 @@ void netvsc_linkstatus_callback(struct hv_device *device_obj,
struct netvsc_reconfig *event;
unsigned long flags;
/* Handle link change statuses only */
net = hv_get_drvdata(device_obj);
if (!net)
return;
ndev_ctx = netdev_priv(net);
/* Update the physical link speed when changing to another vSwitch */
if (indicate->status == RNDIS_STATUS_LINK_SPEED_CHANGE) {
u32 speed;
speed = *(u32 *)((void *)indicate + indicate->
status_buf_offset) / 10000;
ndev_ctx->speed = speed;
return;
}
/* Handle these link change statuses below */
if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE &&
indicate->status != RNDIS_STATUS_MEDIA_CONNECT &&
indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT)
return;
net = hv_get_drvdata(device_obj);
if (!net || net->reg_state != NETREG_REGISTERED)
if (net->reg_state != NETREG_REGISTERED)
return;
ndev_ctx = netdev_priv(net);
event = kzalloc(sizeof(*event), GFP_ATOMIC);
if (!event)
return;