[PATCH net] hyperv: Fix the carrier status setting

From: Haiyang Zhang
Date: Sun Feb 09 2014 - 19:17:29 EST


Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Reviewed-by: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
---
drivers/net/hyperv/netvsc_drv.c | 24 +++++++++++++++---------
1 files changed, 15 insertions(+), 9 deletions(-)

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 7756118..836211c 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -88,8 +88,12 @@ static int netvsc_open(struct net_device *net)
{
struct net_device_context *net_device_ctx = netdev_priv(net);
struct hv_device *device_obj = net_device_ctx->device_ctx;
+ struct netvsc_device *nvdev;
+ struct rndis_device *rdev;
int ret = 0;

+ netif_carrier_off(net);
+
/* Open up the device */
ret = rndis_filter_open(device_obj);
if (ret != 0) {
@@ -99,6 +103,11 @@ static int netvsc_open(struct net_device *net)

netif_start_queue(net);

+ nvdev = hv_get_drvdata(device_obj);
+ rdev = nvdev->extension;
+ if (!rdev->link_state)
+ netif_carrier_on(net);
+
return ret;
}

@@ -229,15 +238,17 @@ void netvsc_linkstatus_callback(struct hv_device *device_obj,
struct net_device *net;
struct net_device_context *ndev_ctx;
struct netvsc_device *net_device;
+ struct rndis_device *rdev;

net_device = hv_get_drvdata(device_obj);
+ rdev = net_device->extension;
+
+ rdev->link_state = !(status == 1);
+
net = net_device->ndev;

- if (!net) {
- netdev_err(net, "got link status but net device "
- "not initialized yet\n");
+ if (!net || net->reg_state != NETREG_REGISTERED)
return;
- }

if (status == 1) {
netif_carrier_on(net);
@@ -414,9 +425,6 @@ static int netvsc_probe(struct hv_device *dev,
if (!net)
return -ENOMEM;

- /* Set initial state */
- netif_carrier_off(net);
-
net_device_ctx = netdev_priv(net);
net_device_ctx->device_ctx = dev;
hv_set_drvdata(dev, net);
@@ -443,8 +451,6 @@ static int netvsc_probe(struct hv_device *dev,
}
memcpy(net->dev_addr, device_info.mac_adr, ETH_ALEN);

- netif_carrier_on(net);
-
ret = register_netdev(net);
if (ret != 0) {
pr_err("Unable to register netdev.\n");
--
1.7.4.1

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