From 1b01994aa6f9bad60d2b162c17dca530c21e2687 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Wed, 19 Jul 2017 11:53:12 -0700 Subject: [PATCH] netvsc: force link update after MTU change If two MTU changes are in less than update interval (2 seconds), then the netvsc network device may get stuck with no carrier. The netvsc driver debounces link status events which is fine for unsolicited updates, but blocks getting the update after down/up from MTU reinitialization. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- drivers/net/hyperv/netvsc_drv.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 63c98bb..09b07ca 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -783,6 +783,7 @@ static int netvsc_set_channels(struct net_device *net, ret = netvsc_open(net); /* We may have missed link change notifications */ + net_device_ctx->last_reconfig = 0; schedule_delayed_work(&net_device_ctx->dwork, 0); return ret; -- 2.7.4