4.17-stable review patch. If anyone has any objections, please let me know.
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From: Dexuan Cui decui@microsoft.com
[ Upstream commit 52acf73b6e9a6962045feb2ba5a8921da2201915 ]
Recently people reported the NIC stops working after "ifdown eth0; ifup eth0". It turns out in this case the TX queues are not enabled, after the refactoring of the common detach logic: when the NIC has sub-channels, usually we enable all the TX queues after all sub-channels are set up: see rndis_set_subchannel() -> netif_device_attach(), but in the case of "ifdown eth0; ifup eth0" where the number of channels doesn't change, we also must make sure the TX queues are enabled. The patch fixes the regression.
Fixes: 7b2ee50c0cd5 ("hv_netvsc: common detach logic") Signed-off-by: Dexuan Cui decui@microsoft.com Cc: Stephen Hemminger sthemmin@microsoft.com Cc: K. Y. Srinivasan kys@microsoft.com Cc: Haiyang Zhang haiyangz@microsoft.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/hyperv/netvsc_drv.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -126,8 +126,10 @@ static int netvsc_open(struct net_device }
rdev = nvdev->extension; - if (!rdev->link_state) + if (!rdev->link_state) { netif_carrier_on(net); + netif_tx_wake_all_queues(net); + }
if (vf_netdev) { /* Setting synthetic device up transparently sets