From a5ecd43992a7cd9f91d5f98b0082ae44df5e543c Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Wed, 7 Jun 2017 15:53:48 -0700 Subject: [PATCH] netvsc: fix net poll mode The ndo_poll_controller function needs to schedule NAPI to pick up arriving packets and send completions. Otherwise no data will ever be received. For simple case of netconsole, it also will allow send completions to happen. Without this netpoll will eventually get stuck. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- drivers/net/hyperv/netvsc_drv.c | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index d93e4da..252e5d5 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -1158,11 +1158,22 @@ netvsc_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info, } #ifdef CONFIG_NET_POLL_CONTROLLER -static void netvsc_poll_controller(struct net_device *net) +static void netvsc_poll_controller(struct net_device *dev) { - /* As netvsc_start_xmit() works synchronous we don't have to - * trigger anything here. - */ + struct net_device_context *ndc = netdev_priv(dev); + struct netvsc_device *ndev; + int i; + + rcu_read_lock(); + ndev = rcu_dereference(ndc->nvdev); + if (ndev) { + for (i = 0; i < ndev->num_chn; i++) { + struct netvsc_channel *nvchan = &ndev->chan_table[i]; + + napi_schedule(&nvchan->napi); + } + } + rcu_read_unlock(); } #endif -- 2.7.4