Messages in this thread Patch in this message | | | From | Haiyang Zhang <> | Subject | [PATCH net,1/2] hyperv: Fix a kernel warning from netvsc_linkstatus_callback() | Date | Fri, 5 Apr 2013 14:44:39 -0700 |
| |
The warning about local_bh_enable inside IRQ happens when disconnecting a virtual NIC.
The reason for the warning is -- netif_tx_disable() is called when the NIC is disconnected. And it's called within irq context. netif_tx_disable() calls local_bh_enable() which displays warning if in irq.
The fix is to remove the unnecessary netif_tx_disable & wake_queue() in the netvsc_linkstatus_callback().
Reported-by: Richard Genoud <richard.genoud@gmail.com> Tested-by: Long Li <longli@microsoft.com> Tested-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com> Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
--- drivers/net/hyperv/netvsc_drv.c | 2 -- 1 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 5f85205..8341b62 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -241,13 +241,11 @@ void netvsc_linkstatus_callback(struct hv_device *device_obj, if (status == 1) { netif_carrier_on(net); - netif_wake_queue(net); ndev_ctx = netdev_priv(net); schedule_delayed_work(&ndev_ctx->dwork, 0); schedule_delayed_work(&ndev_ctx->dwork, msecs_to_jiffies(20)); } else { netif_carrier_off(net); - netif_tx_disable(net); } } -- 1.7.4.1
| |