lkml.org 
[lkml]   [2013]   [May]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH net, 1/2] hyperv: Fix a kernel warning from netvsc_linkstatus_callback()
2013/4/5 Haiyang Zhang <haiyangz@microsoft.com>:
> 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

This should also go to the stable tree, shouldn't it ?
At least 3.8, 3.7 and 3.4 (the 3.2 version is different, and it's in
staging. (at not used by distros anyway))


Richard.


\
 
 \ /
  Last update: 2013-05-23 11:21    [W:0.119 / U:1.344 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site