Re: [PATCH hyperv-fixes,v3] hv_netvsc: Fix unwanted wakeup after tx_disable

[David Miller]

From: Haiyang Zhang <haiyangz@xxxxxxxxxxxxxxxxx>
Date: Thu, 28 Mar 2019 19:40:36 +0000

> From: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
> 
> After queue stopped, the wakeup mechanism may wake it up again
> when ring buffer usage is lower than a threshold. This may cause
> send path panic on NULL pointer when we stopped all tx queues in
> netvsc_detach and start removing the netvsc device.
> 
> This patch fix it by adding a tx_disable flag to prevent unwanted
> queue wakeup.
> 
> Fixes: 7b2ee50c0cd5 ("hv_netvsc: common detach logic")
> Reported-by: Mohammed Gamal <mgamal@xxxxxxxxxx>
> Signed-off-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>

Applied and queued up for -stable, thanks.