netdev - Re: [e1000_netpoll] BUG: sleeping function called from invalid context at kernel/irq/manage.c:110

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Message-ID: <1469655487.2232.49.camel@intel.com>
Date:	Wed, 27 Jul 2016 14:38:07 -0700
From:	Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To:	Eric Dumazet <eric.dumazet@...il.com>,
	Fengguang Wu <fengguang.wu@...el.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org,
	Satyam Sharma <satyam@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	intel-wired-lan@...ts.osuosl.org,
	Ye Xiaolong <xiaolong.ye@...el.com>
Subject: Re: [e1000_netpoll] BUG: sleeping function called from invalid
 context at kernel/irq/manage.c:110

On Tue, 2016-07-26 at 11:14 +0200, Eric Dumazet wrote:
> Could you try this ?
> 
> diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c
> b/drivers/net/ethernet/intel/e1000/e1000_main.c
> index
> f42129d09e2c23ba9fdb5cde890d50ecb7166a42..a53c41c4c4f7d1fe52f95a2cab8784a
> 938b3820b 100644
> --- a/drivers/net/ethernet/intel/e1000/e1000_main.c
> +++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
> @@ -5257,9 +5257,13 @@ static void e1000_netpoll(struct net_device
> *netdev)
>  {
>         struct e1000_adapter *adapter = netdev_priv(netdev);
>  
> -       disable_irq(adapter->pdev->irq);
> -       e1000_intr(adapter->pdev->irq, netdev);
> -       enable_irq(adapter->pdev->irq);
> +       if (napi_schedule_prep(&adapter->napi)) {
> +               adapter->total_tx_bytes = 0;
> +               adapter->total_tx_packets = 0;
> +               adapter->total_rx_bytes = 0;
> +               adapter->total_rx_packets = 0;
> +               __napi_schedule(&adapter->napi);
> +       }
>  }
>  #endif
>  

Since this fixes the issue Fengguang saw, will you be submitting a formal
patch Eric? (please) I can get this queued up for Dave's net tree as soon
as I receive the formal patch.
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