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

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Date:	Thu, 28 Jul 2016 05:46:39 -0400
From:	Valdis.Kletnieks@...edu
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	nick <xerofoify@...il.com>, Fengguang Wu <fengguang.wu@...el.com>,
	Eric Dumazet <eric.dumazet@...il.com>,
	LKML <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org,
	Satyam Sharma <satyam@...radead.org>,
	intel-wired-lan@...ts.osuosl.org,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	Ye Xiaolong <xiaolong.ye@...el.com>
Subject: Re: [e1000_netpoll] BUG: sleeping function called from invalid context at kernel/irq/manage.c:110

On Thu, 28 Jul 2016 09:45:12 +0200, Thomas Gleixner said:
> On Tue, 26 Jul 2016, nick wrote:
> > diff --git a/drivers/net/ethernet/intel/e1000/e1000_main.c b/drivers/net/ethernet/intel/e1000/e1000_main.c
> > index f42129d..e1830af 100644
> > --- a/drivers/net/ethernet/intel/e1000/e1000_main.c
> > +++ b/drivers/net/ethernet/intel/e1000/e1000_main.c
> > @@ -3797,7 +3797,7 @@ static irqreturn_t e1000_intr(int irq, void *data)
> >  		hw->get_link_status = 1;
> >  		/* guard against interrupt when we're going down */
> >  		if (!test_bit(__E1000_DOWN, &adapter->flags))
> > -			schedule_delayed_work(&adapter->watchdog_task, 1);
> > +			mod_work(&adapter->watchdog_task, jiffies + 1);
>
> And that's not even funny anymore. Are you using a random generator to create
> these patches?

At some point, we need to decide if the occasional accidentally-correct
trivial patch from Nick is worth all the wasted maintainer time.


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