linux-kernel - Re: 4.9-rc7: (forcedeth?) BUG: sleeping function called from invalid context at kernel/irq/manage.c:110

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Message-ID: <1480449495.18162.152.camel@edumazet-glaptop3.roam.corp.google.com>
Date:   Tue, 29 Nov 2016 11:58:15 -0800
From:   Eric Dumazet <eric.dumazet@...il.com>
To:     Meelis Roos <mroos@...ux.ee>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux Kernel list <linux-kernel@...r.kernel.org>,
        netdev@...r.kernel.org
Subject: Re: 4.9-rc7: (forcedeth?) BUG: sleeping function called from
 invalid context at kernel/irq/manage.c:110

On Tue, 2016-11-29 at 23:16 +0200, Meelis Roos wrote:
> > On Tue, Nov 29, 2016 at 12:26 PM, Meelis Roos <mroos@...ux.ee> wrote:
> > > This is 4.9-rc7 on Sun Ultra 20 (Opteron 175 on NVidia chipset PC with
> > > NVidia ethernet).
> > >
> > > BUG: sleeping function called from invalid context at kernel/irq/manage.c:110
> > 
> > Hmm. No changes in either forcedeth or in the synchronize_irq() debugging.
> [...]
> > But none of this looks new. I don't see _anything_ in any of these
> > areas that has changed since 4.8.
> > 
> > Which is why I suspect you changed something in your setup wrt
> > netconsole or your kernel config?
> 
> No changes that I could see. Only answered oldconfig questions, diff 
> below. /etc/default/grub is from May so not changed recently. Just 
> verified that 4.8.0 dmesg did not contain these warnings.
> 
> Conf diff and current config are below:

nv_do_nic_poll() is simply buggy and needs a fix.

synchronize_irq() can sleep.