linux-kernel - Re: drivers/net/ethernet/pensando/ionic/ionic_lif.c:2004:3-9: preceding lock on line 1998 (fwd)

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Message-ID: <cb1aa251-b3b4-1286-760e-58db5f63f422@pensando.io>
Date:   Wed, 29 Jul 2020 09:45:04 -0700
From:   Shannon Nelson <snelson@...sando.io>
To:     Julia Lawall <julia.lawall@...ia.fr>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: Re: drivers/net/ethernet/pensando/ionic/ionic_lif.c:2004:3-9:
 preceding lock on line 1998 (fwd)

On 7/29/20 9:37 AM, Julia Lawall wrote:
> Hello,
>
> It looks like an unlock may be wanted on line 2004.
>
> julia

Thanks for catching that, Julia.  I'll follow up shortly.

sln

>
> ---------- Forwarded message ----------
> Date: Thu, 30 Jul 2020 00:08:47 +0800
> From: kernel test robot <lkp@...el.com>
> To: kbuild@...ts.01.org
> Cc: lkp@...el.com, Julia Lawall <julia.lawall@...6.fr>
> Subject: drivers/net/ethernet/pensando/ionic/ionic_lif.c:2004:3-9: preceding
>      lock on line 1998
>
> CC: kbuild-all@...ts.01.org
> CC: linux-kernel@...r.kernel.org
> TO: Shannon Nelson <snelson@...sando.io>
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   6ba1b005ffc388c2aeaddae20da29e4810dea298
> commit: 0925e9db4dc86daf666d9a3d53c7db14ac6d5d00 ionic: use mutex to protect queue operations
> date:   9 days ago
> :::::: branch date: 21 hours ago
> :::::: commit date: 9 days ago
> config: powerpc-randconfig-c004-20200728 (attached as .config)
> compiler: powerpc64-linux-gcc (GCC) 9.3.0
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> Reported-by: Julia Lawall <julia.lawall@...6.fr>
>
>
> coccinelle warnings: (new ones prefixed by >>)
>
>>> drivers/net/ethernet/pensando/ionic/ionic_lif.c:2004:3-9: preceding lock on line 1998
> # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0925e9db4dc86daf666d9a3d53c7db14ac6d5d00
> git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> git remote update linus
> git checkout 0925e9db4dc86daf666d9a3d53c7db14ac6d5d00
> vim +2004 drivers/net/ethernet/pensando/ionic/ionic_lif.c
>
> beead698b1736df Shannon Nelson 2019-09-03  1992
> 086c18f2452d002 Shannon Nelson 2020-07-07  1993  int ionic_reset_queues(struct ionic_lif *lif, ionic_reset_cb cb, void *arg)
> beead698b1736df Shannon Nelson 2019-09-03  1994  {
> beead698b1736df Shannon Nelson 2019-09-03  1995  	bool running;
> beead698b1736df Shannon Nelson 2019-09-03  1996  	int err = 0;
> beead698b1736df Shannon Nelson 2019-09-03  1997
> 0925e9db4dc86da Shannon Nelson 2020-07-20 @1998  	mutex_lock(&lif->queue_lock);
> beead698b1736df Shannon Nelson 2019-09-03  1999  	running = netif_running(lif->netdev);
> b59eabd23ee53e8 Shannon Nelson 2020-06-18  2000  	if (running) {
> b59eabd23ee53e8 Shannon Nelson 2020-06-18  2001  		netif_device_detach(lif->netdev);
> beead698b1736df Shannon Nelson 2019-09-03  2002  		err = ionic_stop(lif->netdev);
> 086c18f2452d002 Shannon Nelson 2020-07-07  2003  		if (err)
> 0925e9db4dc86da Shannon Nelson 2020-07-20 @2004  			return err;
> b59eabd23ee53e8 Shannon Nelson 2020-06-18  2005  	}
> 086c18f2452d002 Shannon Nelson 2020-07-07  2006
> 086c18f2452d002 Shannon Nelson 2020-07-07  2007  	if (cb)
> 086c18f2452d002 Shannon Nelson 2020-07-07  2008  		cb(lif, arg);
> 086c18f2452d002 Shannon Nelson 2020-07-07  2009
> 086c18f2452d002 Shannon Nelson 2020-07-07  2010  	if (running) {
> 086c18f2452d002 Shannon Nelson 2020-07-07  2011  		err = ionic_open(lif->netdev);
> b59eabd23ee53e8 Shannon Nelson 2020-06-18  2012  		netif_device_attach(lif->netdev);
> b59eabd23ee53e8 Shannon Nelson 2020-06-18  2013  	}
> 0925e9db4dc86da Shannon Nelson 2020-07-20  2014  	mutex_unlock(&lif->queue_lock);
> beead698b1736df Shannon Nelson 2019-09-03  2015
> beead698b1736df Shannon Nelson 2019-09-03  2016  	return err;
> beead698b1736df Shannon Nelson 2019-09-03  2017  }
> beead698b1736df Shannon Nelson 2019-09-03  2018
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org