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

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Message-ID: <alpine.DEB.2.22.394.2007291836240.2459@hadrien>
Date:   Wed, 29 Jul 2020 18:37:02 +0200 (CEST)
From:   Julia Lawall <julia.lawall@...ia.fr>
To:     Shannon Nelson <snelson@...sando.io>
cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: drivers/net/ethernet/pensando/ionic/ionic_lif.c:2004:3-9: preceding
 lock on line 1998 (fwd)

Hello,

It looks like an unlock may be wanted on line 2004.

julia

---------- 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

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