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[209.132.180.67]) by mx.google.com with ESMTP id e2-v6si13593800pgq.382.2018.06.19.00.39.11; Tue, 19 Jun 2018 00:39:25 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2017-10-26 header.b=WNujjurJ; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965771AbeFSHh7 (ORCPT + 99 others); Tue, 19 Jun 2018 03:37:59 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:59098 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S937104AbeFSHh5 (ORCPT ); Tue, 19 Jun 2018 03:37:57 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w5J7Xrbj077195; Tue, 19 Jun 2018 07:37:25 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=corp-2017-10-26; bh=oLmrTfFF5ibT/EKby+VelNTtxCNFqbuff6j6ZbTJ4lw=; b=WNujjurJALhfNvVcyK5ffWsKLxm11VuEHBE+PKiiWmnCEL4ZgzDoPc8kMqV0YlO8Q0u+ +4R0581aVNWlE9G1hl6i3eY/fu99+lhKCPDSjkQJVAlOYLoUhvnHNgtsLIZ8Jt9qhCb5 gYxshEd4REQwAaweCHUzFe2+HelgXFMV8zryLXfq5fO9WNj96MP99HRNEzULQLcUYY00 Pj+pHqw8ji+YuNwkH325HOJlEJGsbUzgklXTR0U27gGfYliCFj9mpIsTY5zF02kA40Gv YbWSdbaXwfFCtBkX9lvEd+5IGHf1zYGXrUYvJJIvPZSWQzLB1jvU+DvI9GR8niLvwECj Qg== Received: from userv0021.oracle.com (userv0021.oracle.com [156.151.31.71]) by aserp2120.oracle.com with ESMTP id 2jmtgwpvv5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 19 Jun 2018 07:37:25 +0000 Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by userv0021.oracle.com (8.14.4/8.14.4) with ESMTP id w5J7bOr0008217 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 19 Jun 2018 07:37:24 GMT Received: from abhmp0007.oracle.com (abhmp0007.oracle.com [141.146.116.13]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id w5J7bMkR032168; Tue, 19 Jun 2018 07:37:23 GMT Received: from mwanda (/197.157.34.185) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 19 Jun 2018 00:37:21 -0700 Date: Tue, 19 Jun 2018 10:37:09 +0300 From: Dan Carpenter To: Nicholas Mc Guire Cc: Greg Kroah-Hartman , devel@driverdev.osuosl.org, Nathan Chancellor , linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: Re: [PATCH] staging: board: drop refcount in success case Message-ID: <20180619073709.schatjhjoitfc3fs@mwanda> References: <1529347999-9316-1-git-send-email-hofrat@osadl.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1529347999-9316-1-git-send-email-hofrat@osadl.org> User-Agent: NeoMutt/20170609 (1.8.3) X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8928 signatures=668702 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1805220000 definitions=main-1806190088 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jun 18, 2018 at 08:53:19PM +0200, Nicholas Mc Guire wrote: > The call to of_find_compatible_node() returns irqc_node with refcount > incremented thus it must be explicitly decremented here after it was > checked for non-NULL. > > Signed-off-by: Nicholas Mc Guire > Fixes: commit 72ee8626eeb1 ("staging: board: Add support for translating hwirq to virq numbers") > --- > > Problem located with an experimental coccinelle script > > Patch was compile-tested with: x86_64_defconfig + STAGING=y, STAGING_BOARD=y > > Patch is against 4.18-rc1 (localversion-next is next-20180618) > > drivers/staging/board/board.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/staging/board/board.c b/drivers/staging/board/board.c > index cb6feb3..8ee48e5 100644 > --- a/drivers/staging/board/board.c > +++ b/drivers/staging/board/board.c > @@ -64,12 +64,13 @@ int __init board_staging_gic_setup_xlate(const char *gic_match, > irqc_node = of_find_compatible_node(NULL, NULL, gic_match); > > WARN_ON(!irqc_node); > if (!irqc_node) > return -ENOENT; > > + of_node_put(irqc_node); I don't feel like this is the right thing... We should keep the reference until we're done with it. Which apparently is never? But I don't know the code at all so I could be wrong. regards, dan carpenter