From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3F402C433DF for ; Mon, 24 Aug 2020 11:27:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1B2E32078A for ; Mon, 24 Aug 2020 11:27:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="wIFk6o7n" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726784AbgHXL1t (ORCPT ); Mon, 24 Aug 2020 07:27:49 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:44774 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726631AbgHXL1V (ORCPT ); Mon, 24 Aug 2020 07:27:21 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 07OBKDwV173250; Mon, 24 Aug 2020 11:27:09 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-2020-01-29; bh=c/kQiaid73GkfCTdczWEw0RoSId+E3XOoY0+VehU8DQ=; b=wIFk6o7nyQwq0H7Ud0tBD0s/nFkyOmYG38tkvigfCu91KZSmIdhnWEbffaZXnn3VNg26 5bgnPGEcqTu0t7cVSyjuQo3+97KQh6W5KTuTJ7LywL6gAkbdQ3ZQQVwhbaoJeHZWuaEP 0ZMS3Z8orWMdfyUqlCmLpm/LjuwlVK2NmqfEyUUxf3BcQBMbMxuEpu7kXXLVWv2inf/f e7enbRvy5rDI8OwLfhbbbu/FMxe5OUAe3zPdUUK1YmbRXjplWbFVEE2Hz9714ktc2+hi Mll0PFS42KEu2CKV1iSK3jeYV/j32eMpDuQ+mQBwOT4yUeOTTzFRhAA+3RA7fqXxiuLV Uw== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by aserp2120.oracle.com with ESMTP id 333dbrkyuw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 24 Aug 2020 11:27:09 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 07OBK8M7152312; Mon, 24 Aug 2020 11:25:09 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3020.oracle.com with ESMTP id 333ru4h5tu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 24 Aug 2020 11:25:08 +0000 Received: from abhmp0020.oracle.com (abhmp0020.oracle.com [141.146.116.26]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 07OBP7u6001496; Mon, 24 Aug 2020 11:25:08 GMT Received: from kadam (/41.57.98.10) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Mon, 24 Aug 2020 04:25:07 -0700 Date: Mon, 24 Aug 2020 14:24:57 +0300 From: Dan Carpenter To: Randy Dunlap Cc: Tomer Samara , Greg Kroah-Hartman , devel@driverdev.osuosl.org, Todd Kjos , Suren Baghdasaryan , Riley Andrews , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Hridya Valsaraju , Arve =?iso-8859-1?B?SGr4bm5lduVn?= , Joel Fernandes , Laura Abbott , Martijn Coenen , Sumit Semwal , Christian Brauner Subject: Re: [PATCH v4 2/2] staging: android: Remove BUG from ion_system_heap.c Message-ID: <20200824112457.GI1793@kadam> References: <3eba90dc-128f-49da-41a6-81494653d535@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3eba90dc-128f-49da-41a6-81494653d535@infradead.org> User-Agent: Mutt/1.9.4 (2018-02-28) X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9722 signatures=668679 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=999 phishscore=0 bulkscore=0 suspectscore=0 spamscore=0 mlxscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008240090 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9722 signatures=668679 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 clxscore=1011 priorityscore=1501 impostorscore=0 phishscore=0 malwarescore=0 mlxlogscore=999 spamscore=0 mlxscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008240090 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Aug 21, 2020 at 09:25:26AM -0700, Randy Dunlap wrote: > On 8/21/20 8:28 AM, Tomer Samara wrote: > > Remove BUG() from ion_sytem_heap.c > > > > this fix the following checkpatch issue: > > Avoid crashing the kernel - try using WARN_ON & > > recovery code ratherthan BUG() or BUG_ON(). > > > > Signed-off-by: Tomer Samara > > --- > > drivers/staging/android/ion/ion_system_heap.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/staging/android/ion/ion_system_heap.c b/drivers/staging/android/ion/ion_system_heap.c > > index eac0632ab4e8..00d6154aec34 100644 > > --- a/drivers/staging/android/ion/ion_system_heap.c > > +++ b/drivers/staging/android/ion/ion_system_heap.c > > @@ -30,7 +30,7 @@ static int order_to_index(unsigned int order) > > for (i = 0; i < NUM_ORDERS; i++) > > if (order == orders[i]) > > return i; > > - BUG(); > > + /* This is impossible. */ > > return -1; > > } > > Hi, > Please explain why this is impossible. > > If some caller calls order_to_index(5), it will return -1, yes? > I was happy enough with the comment as-is given that I suggested it. But an alternative comment could be "/* This is impossible. We always pass valid values to this function. */ regards, dan carpenter