From patchwork Tue Oct 10 03:32:53 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cyril Bur X-Patchwork-Id: 823684 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3yB2tp4LRSz9s4q for ; Tue, 10 Oct 2017 14:40:18 +1100 (AEDT) Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 3yB2tm6Kr0zDr9R for ; Tue, 10 Oct 2017 14:40:16 +1100 (AEDT) X-Original-To: linuxppc-dev@lists.ozlabs.org Delivered-To: linuxppc-dev@lists.ozlabs.org Authentication-Results: ozlabs.org; spf=softfail (mailfrom) smtp.mailfrom=gmail.com (client-ip=148.163.158.5; helo=mx0a-001b2d01.pphosted.com; envelope-from=cyrilbur@gmail.com; receiver=) Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3yB2kz2XN5zDr4x for ; Tue, 10 Oct 2017 14:33:29 +1100 (AEDT) Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v9A3TEMl114611 for ; Mon, 9 Oct 2017 23:33:27 -0400 Received: from e06smtp10.uk.ibm.com (e06smtp10.uk.ibm.com [195.75.94.106]) by mx0b-001b2d01.pphosted.com with ESMTP id 2dgh9fvt1u-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Mon, 09 Oct 2017 23:33:26 -0400 Received: from localhost by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 10 Oct 2017 04:33:25 +0100 Received: from b06cxnps4074.portsmouth.uk.ibm.com (9.149.109.196) by e06smtp10.uk.ibm.com (192.168.101.140) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Tue, 10 Oct 2017 04:33:23 +0100 Received: from d23av06.au.ibm.com (d23av06.au.ibm.com [9.190.235.151]) by b06cxnps4074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v9A3XLJb4784294 for ; Tue, 10 Oct 2017 03:33:22 GMT Received: from d23av06.au.ibm.com (localhost [127.0.0.1]) by d23av06.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id v9A3XKGu010290 for ; Tue, 10 Oct 2017 14:33:20 +1100 Received: from ozlabs.au.ibm.com (ozlabs.au.ibm.com [9.192.253.14]) by d23av06.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id v9A3XJvZ010286; Tue, 10 Oct 2017 14:33:20 +1100 Received: from camb691.au.ibm.com (camb691.au.ibm.com [9.192.250.228]) (using TLSv1.2 with cipher DHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 9DBE8A0124; Tue, 10 Oct 2017 14:33:19 +1100 (AEDT) From: Cyril Bur To: linux-mtd@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, stewart@linux.vnet.ibm.com Subject: [PATCH v4 01/10] mtd: powernv_flash: Use WARN_ON_ONCE() rather than BUG_ON() Date: Tue, 10 Oct 2017 14:32:53 +1100 X-Mailer: git-send-email 2.14.2 In-Reply-To: <20171010033302.20854-1-cyrilbur@gmail.com> References: <20171010033302.20854-1-cyrilbur@gmail.com> X-TM-AS-MML: disable x-cbid: 17101003-0040-0000-0000-000003E12376 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17101003-0041-0000-0000-000025E32533 Message-Id: <20171010033302.20854-2-cyrilbur@gmail.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-10-09_07:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000 definitions=main-1710100050 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.24 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: boris.brezillon@free-electrons.com, computersforpeace@gmail.com, dwmw2@infradead.org, sjitindarsingh@gmail.com Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" BUG_ON() should be reserved in situations where we can not longer guarantee the integrity of the system. In the case where powernv_flash_async_op() receives an impossible op, we can still guarantee the integrity of the system. Signed-off-by: Cyril Bur Acked-by: Boris Brezillon --- drivers/mtd/devices/powernv_flash.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/devices/powernv_flash.c b/drivers/mtd/devices/powernv_flash.c index f5396f26ddb4..f9ec38281ff2 100644 --- a/drivers/mtd/devices/powernv_flash.c +++ b/drivers/mtd/devices/powernv_flash.c @@ -78,7 +78,9 @@ static int powernv_flash_async_op(struct mtd_info *mtd, enum flash_op op, rc = opal_flash_erase(info->id, offset, len, token); break; default: - BUG_ON(1); + WARN_ON_ONCE(1); + opal_async_release_token(token); + return -EIO; } if (rc != OPAL_ASYNC_COMPLETION) {