From patchwork Fri Aug 25 20:46:29 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bart Van Assche X-Patchwork-Id: 9922779 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0A9A960349 for ; Fri, 25 Aug 2017 20:47:37 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EFACF2844E for ; Fri, 25 Aug 2017 20:47:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E48C3284AA; Fri, 25 Aug 2017 20:47:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3E84F2844E for ; Fri, 25 Aug 2017 20:47:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932548AbdHYUrf (ORCPT ); Fri, 25 Aug 2017 16:47:35 -0400 Received: from esa3.hgst.iphmx.com ([216.71.153.141]:49042 "EHLO esa3.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932912AbdHYUrf (ORCPT ); Fri, 25 Aug 2017 16:47:35 -0400 X-IronPort-AV: E=Sophos;i="5.41,426,1498492800"; d="scan'208";a="45274905" Received: from sjappemgw12.hgst.com (HELO sjappemgw11.hgst.com) ([199.255.44.66]) by ob1.hgst.iphmx.com with ESMTP; 26 Aug 2017 04:46:49 +0800 Received: from thinkpad-bart.sdcorp.global.sandisk.com (HELO thinkpad-bart.int.fusionio.com) ([10.11.172.152]) by sjappemgw11.hgst.com with ESMTP; 25 Aug 2017 13:46:43 -0700 From: Bart Van Assche To: "Martin K . Petersen" , "James E . J . Bottomley" Cc: linux-scsi@vger.kernel.org, Bart Van Assche , Hannes Reinecke , Johannes Thumshirn Subject: [PATCH v2 03/17] Suppress gcc 7 fall-through warnings reported with W=1 Date: Fri, 25 Aug 2017 13:46:29 -0700 Message-Id: <20170825204643.25043-4-bart.vanassche@wdc.com> X-Mailer: git-send-email 2.14.1 In-Reply-To: <20170825204643.25043-1-bart.vanassche@wdc.com> References: <20170825204643.25043-1-bart.vanassche@wdc.com> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The conclusion of a recent discussion about the new warnings reported by gcc 7 is that the new warnings reported when building with W=1 should be suppressed. However, gcc 7 still warns about fall-through in switch statements when building with W=1. Suppress these warnings by annotating the SCSI core properly. See also Linus Torvalds, Lots of new warnings with gcc-7.1.1, 11 July 2017 (https://www.mail-archive.com/linux-media@vger.kernel.org/msg115428.html). References: commit bd664f6b3e37 ("disable new gcc-7.1.1 warnings for now") Signed-off-by: Bart Van Assche Reviewed-by: Christoph Hellwig Cc: Hannes Reinecke Cc: Johannes Thumshirn --- drivers/scsi/scsi_error.c | 8 +++++++- drivers/scsi/scsi_ioctl.c | 4 +++- 2 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c index ea9f40e51f68..01b2d2055edf 100644 --- a/drivers/scsi/scsi_error.c +++ b/drivers/scsi/scsi_error.c @@ -552,6 +552,7 @@ int scsi_check_sense(struct scsi_cmnd *scmd) set_host_byte(scmd, DID_ALLOC_FAILURE); return SUCCESS; } + /* FALLTHROUGH */ case COPY_ABORTED: case VOLUME_OVERFLOW: case MISCOMPARE: @@ -573,6 +574,7 @@ int scsi_check_sense(struct scsi_cmnd *scmd) return ADD_TO_MLQUEUE; else set_host_byte(scmd, DID_TARGET_FAILURE); + /* FALLTHROUGH */ case ILLEGAL_REQUEST: if (sshdr.asc == 0x20 || /* Invalid command operation code */ @@ -683,6 +685,7 @@ static int scsi_eh_completed_normally(struct scsi_cmnd *scmd) switch (status_byte(scmd->result)) { case GOOD: scsi_handle_queue_ramp_up(scmd->device); + /* FALLTHROUGH */ case COMMAND_TERMINATED: return SUCCESS; case CHECK_CONDITION: @@ -1734,6 +1737,7 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd) set_host_byte(scmd, DID_TIME_OUT); return SUCCESS; } + /* FALLTHROUGH */ case DID_NO_CONNECT: case DID_BAD_TARGET: /* @@ -1819,6 +1823,7 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd) * the case of trying to send too many commands to a * tagged queueing device. */ + /* FALLTHROUGH */ case BUSY: /* * device can't talk to us at the moment. Should only @@ -1831,6 +1836,7 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd) if (scmd->cmnd[0] == REPORT_LUNS) scmd->device->sdev_target->expecting_lun_change = 0; scsi_handle_queue_ramp_up(scmd->device); + /* FALLTHROUGH */ case COMMAND_TERMINATED: return SUCCESS; case TASK_ABORTED: @@ -2320,8 +2326,8 @@ scsi_ioctl_reset(struct scsi_device *dev, int __user *arg) rtn = scsi_try_host_reset(scmd); if (rtn == SUCCESS) break; - default: /* FALLTHROUGH */ + default: rtn = FAILED; break; } diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c index b6bf3f29a12a..0a875491f5a7 100644 --- a/drivers/scsi/scsi_ioctl.c +++ b/drivers/scsi/scsi_ioctl.c @@ -116,13 +116,15 @@ static int ioctl_internal_command(struct scsi_device *sdev, char *cmd, case NOT_READY: /* This happens if there is no disc in drive */ if (sdev->removable) break; + /* FALLTHROUGH */ case UNIT_ATTENTION: if (sdev->removable) { sdev->changed = 1; result = 0; /* This is no longer considered an error */ break; } - default: /* Fall through for non-removable media */ + /* FALLTHROUGH -- for non-removable media */ + default: sdev_printk(KERN_INFO, sdev, "ioctl_internal_command return code = %x\n", result);