From patchwork Sun Sep 24 07:02:35 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 9967767 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 4ECD56020C for ; Sun, 24 Sep 2017 07:03:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 423B321C9A for ; Sun, 24 Sep 2017 07:03:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3703228478; Sun, 24 Sep 2017 07:03:01 +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=unavailable 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 E9DBE21C9A for ; Sun, 24 Sep 2017 07:03:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751828AbdIXHCy (ORCPT ); Sun, 24 Sep 2017 03:02:54 -0400 Received: from esa5.hgst.iphmx.com ([216.71.153.144]:15494 "EHLO esa5.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751782AbdIXHCx (ORCPT ); Sun, 24 Sep 2017 03:02:53 -0400 X-IronPort-AV: E=Sophos;i="5.42,431,1500912000"; d="scan'208";a="53745287" Received: from sjappemgw12.hgst.com (HELO sjappemgw11.hgst.com) ([199.255.44.66]) by ob1.hgst.iphmx.com with ESMTP; 24 Sep 2017 15:02:54 +0800 Received: from washi.fujisawa.hgst.com ([10.149.53.254]) by sjappemgw11.hgst.com with ESMTP; 24 Sep 2017 00:02:53 -0700 From: Damien Le Moal To: linux-scsi@vger.kernel.org, "Martin K . Petersen" , linux-block@vger.kernel.org, Jens Axboe Cc: Christoph Hellwig , Bart Van Assche Subject: [PATCH V4 04/16] scsi: sd_zbc: Use well defined macros Date: Sun, 24 Sep 2017 16:02:35 +0900 Message-Id: <20170924070247.25560-5-damien.lemoal@wdc.com> X-Mailer: git-send-email 2.13.5 In-Reply-To: <20170924070247.25560-1-damien.lemoal@wdc.com> References: <20170924070247.25560-1-damien.lemoal@wdc.com> Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP instead of open coding, use the min() macro to calculate a report zones reply buffer length in sd_zbc_check_zone_size() and the round_up() macro for calculating the number of zones in sd_zbc_setup(). No functional change is introduced by this patch. Signed-off-by: Damien Le Moal Reviewed-by: Johannes Thumshirn Reviewed-by: Bart Van Assche Reviewed-by: Christoph Hellwig --- drivers/scsi/sd_zbc.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c index 7dbaf920679e..bbad851c1789 100644 --- a/drivers/scsi/sd_zbc.c +++ b/drivers/scsi/sd_zbc.c @@ -475,7 +475,7 @@ static int sd_zbc_check_capacity(struct scsi_disk *sdkp, unsigned char *buf) return 0; } -#define SD_ZBC_BUF_SIZE 131072 +#define SD_ZBC_BUF_SIZE 131072U /** * sd_zbc_check_zone_size - Check the device zone sizes @@ -526,10 +526,7 @@ static int sd_zbc_check_zone_size(struct scsi_disk *sdkp) /* Parse REPORT ZONES header */ list_length = get_unaligned_be32(&buf[0]) + 64; rec = buf + 64; - if (list_length < SD_ZBC_BUF_SIZE) - buf_len = list_length; - else - buf_len = SD_ZBC_BUF_SIZE; + buf_len = min(list_length, SD_ZBC_BUF_SIZE); /* Parse zone descriptors */ while (rec < buf + buf_len) { @@ -599,9 +596,8 @@ static int sd_zbc_setup(struct scsi_disk *sdkp) /* chunk_sectors indicates the zone size */ blk_queue_chunk_sectors(sdkp->disk->queue, logical_to_sectors(sdkp->device, sdkp->zone_blocks)); - sdkp->nr_zones = sdkp->capacity >> sdkp->zone_shift; - if (sdkp->capacity & (sdkp->zone_blocks - 1)) - sdkp->nr_zones++; + sdkp->nr_zones = + round_up(sdkp->capacity, sdkp->zone_blocks) >> sdkp->zone_shift; if (!sdkp->zones_wlock) { sdkp->zones_wlock = kcalloc(BITS_TO_LONGS(sdkp->nr_zones),