From patchwork Thu Oct 1 15:54:49 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Matthew R. 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Violators will be prosecuted; Thu, 1 Oct 2015 11:55:40 -0400 X-IBM-Helo: d01dlp03.pok.ibm.com X-IBM-MailFrom: mrochs@linux.vnet.ibm.com X-IBM-RcptTo: linuxppc-dev@lists.ozlabs.org Received: from b01cxnp23033.gho.pok.ibm.com (b01cxnp23033.gho.pok.ibm.com [9.57.198.28]) by d01dlp03.pok.ibm.com (Postfix) with ESMTP id 2432AC90045 for ; Thu, 1 Oct 2015 11:43:51 -0400 (EDT) Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by b01cxnp23033.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t91Ftdd554919296 for ; Thu, 1 Oct 2015 15:55:39 GMT Received: from d01av04.pok.ibm.com (localhost [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t91FtcvT028366 for ; Thu, 1 Oct 2015 11:55:38 -0400 Received: from p8tul1-build.aus.stglabs.ibm.com (als141206.austin.ibm.com [9.3.141.206]) by d01av04.pok.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id t91Ftabb028300; Thu, 1 Oct 2015 11:55:37 -0400 From: "Matthew R. Ochs" To: linux-scsi@vger.kernel.org, James Bottomley , "Nicholas A. Bellinger" , Brian King , Ian Munsie , Daniel Axtens , Andrew Donnellan , Tomas Henzl , David Laight Subject: [PATCH v5 02/34] cxlflash: Replace magic numbers with literals Date: Thu, 1 Oct 2015 10:54:49 -0500 Message-Id: <1443714889-11735-1-git-send-email-mrochs@linux.vnet.ibm.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1443714773-9176-1-git-send-email-mrochs@linux.vnet.ibm.com> References: <1443714773-9176-1-git-send-email-mrochs@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15100115-0045-0000-0000-000001AAA3E1 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Manoj Kumar , Michael Neuling , "Manoj N. Kumar" , linuxppc-dev@lists.ozlabs.org MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Manoj Kumar Magic numbers are not meaningful and can create confusion. As a remedy, replace them with descriptive literals. Replace 512 with literal MAX_SECTOR_UNIT. Replace 5 with literal CMD_RETRIES. Signed-off-by: Matthew R. Ochs Signed-off-by: Manoj N. Kumar Reviewed-by: Brian King Reviewed-by: Andrew Donnellan Reviewed-by: Tomas Henzl --- drivers/scsi/cxlflash/superpipe.c | 6 ++++-- drivers/scsi/cxlflash/superpipe.h | 3 +++ drivers/scsi/cxlflash/vlun.c | 3 ++- 3 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/cxlflash/superpipe.c b/drivers/scsi/cxlflash/superpipe.c index 05e0ecf..4db15a4 100644 --- a/drivers/scsi/cxlflash/superpipe.c +++ b/drivers/scsi/cxlflash/superpipe.c @@ -315,7 +315,8 @@ retry: retry_cnt ? "re" : "", scsi_cmd[0]); result = scsi_execute(sdev, scsi_cmd, DMA_FROM_DEVICE, cmd_buf, - CMD_BUFSIZE, sense_buf, tout, 5, 0, NULL); + CMD_BUFSIZE, sense_buf, tout, CMD_RETRIES, + 0, NULL); if (driver_byte(result) == DRIVER_SENSE) { result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ @@ -1375,7 +1376,8 @@ out_attach: attach->block_size = gli->blk_len; attach->mmio_size = sizeof(afu->afu_map->hosts[0].harea); attach->last_lba = gli->max_lba; - attach->max_xfer = (sdev->host->max_sectors * 512) / gli->blk_len; + attach->max_xfer = (sdev->host->max_sectors * MAX_SECTOR_UNIT) / + gli->blk_len; out: attach->adap_fd = fd; diff --git a/drivers/scsi/cxlflash/superpipe.h b/drivers/scsi/cxlflash/superpipe.h index d7dc88b..3f7856b 100644 --- a/drivers/scsi/cxlflash/superpipe.h +++ b/drivers/scsi/cxlflash/superpipe.h @@ -29,6 +29,9 @@ extern struct cxlflash_global global; #define MC_CHUNK_SIZE (1 << MC_RHT_NMASK) /* in LBAs */ #define MC_DISCOVERY_TIMEOUT 5 /* 5 secs */ +#define CMD_RETRIES 5 /* 5 retries for scsi_execute */ + +#define MAX_SECTOR_UNIT 512 /* max_sector is in 512 byte multiples */ #define CHAN2PORT(_x) ((_x) + 1) #define PORT2CHAN(_x) ((_x) - 1) diff --git a/drivers/scsi/cxlflash/vlun.c b/drivers/scsi/cxlflash/vlun.c index 6155cb1..6d6608b 100644 --- a/drivers/scsi/cxlflash/vlun.c +++ b/drivers/scsi/cxlflash/vlun.c @@ -434,7 +434,8 @@ static int write_same16(struct scsi_device *sdev, &scsi_cmd[10]); result = scsi_execute(sdev, scsi_cmd, DMA_TO_DEVICE, cmd_buf, - CMD_BUFSIZE, sense_buf, tout, 5, 0, NULL); + CMD_BUFSIZE, sense_buf, tout, CMD_RETRIES, + 0, NULL); if (result) { dev_err_ratelimited(dev, "%s: command failed for " "offset %lld result=0x%x\n",