From 3ebf203093b4ee07d62ef1a02dbbf7a293770388 Mon Sep 17 00:00:00 2001 From: Manoj Kumar Date: Wed, 21 Oct 2015 15:11:00 -0500 Subject: [PATCH] cxlflash: Replace magic numbers with literals 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 Signed-off-by: James Bottomley --- 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 f1b62ce..7df985d 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", -- 2.7.4