From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e39.co.us.ibm.com (e39.co.us.ibm.com [32.97.110.160]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 8443C1A0A24 for ; Fri, 25 Sep 2015 05:38:26 +1000 (AEST) Received: from localhost by e39.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 24 Sep 2015 13:38:24 -0600 Received: from b03cxnp08025.gho.boulder.ibm.com (b03cxnp08025.gho.boulder.ibm.com [9.17.130.17]) by d03dlp03.boulder.ibm.com (Postfix) with ESMTP id AC40119D8026 for ; Thu, 24 Sep 2015 13:29:14 -0600 (MDT) Received: from d03av03.boulder.ibm.com (d03av03.boulder.ibm.com [9.17.195.169]) by b03cxnp08025.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id t8OJbAq843057346 for ; Thu, 24 Sep 2015 12:37:10 -0700 Received: from d03av03.boulder.ibm.com (localhost [127.0.0.1]) by d03av03.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id t8OJcIaA010610 for ; Thu, 24 Sep 2015 13:38:21 -0600 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 Cc: Michael Neuling , linuxppc-dev@lists.ozlabs.org, Manoj Kumar , "Manoj N. Kumar" Subject: [PATCH v3 03/32] cxlflash: Fix read capacity timeout Date: Thu, 24 Sep 2015 14:37:43 -0500 Message-Id: <1443123463-16617-1-git-send-email-mrochs@linux.vnet.ibm.com> In-Reply-To: <1443123193-16498-1-git-send-email-mrochs@linux.vnet.ibm.com> References: <1443123193-16498-1-git-send-email-mrochs@linux.vnet.ibm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Manoj Kumar The timeout value for read capacity is too small. Certain devices may take longer to respond and thus the command may prematurely timeout. Additionally the literal used for the timeout is stale. Update the timeout to 30 seconds (matches the value used in sd.c) and rework the timeout literal to a more appropriate description. Signed-off-by: Matthew R. Ochs Signed-off-by: Manoj N. Kumar Reviewed-by: Brian King --- drivers/scsi/cxlflash/superpipe.c | 9 ++++----- drivers/scsi/cxlflash/superpipe.h | 2 +- drivers/scsi/cxlflash/vlun.c | 4 ++-- 3 files changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/cxlflash/superpipe.c b/drivers/scsi/cxlflash/superpipe.c index 4db15a4..4e44a48 100644 --- a/drivers/scsi/cxlflash/superpipe.c +++ b/drivers/scsi/cxlflash/superpipe.c @@ -296,7 +296,7 @@ static int read_cap16(struct scsi_device *sdev, struct llun_info *lli) int rc = 0; int result = 0; int retry_cnt = 0; - u32 tout = (MC_DISCOVERY_TIMEOUT * HZ); + u32 to = CMD_TIMEOUT * HZ; retry: cmd_buf = kzalloc(CMD_BUFSIZE, GFP_KERNEL); @@ -315,8 +315,7 @@ retry: retry_cnt ? "re" : "", scsi_cmd[0]); result = scsi_execute(sdev, scsi_cmd, DMA_FROM_DEVICE, cmd_buf, - CMD_BUFSIZE, sense_buf, tout, CMD_RETRIES, - 0, NULL); + CMD_BUFSIZE, sense_buf, to, CMD_RETRIES, 0, NULL); if (driver_byte(result) == DRIVER_SENSE) { result &= ~(0xFF<<24); /* DRIVER_SENSE is not an error */ @@ -1376,8 +1375,8 @@ 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 * MAX_SECTOR_UNIT) / - gli->blk_len; + attach->max_xfer = sdev->host->max_sectors * MAX_SECTOR_UNIT; + attach->max_xfer /= gli->blk_len; out: attach->adap_fd = fd; diff --git a/drivers/scsi/cxlflash/superpipe.h b/drivers/scsi/cxlflash/superpipe.h index 3f7856b..fffb179 100644 --- a/drivers/scsi/cxlflash/superpipe.h +++ b/drivers/scsi/cxlflash/superpipe.h @@ -28,7 +28,7 @@ extern struct cxlflash_global global; */ #define MC_CHUNK_SIZE (1 << MC_RHT_NMASK) /* in LBAs */ -#define MC_DISCOVERY_TIMEOUT 5 /* 5 secs */ +#define CMD_TIMEOUT 30 /* 30 secs */ #define CMD_RETRIES 5 /* 5 retries for scsi_execute */ #define MAX_SECTOR_UNIT 512 /* max_sector is in 512 byte multiples */ diff --git a/drivers/scsi/cxlflash/vlun.c b/drivers/scsi/cxlflash/vlun.c index 6d6608b..68994c4 100644 --- a/drivers/scsi/cxlflash/vlun.c +++ b/drivers/scsi/cxlflash/vlun.c @@ -414,7 +414,7 @@ static int write_same16(struct scsi_device *sdev, int ws_limit = SISLITE_MAX_WS_BLOCKS; u64 offset = lba; int left = nblks; - u32 tout = sdev->request_queue->rq_timeout; + u32 to = sdev->request_queue->rq_timeout; struct cxlflash_cfg *cfg = (struct cxlflash_cfg *)sdev->host->hostdata; struct device *dev = &cfg->dev->dev; @@ -434,7 +434,7 @@ 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, CMD_RETRIES, + CMD_BUFSIZE, sense_buf, to, CMD_RETRIES, 0, NULL); if (result) { dev_err_ratelimited(dev, "%s: command failed for " -- 2.1.0