From ef10b16948bc0db51a0140be5109ad73b170a011 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Sun, 26 Apr 2015 11:52:46 -0700 Subject: scsi_scan: fix queue depth initialisation problem Currently we blindly use the value of cmd_per_lun as the initial setting for queue_depth. This fails miserably (hangs the system) if it is zero, which is the default value for anything uninitialised in the template. The net result is that every host template has to set a value for cmd_per_lun. Instead, use a default value of 1 if the actual value is unset. This should pave the way for removing cmd_per_lun from all the templates and eventually from SCSI itself. Signed-off-by: James Bottomley --- drivers/scsi/scsi_scan.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/scsi/scsi_scan.c') diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c index 6efab1c455e1..53a2e3391454 100644 --- a/drivers/scsi/scsi_scan.c +++ b/drivers/scsi/scsi_scan.c @@ -280,7 +280,8 @@ static struct scsi_device *scsi_alloc_sdev(struct scsi_target *starget, sdev->host->cmd_per_lun, shost->bqt, shost->hostt->tag_alloc_policy); } - scsi_change_queue_depth(sdev, sdev->host->cmd_per_lun); + scsi_change_queue_depth(sdev, sdev->host->cmd_per_lun ? + sdev->host->cmd_per_lun : 1); scsi_sysfs_device_initialize(sdev); -- cgit v1.2.3-59-g8ed1b