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scsi: core: Add scsi_device_busy() wrapper 

Add scsi_device_busy() helper to prepare drivers for tracking device queue
depth via sbitmap_queue.

Link: https://lore.kernel.org/r/20210122023317.687987-12-ming.lei@redhat.com
Cc: Omar Sandoval <osandov@fb.com>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Sumanesh Samanta <sumanesh.samanta@broadcom.com>
Cc: Ewan D. Milne <emilne@redhat.com>
Tested-by: Sumanesh Samanta <sumanesh.samanta@broadcom.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ming Lei 2021-01-22 10:33:15 +08:00 committed by Martin K. Petersen
parent 6cb9b15238
commit 8278807abd
6 changed files with 11 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/message/fusion/mptsas.c
View File

@ -3781,7 +3781,7 @@ mptsas_send_link_status_event(struct fw_event_work *fw_event)
printk(MYIOC_s_DEBUG_FMT
"SDEV OUTSTANDING CMDS"
"%d\n", ioc->name,
atomic_read(&sdev->device_busy)));
scsi_device_busy(sdev)));
}
}

2
drivers/scsi/mpt3sas/mpt3sas_scsih.c
View File

@ -3423,7 +3423,7 @@ scsih_dev_reset(struct scsi_cmnd *scmd)
MPI2_SCSITASKMGMT_TASKTYPE_LOGICAL_UNIT_RESET, 0, 0,
tr_timeout, tr_method);
/* Check for busy commands after reset */
if (r == SUCCESS && atomic_read(&scmd->device->device_busy))
if (r == SUCCESS && scsi_device_busy(scmd->device))
r = FAILED;
out:
sdev_printk(KERN_INFO, scmd->device, "device reset: %s scmd(0x%p)\n",

4
drivers/scsi/scsi_lib.c
View File

@ -385,7 +385,7 @@ static void scsi_single_lun_run(struct scsi_device *current_sdev)
static inline bool scsi_device_is_busy(struct scsi_device *sdev)
{
if (atomic_read(&sdev->device_busy) >= sdev->queue_depth)
if (scsi_device_busy(sdev) >= sdev->queue_depth)
return true;
if (atomic_read(&sdev->device_blocked) > 0)
return true;
@ -1639,7 +1639,7 @@ static int scsi_mq_get_budget(struct request_queue *q)
* the .restarts flag, and the request queue will be run for handling
* this request, see scsi_end_request().
*/
if (unlikely(atomic_read(&sdev->device_busy) == 0 &&
if (unlikely(scsi_device_busy(sdev) == 0 &&
!scsi_device_blocked(sdev)))
blk_mq_delay_run_hw_queues(sdev->request_queue, SCSI_QUEUE_DELAY);
return -1;

2
drivers/scsi/scsi_sysfs.c
View File

@ -670,7 +670,7 @@ sdev_show_device_busy(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct scsi_device *sdev = to_scsi_device(dev);
return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy));
return snprintf(buf, 20, "%d\n", scsi_device_busy(sdev));
}
static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL);

2
drivers/scsi/sg.c
View File

@ -2503,7 +2503,7 @@ static int sg_proc_seq_show_dev(struct seq_file *s, void *v)
scsidp->id, scsidp->lun, (int) scsidp->type,
1,
(int) scsidp->queue_depth,
(int) atomic_read(&scsidp->device_busy),
(int) scsi_device_busy(scsidp),
(int) scsi_device_online(scsidp));
}
read_unlock_irqrestore(&sg_index_lock, iflags);

5
include/scsi/scsi_device.h
View File

@ -590,6 +590,11 @@ static inline int scsi_device_supports_vpd(struct scsi_device *sdev)
return 0;
}
static inline int scsi_device_busy(struct scsi_device *sdev)
{
return atomic_read(&sdev->device_busy);
}
#define MODULE_ALIAS_SCSI_DEVICE(type) \
MODULE_ALIAS("scsi:t-" __stringify(type) "*")
#define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x"