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| author | Ming Lei <ming.lei@redhat.com> | 2021-01-22 03:33:15 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-03-04 23:37:00 +0100 |
| commit | 8278807abd338f2246b6ae8057f2ec61a80a5614 (patch) | |
| tree | a6f22592e6418258cb86e2eff77c29959767bbba /include | |
| parent | scsi: megaraid_sas: Replace sdev_busy with local counter (diff) | |
| download | linux-8278807abd338f2246b6ae8057f2ec61a80a5614.tar.xz linux-8278807abd338f2246b6ae8057f2ec61a80a5614.zip | |
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/scsi/scsi_device.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h index 1a5c9a3df6d6..dd0b9f690a26 100644 --- a/include/scsi/scsi_device.h +++ b/include/scsi/scsi_device.h @@ -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" |