[PATCH] libata-hp-prep: update ata_scsi_find_dev() and friends
Separate out ata_find_dev() and __ata_scsi_find_dev() from
ata_scsi_find_dev(). These will be used by later hotplug
implementation.
Signed-off-by: Tejun Heo <htejun@gmail.com>
diff --git a/drivers/scsi/libata-scsi.c b/drivers/scsi/libata-scsi.c
index 9e5cb9f..b45b8b3 100644
--- a/drivers/scsi/libata-scsi.c
+++ b/drivers/scsi/libata-scsi.c
@@ -52,8 +52,12 @@
#define SECTOR_SIZE 512
typedef unsigned int (*ata_xlat_func_t)(struct ata_queued_cmd *qc, const u8 *scsicmd);
-static struct ata_device *
-ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev);
+
+static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
+ const struct scsi_device *scsidev);
+static struct ata_device * ata_scsi_find_dev(struct ata_port *ap,
+ const struct scsi_device *scsidev);
+
#define RW_RECOVERY_MPAGE 0x1
#define RW_RECOVERY_MPAGE_LEN 12
@@ -2308,6 +2312,23 @@
return 0;
}
+static struct ata_device * ata_find_dev(struct ata_port *ap, int id)
+{
+ if (likely(id < ATA_MAX_DEVICES))
+ return &ap->device[id];
+ return NULL;
+}
+
+static struct ata_device * __ata_scsi_find_dev(struct ata_port *ap,
+ const struct scsi_device *scsidev)
+{
+ /* skip commands not addressed to targets we simulate */
+ if (unlikely(scsidev->channel || scsidev->lun))
+ return NULL;
+
+ return ata_find_dev(ap, scsidev->id);
+}
+
/**
* ata_scsi_find_dev - lookup ata_device from scsi_cmnd
* @ap: ATA port to which the device is attached
@@ -2324,23 +2345,12 @@
* RETURNS:
* Associated ATA device, or %NULL if not found.
*/
-
static struct ata_device *
ata_scsi_find_dev(struct ata_port *ap, const struct scsi_device *scsidev)
{
- struct ata_device *dev;
+ struct ata_device *dev = __ata_scsi_find_dev(ap, scsidev);
- /* skip commands not addressed to targets we simulate */
- if (likely(scsidev->id < ATA_MAX_DEVICES))
- dev = &ap->device[scsidev->id];
- else
- return NULL;
-
- if (unlikely((scsidev->channel != 0) ||
- (scsidev->lun != 0)))
- return NULL;
-
- if (unlikely(!ata_dev_enabled(dev)))
+ if (unlikely(!dev || !ata_dev_enabled(dev)))
return NULL;
if (!atapi_enabled || (ap->flags & ATA_FLAG_NO_ATAPI)) {