scsi: scsi_lib: rework scsi_internal_device_unblock_nowait()

Rework scsi_internal_device_unblock_nowait() into using a switch
statement. No functional changes.

Signed-off-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index f6097b8..4a295a6 100644 (file)
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -3073,19 +3073,24 @@ int scsi_internal_device_unblock_nowait(struct scsi_device *sdev,
         * Try to transition the scsi device to SDEV_RUNNING or one of the
         * offlined states and goose the device queue if successful.
         */
-       if ((sdev->sdev_state == SDEV_BLOCK) ||
-           (sdev->sdev_state == SDEV_TRANSPORT_OFFLINE))
+       switch (sdev->sdev_state) {
+       case SDEV_BLOCK:
+       case SDEV_TRANSPORT_OFFLINE:
                sdev->sdev_state = new_state;
-       else if (sdev->sdev_state == SDEV_CREATED_BLOCK) {
+               break;
+       case SDEV_CREATED_BLOCK:
                if (new_state == SDEV_TRANSPORT_OFFLINE ||
                    new_state == SDEV_OFFLINE)
                        sdev->sdev_state = new_state;
                else
                        sdev->sdev_state = SDEV_CREATED;
-       } else if (sdev->sdev_state != SDEV_CANCEL &&
-                sdev->sdev_state != SDEV_OFFLINE)
+               break;
+       case SDEV_CANCEL:
+       case SDEV_OFFLINE:
+               break;
+       default:
                return -EINVAL;
-
+       }
        scsi_start_queue(sdev);
 
        return 0;