cciss: use schedule_timeout_interruptible()

Use schedule_timeout_interruptible() instead of open-coding the set and
schedule parts.

Cc: Mike Miller <mikem@beardog.cca.cpqcorp.net>
Cc: Stephen M. Cameron <scameron@beardog.cca.cpqcorp.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NJens Axboe <jens.axboe@oracle.com>

drivers/block/cciss_scsi.c

@@ -1608,8 +1608,7 @@ static int wait_for_device_to_become_ready(ctlr_info_t *h,
 		/* Wait for a bit.  do this first, because if we send
 		 * the TUR right away, the reset will just abort it.
 		 */
-		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(waittime);
+		schedule_timeout_interruptible(waittime);
 		count++;
 
 		/* Increase wait time with each try, up to a point. */