block: document the blk_eh_timer_return values

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index d838a89639f22101d1d2993d48ac0c633e4af833..9f06b29adaa4db235a7ea4de051e23cb65051c4a 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -326,8 +326,8 @@ typedef int (init_rq_fn)(struct request_queue *, struct request *, gfp_t);
 typedef void (exit_rq_fn)(struct request_queue *, struct request *);
 
 enum blk_eh_timer_return {
-       BLK_EH_DONE,
-       BLK_EH_RESET_TIMER,
+       BLK_EH_DONE,            /* drivers has completed the command */
+       BLK_EH_RESET_TIMER,     /* reset timer and try again */
 };
 
 typedef enum blk_eh_timer_return (rq_timed_out_fn)(struct request *);