Name
blk_queue_find_tag — 
  find a request by its tag and queue
 
Synopsis
| struct request * blk_queue_find_tag ( | struct request_queue * q, | 
|  | int tag ); | 
 
Arguments
- q
- 
     The request queue for the device
     
- tag
- 
     The tag of the request
     
Notes
   Should be used when a device returns a tag and you want to match
   it with a request.
   
   no locks need be held.