cpqarray: fix iostat

cpqarray needs to call disk_stat_add() for iostat to work.
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

drivers/block/cpqarray.c

@@ -1004,6 +1004,7 @@ static inline void complete_buffers(struct bio *bio, int ok)
  */
 static inline void complete_command(cmdlist_t *cmd, int timeout)
 {
+	struct request *rq = cmd->rq;
 	int ok=1;
 	int i, ddir;
 
@@ -1035,10 +1036,16 @@ static inline void complete_command(cmdlist_t *cmd, int timeout)
                 pci_unmap_page(hba[cmd->ctlr]->pci_dev, cmd->req.sg[i].addr,
 				cmd->req.sg[i].size, ddir);
 
-	complete_buffers(cmd->rq->bio, ok);
+	complete_buffers(rq->bio, ok);
 
-        DBGPX(printk("Done with %p\n", cmd->rq););
-	end_that_request_last(cmd->rq, ok ? 1 : -EIO);
+	if (blk_fs_request(rq)) {
+		const int rw = rq_data_dir(rq);
+ 
+		disk_stat_add(rq->rq_disk, sectors[rw], rq->nr_sectors);
+	}
+
+	DBGPX(printk("Done with %p\n", rq););
+	end_that_request_last(rq, ok ? 1 : -EIO);
 }
 
 /*