ps3disk: dequeue in-flight request

Other than in issue error paths, ps3disk always completely finishes
fetched requests.  With full completion on error paths, it can be
easily converted to dequeueing model.

* After L1 r/w call failure, ps3disk_submit_request_sg() now fails the
  whole request.  Issue failure isn't likely to benefit from partial
  retry anyway and ps3disk uses full failure in completion error path
  too, so I don't think this amounts to any meaningful functionality
  loss.

* flush completion is converted to _all for consistency.  It doesn't
  make any functional difference.

[ Impact: dequeue in-flight request ]
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

drivers/block/ps3disk.c

@@ -157,7 +157,7 @@ static int ps3disk_submit_request_sg(struct ps3_storage_device *dev,
 	if (res) {
 		dev_err(&dev->sbd.core, "%s:%u: %s failed %d\n", __func__,
 			__LINE__, op, res);
-		__blk_end_request_cur(req, -EIO);
+		__blk_end_request_all(req, -EIO);
 		return 0;
 	}
 
@@ -179,7 +179,7 @@ static int ps3disk_submit_flush_request(struct ps3_storage_device *dev,
 	if (res) {
 		dev_err(&dev->sbd.core, "%s:%u: sync cache failed 0x%llx\n",
 			__func__, __LINE__, res);
-		__blk_end_request_cur(req, -EIO);
+		__blk_end_request_all(req, -EIO);
 		return 0;
 	}
 
@@ -195,6 +195,8 @@ static void ps3disk_do_request(struct ps3_storage_device *dev,
 	dev_dbg(&dev->sbd.core, "%s:%u\n", __func__, __LINE__);
 
 	while ((req = elv_next_request(q))) {
+		blkdev_dequeue_request(req);
+
 		if (blk_fs_request(req)) {
 			if (ps3disk_submit_request_sg(dev, req))
 				break;
@@ -204,7 +206,7 @@ static void ps3disk_do_request(struct ps3_storage_device *dev,
 				break;
 		} else {
 			blk_dump_rq_flags(req, DEVICE_NAME " bad request");
-			__blk_end_request_cur(req, -EIO);
+			__blk_end_request_all(req, -EIO);
 			continue;
 		}
 	}