[045/103] virtio-blk: fix request leak.

[Greg KH]

2.6.35-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Mike Snitzer <snitzer@xxxxxxxxxx>

commit e4c4776dea9fd0295ebb3b215599d52938d6d7a3 upstream.

Must drop reference taken by blk_make_request().

Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx>
Signed-off-by: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>

---
 drivers/block/virtio_blk.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -203,6 +203,7 @@ static int virtblk_get_id(struct gendisk
 	struct virtio_blk *vblk = disk->private_data;
 	struct request *req;
 	struct bio *bio;
+	int err;
 
 	bio = bio_map_kern(vblk->disk->queue, id_str, VIRTIO_BLK_ID_BYTES,
 			   GFP_KERNEL);
@@ -216,7 +217,10 @@ static int virtblk_get_id(struct gendisk
 	}
 
 	req->cmd_type = REQ_TYPE_SPECIAL;
-	return blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
+	err = blk_execute_rq(vblk->disk->queue, vblk->disk, req, false);
+	blk_put_request(req);
+
+	return err;
 }
 
 static int virtblk_ioctl(struct block_device *bdev, fmode_t mode,


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