From 29fcbcb3e028d63c3bb8a396bd696f82803f8053 Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Wed, 3 Apr 2013 10:05:41 -0700
Subject: Revert "xen/blkback: Don't trust the handle from the frontend."

This reverts commit c93c85196e2c7001daa8a04b83a9d6dd4febfb59 which is
commit 01c681d4c70d64cb72142a2823f27c4146a02e63 upstream.

It shouldn't have been applied to the 3.4-stable tree, sorry about that.

Reported-by: William Dauchy <wdauchy@gmail.com>
Cc: Jan Beulich <jbeulich@suse.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/block/xen-blkback/blkback.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index a8773d155c00..4fd1dea07ba0 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -646,6 +646,7 @@ static int dispatch_rw_block_io(struct xen_blkif *blkif,
 		goto fail_response;
 	}
 
+	preq.dev           = req->u.rw.handle;
 	preq.sector_number = req->u.rw.sector_number;
 	preq.nr_sects      = 0;
 
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