From 7b0767502b5db11cb1f0daef2d01f6d71b1192dc Mon Sep 17 00:00:00 2001
From: Bob Liu <bob.liu@oracle.com>
Date: Wed, 22 Jul 2015 14:40:09 +0800
Subject: [PATCH] xen-blkfront: don't add indirect pages to list when
 !feature_persistent
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We should consider info->feature_persistent when adding indirect page to list
info->indirect_pages, else the BUG_ON() in blkif_free() would be triggered.

When we are using persistent grants the indirect_pages list
should always be empty because blkfront has pre-allocated enough
persistent pages to fill all requests on the ring.

CC: stable@vger.kernel.org
Acked-by: Roger Pau Monné <roger.pau@citrix.com>
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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