From 571dbbd4d044e11c78bc077acb3ccef4c77b096e Mon Sep 17 00:00:00 2001
From: Joerg Roedel <jroedel@suse.de>
Date: Fri, 12 Jun 2015 15:15:34 +0200
Subject: [PATCH] iommu/vt-d: Don't disable IR when it was previously enabled

Keep it enabled in kdump kernel to guarantee interrupt
delivery.

Tested-by: ZhenHua Li <zhen-hual@hp.com>
Tested-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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