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Message-ID: <20090109085807.2144c7d4@infradead.org>
Date:	Fri, 9 Jan 2009 08:58:07 -0800
From:	Dirk Hohndel <hohndel@...radead.org>
To:	"Zhao, Yu" <yu.zhao@...el.com>
Cc:	"Han, Weidong" <weidong.han@...el.com>,
	'Grant Grundler' <grundler@...isc-linux.org>,
	"'linux-pci@...r.kernel.org'" <linux-pci@...r.kernel.org>,
	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	'Jesse Barnes' <jbarnes@...tuousgeek.org>,
	"'iommu@...ts.linux-foundation.org'" 
	<iommu@...ts.linux-foundation.org>, 'Ingo Molnar' <mingo@...e.hu>,
	'Arjan van de Ven' <arjan@...radead.org>
Subject: [PATCH] Prevent oops at boot with VT-d


Resending with appropriate Subject

Signed-off-by: Dirk Hohndel <hohndel@...ux.intel.com>
Acked-by: Yu Zhao <yu.zhao@...el.com>
---
 drivers/pci/intel-iommu.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c
index 235fb7a..3dfecb2 100644
--- a/drivers/pci/intel-iommu.c
+++ b/drivers/pci/intel-iommu.c
@@ -438,7 +438,8 @@ static struct intel_iommu *device_to_iommu(u8 bus,
u8 devfn) continue;
 
 		for (i = 0; i < drhd->devices_cnt; i++)
-			if (drhd->devices[i]->bus->number == bus &&
+			if (drhd->devices[i] &&
+			    drhd->devices[i]->bus->number == bus &&
 			    drhd->devices[i]->devfn == devfn)
 				return drhd->iommu;
 
-- 
1.6.0.6
--
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