From: Joerg Roedel <joro@8bytes.org>
Date: Tue, 25 Mar 2014 19:16:40 +0000 (+0100)
Subject: iommu/vt-d: Check for NULL pointer in dmar_acpi_dev_scope_init()
X-Git-Tag: v3.15-rc1~70^2^6~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=11f1a7768;p=pandora-kernel.git

iommu/vt-d: Check for NULL pointer in dmar_acpi_dev_scope_init()

When ir_dev_scope_init() is called via a rootfs initcall it
will check for irq_remapping_enabled before it calls
(indirectly) into dmar_acpi_dev_scope_init() which uses the
dmar_tbl pointer without any checks.

The AMD IOMMU driver also sets the irq_remapping_enabled
flag which causes the dmar_acpi_dev_scope_init() function to
be called on systems with AMD IOMMU hardware too, causing a
boot-time kernel crash.

Signed-off-by: Joerg Roedel <joro@8bytes.org>
---

Reading git-diff-tree failed