From: Linas Vepstas <linas@linas.org>
Date: Fri, 4 Nov 2005 00:55:14 +0000 (-0600)
Subject: [PATCH] powerpc: IOMMU: don't ioremap null addresses
X-Git-Tag: v2.6.16-rc1~473^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d177c207ba16b1db31283e2d1fee7ad4a863584b;p=pandora-kernel.git

[PATCH] powerpc: IOMMU: don't ioremap null addresses

240-ioremap-null-ptr-test.patch

Under highly unusual circumstances, a buggy driver will ask a null ptr
to be ioremapped, an operation that curently succeeds but leads to
later trouble.  Instead, refuse to remap the null pointer.

Signed-off-by: Linas Vepstas <linas@austin.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
(cherry picked from e71d9e598533c1889e7162f5f4647e5d378c102c commit)
---

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