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[PATCH] powerpc: IOMMU: don't ioremap null addresses
authorLinas Vepstas <linas@linas.org>
Fri, 4 Nov 2005 00:55:14 +0000 (18:55 -0600)
committerPaul Mackerras <paulus@samba.org>
Tue, 10 Jan 2006 04:30:31 +0000 (15:30 +1100)
commit720ccfe7ef87248b3392409bdb2a2373a0333ad0
tree8afca673d77c1a15585b96df977e39601db535f5tree | snapshot
parent1644b1c15873eabd4e46d1b0f39d78d943a97e5bcommit | diff
[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)
arch/powerpc/mm/pgtable_64.c diff | blob | history
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