| commit | 5a7aad9a559a5488cbef7aa3d4d96fc28220b8ae | |
| author | David Miller <davem@davemloft.net> | |
| Thu, 12 Feb 2009 10:15:27 +0000 (12 02:15 -0800) | ||
| committer | Dave Airlie <airlied@redhat.com> | |
| Fri, 13 Mar 2009 04:23:59 +0000 (13 14:23 +1000) | ||
| tree | 4a35fea85696e6cd41c81c71f34c2f7cf086aae3 | treesnapshot (tar.gz zip) |
| parent | 8e1004580e0c862cb6bbe2ff8e496f846c54052f | commitdiff |
drm: ati_pcigart: Do not access I/O MEM space using pointer derefs.
The PCI GART table initialization code treats the GART table mapping
unconditionally as a kernel virtual address.
But it could be in the framebuffer, for example, and thus we're
dealing with a PCI MEM space ioremap() cookie. Treating that as a
virtual address is illegal and will crash some system types (such as
sparc64 where the ioremap() return value is actually a physical I/O
address).
So access the area correctly, using gart_info->gart_table_location as
our guide.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
The PCI GART table initialization code treats the GART table mapping
unconditionally as a kernel virtual address.
But it could be in the framebuffer, for example, and thus we're
dealing with a PCI MEM space ioremap() cookie. Treating that as a
virtual address is illegal and will crash some system types (such as
sparc64 where the ioremap() return value is actually a physical I/O
address).
So access the area correctly, using gart_info->gart_table_location as
our guide.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Dave Airlie <airlied@linux.ie>
| drivers/gpu/drm/ati_pcigart.c | diffblobblamehistory |