From: Max Dmitrichenko <dmitrmax@gmail.com>
Date: Sun, 2 Nov 2008 07:34:10 +0000 (-0700)
Subject: sparc64: Fix PCI resource mapping on sparc64
X-Git-Tag: v2.6.28-rc3~2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5769907ade8dda7002b304c03ef9e4ee5c1e0821;p=pandora-kernel.git

sparc64: Fix PCI resource mapping on sparc64

There is a problem discovered in recent versions of ATI Mach64 driver
in X.org on sparc64 architecture. In short, the driver fails to mmap
MMIO aperture (PCI resource #2).

I've found that kernel's __pci_mmap_make_offset() returns EINVAL. It
checks whether user attempts to mmap more than the resource length,
which is 0x1000 bytes in our case. But PAGE_SIZE on SPARC64 is 0x2000
and this is what actually is being mmaped. So __pci_mmap_make_offset()
failed for this PCI resource.

Signed-off-by: Max Dmitrichenko <dmitrmax@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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