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: v2.6.27.9~79
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=867d011598fd1fec105752ecf09927fb444c5d9f;p=pandora-kernel.git

sparc64: Fix PCI resource mapping on sparc64

[ Upstream commit 145e1c0023585e0e8f6df22316308ec61c5066b2 ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

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