From: Keir Fraser <Keir.Fraser@cl.cam.ac.uk>
Date: Fri, 23 Sep 2005 04:43:59 +0000 (-0700)
Subject: [PATCH] Fix mmap() of /dev/hpet
X-Git-Tag: v2.6.14-rc3~51^2~54
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=609725f87709724218047a1049913ed233f79d3c;p=pandora-kernel.git

[PATCH] Fix mmap() of /dev/hpet

The address passed to io_remap_pfn_range() in hpet_mmap() does not need to
be converted using __pa(): it is already a physical address.  This bug was
found and the patch suggested by Clay Harris.

I introduced this particular bug when making io_remap_pfn_range changes a
few months ago.  In fact mmap()ing /dev/hpet has *never* previously worked:
before my changes __pa() was being executed on an ioremap()ed virtual
address, which is also invalid.

Signed-off-by: Keir Fraser <keir@xensource.com>
Cc: Robert Picco <Robert.Picco@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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