• Keir Fraser's avatar
    [PATCH] Fix mmap() of /dev/hpet · 609725f8
    Keir Fraser authored
    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: default avatarKeir Fraser <keir@xensource.com>
    Cc: Robert Picco <Robert.Picco@hp.com>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    609725f8
hpet.c 21 KB