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    DateTue, 21 Feb 2006 00:36:51 +0100
    FromEdgar Hucek <>
    Subject[PATCH 1/1] EFI iounpam fix for acpi_os_unmap_memory
    When EFI is enabled acpi_os_unmap_memory trys to unmap memory
    which was not mapped by acpi_os_map_memory.
    
    This patch for it.
    
    Signed-off-by: Edgar Hucek <hostmaster@ed-soft.at>
    
    diff -uNr linux-2.6.16-rc4.orig/drivers/acpi/osl.c
    linux-2.6.16-rc4/drivers/acpi/osl.c
    --- linux-2.6.16-rc4.orig/drivers/acpi/osl.c    2006-02-19
    18:48:58.000000000 +0100
    +++ linux-2.6.16-rc4/drivers/acpi/osl.c 2006-02-20 15:31:44.000000000 +0100
    @@ -208,7 +208,13 @@
    
     void acpi_os_unmap_memory(void __iomem * virt, acpi_size size)
     {
    -       iounmap(virt);
    +       if(efi_enabled) {
    +               if (!(EFI_MEMORY_WB &
    efi_mem_attributes(virt_to_phys(virt)))) {
    +                       iounmap(virt);
    +               }
    +       } else {
    +               iounmap(virt);
    +       }
     }
     EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
    -
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